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initial support for Mega65 extra ROM

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This commit is contained in:
FeralChild64 committed 2020-01-10 22:03:10 +01:00
1 parent 7539c6b072
commit 4d56864327
333 files changed
+1747 -289
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c64/kernal/,disabled/u64_load.s
+4
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@@ -1,3 +1,4 @@
#if ROM_LAYOUT_STD
//
// LOAD routine hook for fast loading via UltiDOS
@@ -129,3 +130,6 @@ u64_load_check_status_ok:
jmp !-
!:
rts
#endif // ROM layout
c64/kernal/,stubs/e6b6.advance_cursor.s
+4
View File
@@ -1,4 +1,8 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
// XXX provide documentation and implementation
STUB_IMPLEMENTATION()
#endif // ROM layout
c64/kernal/,stubs/e701.previous_line.s
+4
View File
@@ -1,4 +1,8 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
// XXX provide documentation and implementation
STUB_IMPLEMENTATION()
#endif // ROM layout
c64/kernal/,stubs/e716.chrout_screen.s
+4
View File
@@ -1,4 +1,8 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
// Screen CHROUT
STUB_IMPLEMENTATION()
#endif // ROM layout
c64/kernal/,stubs/e96c.insert_line_at_top.s
+4
View File
@@ -1,4 +1,8 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
// Insert line at top of screen
STUB_IMPLEMENTATION()
#endif // ROM layout
c64/kernal/,stubs/f646.iec_close.s
+4 -1
View File
@@ -1,5 +1,8 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
// IEC close
STUB_IMPLEMENTATION()
#endif // ROM layout
c64/kernal/,stubs/fd90.unknown.s
+4
View File
@@ -1,4 +1,8 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
// XXX provide documentation and implementation
STUB_IMPLEMENTATION()
#endif // ROM layout
c64/kernal/assets/cartridge_signature.s
+6
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@@ -1,3 +1,9 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
cartridge_signature:
.byte $C3,$C2,$CD,$38,$30
#endif // ROM layout
c64/kernal/assets/e8da.colour_codes.s
+4
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@@ -1,6 +1,10 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
// CHR$ codes for the 16 colours
colour_codes:
.byte 144,5,28,159,156,30,31,158
.byte 129,149,150,151,152,153,154,155
#endif // ROM layout
c64/kernal/assets/fd30.vector_defaults.s
+6 -2
View File
@@ -1,9 +1,10 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// Default values for Kernal vectors - described in:
//
// - [RG64] C64 Programmer's Reference Guide - page 293 (RESTOR), 304 (VECTOR)
// - [CM64] Compute's Mapping the Commodore 64 - page 237
// - [RG64] C64 Programmers Reference Guide - page 293 (RESTOR), 304 (VECTOR)
// - [CM64] Computes Mapping the Commodore 64 - page 237
//
vector_defaults:
@@ -24,3 +25,6 @@ vector_defaults:
.word default_brk_handler // USRCMD
.word LOAD // ILOAD
.word SAVE // ISAVE
#endif // ROM layout
c64/kernal/assets/irq_timing_hi.s
+4
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@@ -1,3 +1,4 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// Values for IRQ generation timer - original idea was:
@@ -21,3 +22,6 @@ irq_timing_hi: // high bytes
.byte >17045 // NTSC
.byte >16421 // PAL
#endif // ROM layout
c64/kernal/assets/irq_timing_lo.s
+4
View File
@@ -1,3 +1,4 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// Values for IRQ generation timer - original idea was:
@@ -21,3 +22,6 @@ irq_timing_lo: // low bytes
.byte <17045 // NTSC
.byte <16421 // PAL
#endif // ROM layout
c64/kernal/assets/kernal_messages.s
+4
View File
@@ -1,3 +1,4 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// Messages to be prined out by Kernal
@@ -110,3 +111,6 @@ __msg_kernalfeatures:
.byte $80 + $0D // end of string mark + return
#endif // CONFIG_SHOW_FEATURES
#endif // ROM layout
c64/kernal/errors.s
+9 -3
View File
@@ -1,5 +1,7 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
// Kernal error codes are described in 'Commodore 64 Programmer's Reference Guide', page 306
// Kernal error codes are described in 'Commodore 64 Programmers Reference Guide', page 306
kernalerror_ROUTINE_TERMINATED: // by a STOP key
lda #K_ERR_ROUTINE_TERMINATED
@@ -56,14 +58,15 @@ kernalerror_TOP_MEM_RS232:
sec
rts
// Kernal status codes are described in 'Commodore 64 Programmer's Reference Guide', page 292
// Kernal status codes are described in 'Commodore 64 Programmers Reference Guide', page 292
kernalstatus_reset:
lda #$00
sta IOSTATUS
rts
// The following two statuses are currentl not implemented - and most likely not really needed
// The following two statuses are currently not implemented - and most likely not really needed
// kernalstatus_TIMEOUT_WRITE:
// lda IOSTATUS
@@ -88,3 +91,6 @@ kernalstatus_DEVICE_NOT_FOUND:
ora #K_STS_DEVICE_NOT_FOUND
sta IOSTATUS
rts
#endif // ROM layout
c64/kernal/iec/acptr.s
+6 -2
View File
@@ -1,9 +1,10 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// Official Kernal routine, described in:
//
// - [RG64] C64 Programmer's Reference Guide - page 274
// - [CM64] Compute's Mapping the Commodore 64 - page 224/225
// - [RG64] C64 Programmers Reference Guide - page 274
// - [CM64] Computes Mapping the Commodore 64 - page 224/225
//
// CPU registers that has to be preserved (see [RG64]): .Y
//
@@ -28,3 +29,6 @@ ACPTR:
#else
jmp kernalerror_ILLEGAL_DEVICE_NUMBER
#endif
#endif // ROM layout
c64/kernal/iec/chkin_iec.s
+4
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@@ -1,3 +1,4 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// IEC part of the CHKIN routine
@@ -29,3 +30,6 @@ chkin_iec:
jmp chkin_set_device
#endif // CONFIG_IEC
#endif // ROM layout
c64/kernal/iec/chrin_iec.s
+4
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@@ -1,3 +1,4 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// IEC part of the CHRIN routine
@@ -8,3 +9,6 @@ chrin_iec:
// XXX is this really all?
jmp JACPTR
#endif // ROM layout
c64/kernal/iec/chrout_iec.s
+4
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@@ -1,3 +1,4 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// IEC part of the CHROUT routine
@@ -10,3 +11,6 @@ chrout_iec:
jsr JCIOUT
bcc_far chrout_done_success
jmp chrout_done_fail
#endif // ROM layout
c64/kernal/iec/ciout.s
+6 -2
View File
@@ -1,9 +1,10 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// Official Kernal routine, described in:
//
// - [RG64] C64 Programmer's Reference Guide - page 279/280
// - [CM64] Compute's Mapping the Commodore 64 - page 224
// - [RG64] C64 Programmers Reference Guide - page 279/280
// - [CM64] Computes Mapping the Commodore 64 - page 224
//
// CPU registers that has to be preserved (see [RG64]): .X, .Y
//
@@ -47,3 +48,6 @@ ciout_send_byte:
rts
#endif
#endif // ROM layout
c64/kernal/iec/ckout_iec.s
+4
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@@ -1,3 +1,4 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// IEC part of the CKOUT routine
@@ -29,3 +30,6 @@ ckout_iec:
#endif // CONFIG_IEC
#endif // ROM layout
c64/kernal/iec/close_iec.s
+4
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@@ -1,3 +1,4 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// IEC part of the CLOSE routine
@@ -33,3 +34,6 @@ close_iec_end:
#endif // CONFIG_IEC
#endif // ROM layout
c64/kernal/iec/clrchn_iec.s
+4
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@@ -1,3 +1,4 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// IEC part of the CLRCHN routine
@@ -28,3 +29,6 @@ clrchn_iec:
#endif // CONFIG_IEC
#endif // ROM layout
c64/kernal/iec/iec_check_devnum.s
+4
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@@ -1,3 +1,4 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// Checks whether device number (in .A) is a correct IEC device number
@@ -31,3 +32,6 @@ iec_check_devnum_failed:
rts
#endif // CONFIG_IEC
#endif // ROM layout
c64/kernal/iec/iec_close_load.s
+4
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@@ -1,3 +1,4 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// Common part of CLOSE and LOAD/SAVE routines for IEC
@@ -29,3 +30,6 @@ iec_close_load:
#endif // CONFIG_IEC
#endif // ROM layout
c64/kernal/iec/iec_cmd_close.s
+4
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@@ -1,3 +1,4 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// Kernal internal IEC routine
@@ -21,3 +22,6 @@ iec_cmd_close:
#endif // CONFIG_IEC
#endif // ROM layout
c64/kernal/iec/iec_cmd_open.s
+4
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@@ -1,3 +1,4 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// Kernal internal IEC routine
@@ -66,3 +67,6 @@ iec_check_channel_openclose:
#endif // CONFIG_IEC
#endif // ROM layout
c64/kernal/iec/iec_pull_release.s
+4
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@@ -1,3 +1,4 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// Helper IEC routines to pull/release certain lines
@@ -83,3 +84,6 @@ iec_pull_release_end:
#endif // CONFIG_IEC
#endif // ROM layout
c64/kernal/iec/iec_return.s
+4
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@@ -1,3 +1,4 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// Helper routines to return with error/success
@@ -39,3 +40,6 @@ iec_return_DEVICE_NOT_FOUND:
#endif // CONFIG_IEC
#endif // ROM layout
c64/kernal/iec/iec_rx_byte.s
+5
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@@ -1,3 +1,5 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
// Receive a byte from the IEC bus.
// Implemented based on https://www.pagetable.com/?p=1135, https://github.com/mist64/cbmbus_doc,
// http://www.zimmers.net/anonftp/pub/cbm/programming/serial-bus.pdf (page 11)
@@ -155,3 +157,6 @@ iec_rx_end:
#endif // CONFIG_IEC
#endif // ROM layout
c64/kernal/iec/iec_rx_check_eoi.s
+4
View File
@@ -1,3 +1,4 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// Helper routine to check for EOI while receiving byte from IEC
@@ -33,3 +34,6 @@ iec_rx_check_eoi_confirm:
iec_rx_check_eoi_done:
rts
#endif // ROM layout
c64/kernal/iec/iec_send_file_name.s
+4
View File
@@ -1,3 +1,4 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// Sends file (stream) name to IEC device
@@ -42,3 +43,6 @@ iec_send_file_name_done:
#endif // CONFIG_IEC
#endif // ROM layout
c64/kernal/iec/iec_set_idle.s
+4
View File
@@ -1,3 +1,4 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
#if CONFIG_IEC
@@ -12,3 +13,6 @@ iec_set_idle:
#endif // CONFIG_IEC
#endif // ROM layout
c64/kernal/iec/iec_turnaround_to_listen.s
+5
View File
@@ -1,3 +1,5 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
// According to http://www.zimmers.net/anonftp/pub/cbm/programming/serial-bus.pdf
// pages 7--8.
// See also https://www.pagetable.com/?p=1135, https://github.com/mist64/cbmbus_doc
@@ -39,3 +41,6 @@ iec_turnaround_to_listen:
#endif // CONFIG_IEC
#endif // ROM layout
c64/kernal/iec/iec_turnaround_to_talk.s
+5
View File
@@ -1,3 +1,5 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
// According to http://www.zimmers.net/anonftp/pub/cbm/programming/serial-bus.pdf
// pages 7--8.
// See also https://www.pagetable.com/?p=1135, https://github.com/mist64/cbmbus_doc
@@ -31,3 +33,6 @@ iec_turnaround_to_talk:
#endif // CONFIG_IEC
#endif // ROM layout
c64/kernal/iec/iec_tx_byte.s
+4
View File
@@ -1,3 +1,4 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
// Implemented based on https://www.pagetable.com/?p=1135, https://github.com/mist64/cbmbus_doc
@@ -161,3 +162,6 @@ iec_tx_common_finalize:
#endif // CONFIG_IEC
#endif // ROM layout
c64/kernal/iec/iec_tx_command.s
+4
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@@ -1,3 +1,4 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
// Implemented based on https://www.pagetable.com/?p=1135, https://github.com/mist64/cbmbus_doc
@@ -41,3 +42,6 @@ iec_tx_command:
#endif // CONFIG_IEC
#endif // ROM layout
c64/kernal/iec/iec_tx_command_finalize.s
+5
View File
@@ -1,3 +1,5 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
// Routine to finalize some IEC commands - which do not end in turnaround and are not followed by others
// Implemented based on https://www.pagetable.com/?p=1135, https://github.com/mist64/cbmbus_doc
@@ -22,3 +24,6 @@ iec_tx_command_finalize:
#endif // CONFIG_IEC
#endif // ROM layout
c64/kernal/iec/iec_tx_flush.s
+4
View File
@@ -1,3 +1,4 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
// Flush the IEC output buffer (if not empty) - send byte with EOI
//
@@ -20,3 +21,6 @@ iec_tx_flush:
#endif // CONFIG_IEC
#endif // ROM layout
c64/kernal/iec/iec_update_eal_by_y.s
+4
View File
@@ -1,3 +1,4 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// Common EAL update routine
@@ -19,3 +20,6 @@ iec_update_EAL_by_Y: // note: Carry has to be set by caller!
#endif
#endif // ROM layout
c64/kernal/iec/iec_wait1ms.s
+5 -1
View File
@@ -1,9 +1,10 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// Wait 1 ms (1000 usec)
//
// On NTSC this means 1023 cycles (slightly less on PAL, but we have to be sure).
// We can't count on badlines, as the screen might be disabled.
// We cant count on badlines, as the screen might be disabled.
// Delay here is implemented using VIC-II raster register. Since one raster is
// 63 cycles, we need at least 17 full rasters to be 100% sure we wait enough
@@ -31,3 +32,6 @@ wait_x_bars: // additional entry point for delayy in screen and tape support
iec_wait_rts: // dummy RTS, for very short waits
rts
#endif // ROM layout
c64/kernal/iec/iec_wait20us.s
+4
View File
@@ -1,3 +1,4 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
#if CONFIG_IEC
@@ -26,3 +27,6 @@ iec_wait20us:
// 21 cycles
#endif // CONFIG_IEC
#endif // ROM layout
c64/kernal/iec/iec_wait60us.s
+4
View File
@@ -1,3 +1,4 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// Note: damages .X
@@ -31,3 +32,6 @@ iec_wait60us:
#endif // CONFIG_IEC
#endif // ROM layout
c64/kernal/iec/iec_wait_for_clk_release.s
+4
View File
@@ -1,3 +1,4 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
#if CONFIG_IEC
@@ -11,3 +12,6 @@ iec_wait_for_clk_release:
#endif // CONFIG_IEC
#endif // ROM layout
c64/kernal/iec/iec_wait_for_data_pull.s
+4
View File
@@ -1,3 +1,4 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
#if CONFIG_IEC
@@ -13,3 +14,6 @@ iec_wait_for_data_pull:
#endif // CONFIG_IEC
#endif // ROM layout
c64/kernal/iec/iec_wait_for_data_release.s
+4
View File
@@ -1,3 +1,4 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
#if CONFIG_IEC
@@ -12,3 +13,6 @@ iec_wait_for_data_release:
rts
#endif // CONFIG_IEC
#endif // ROM layout
c64/kernal/iec/listen.s
+6 -2
View File
@@ -1,9 +1,10 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// Official Kernal routine, described in:
//
// - [RG64] C64 Programmer's Reference Guide - page 285
// - [CM64] Compute's Mapping the Commodore 64 - page 223
// - [RG64] C64 Programmers Reference Guide - page 285
// - [CM64] Computes Mapping the Commodore 64 - page 223
// - https://www.pagetable.com/?p=1031, https://github.com/mist64/cbmbus_doc
// - http://www.zimmers.net/anonftp/pub/cbm/programming/serial-bus.pdf
//
@@ -33,3 +34,6 @@ LISTEN:
jmp kernalerror_ILLEGAL_DEVICE_NUMBER
#endif
#endif // ROM layout
c64/kernal/iec/load_iec.s
+4
View File
@@ -1,3 +1,4 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// IEC part of the LOAD routine
@@ -192,3 +193,6 @@ load_iec_get_addr_byte:
#endif // CONFIG_IEC
#endif // ROM layout
c64/kernal/iec/open_iec.s
+4
View File
@@ -1,3 +1,4 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// IEC part of the OPEN routine
@@ -38,3 +39,6 @@ open_iec_done:
#endif // CONFIG_IEC
#endif // ROM layout
c64/kernal/iec/save_iec.s
+5 -1
View File
@@ -1,3 +1,4 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// IEC part of the SAVE routine
@@ -124,4 +125,7 @@ iec_save_loop_end:
rts
#endif // CONFIG_IEC
#endif // CONFIG_IEC
#endif // ROM layout
c64/kernal/iec/second.s
+6 -2
View File
@@ -1,9 +1,10 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// Official Kernal routine, described in:
//
// - [RG64] C64 Programmer's Reference Guide - page 296
// - [CM64] Compute's Mapping the Commodore 64 - page 223/224
// - [RG64] C64 Programmers Reference Guide - page 296
// - [CM64] Computes Mapping the Commodore 64 - page 223/224
// - https://www.pagetable.com/?p=1031, , https://github.com/mist64/cbmbus_doc
//
// CPU registers that has to be preserved (see [RG64]): .X, .Y
@@ -28,3 +29,6 @@ SECOND:
jmp kernalerror_ILLEGAL_DEVICE_NUMBER
#endif
#endif // ROM layout
c64/kernal/iec/talk.s
+6 -2
View File
@@ -1,9 +1,10 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// Official Kernal routine, described in:
//
// - [RG64] C64 Programmer's Reference Guide - page 301/302
// - [CM64] Compute's Mapping the Commodore 64 - page 223
// - [RG64] C64 Programmers Reference Guide - page 301/302
// - [CM64] Computes Mapping the Commodore 64 - page 223
// - https://www.pagetable.com/?p=1031, https://github.com/mist64/cbmbus_doc
// - http://www.zimmers.net/anonftp/pub/cbm/programming/serial-bus.pdf
//
@@ -46,3 +47,6 @@ common_talk_listen: // common part of TALK and LISTEN
jmp kernalerror_ILLEGAL_DEVICE_NUMBER
#endif
#endif // ROM layout
c64/kernal/iec/tksa.s
+6 -2
View File
@@ -1,9 +1,10 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// Official Kernal routine, described in:
//
// - [RG64] C64 Programmer's Reference Guide - page 302
// - [CM64] Compute's Mapping the Commodore 64 - page 224
// - [RG64] C64 Programmers Reference Guide - page 302
// - [CM64] Computes Mapping the Commodore 64 - page 224
// - https://www.pagetable.com/?p=1031, https://github.com/mist64/cbmbus_doc
//
// CPU registers that has to be preserved (see [RG64]): .X, .Y
@@ -28,3 +29,6 @@ TKSA:
jmp kernalerror_ILLEGAL_DEVICE_NUMBER
#endif
#endif // ROM layout
c64/kernal/iec/unlsn.s
+6 -2
View File
@@ -1,9 +1,10 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// Official Kernal routine, described in:
//
// - [RG64] C64 Programmer's Reference Guide - page 303
// - [CM64] Compute's Mapping the Commodore 64 - page 224
// - [RG64] C64 Programmers Reference Guide - page 303
// - [CM64] Computes Mapping the Commodore 64 - page 224
// - https://www.pagetable.com/?p=1031, , https://github.com/mist64/cbmbus_doc
// - http://www.zimmers.net/anonftp/pub/cbm/programming/serial-bus.pdf
//
@@ -35,3 +36,6 @@ UNLSN:
jmp kernalerror_ILLEGAL_DEVICE_NUMBER
#endif
#endif // ROM layout
c64/kernal/iec/untlk.s
+7 -3
View File
@@ -1,9 +1,10 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// Official Kernal routine, described in:
//
// - [RG64] C64 Programmer's Reference Guide - page 304
// - [CM64] Compute's Mapping the Commodore 64 - page 224
// - [RG64] C64 Programmers Reference Guide - page 304
// - [CM64] Computes Mapping the Commodore 64 - page 224
// - https://www.pagetable.com/?p=1031, , https://github.com/mist64/cbmbus_doc
// - http://www.zimmers.net/anonftp/pub/cbm/programming/serial-bus.pdf
//
@@ -33,7 +34,7 @@ common_untlk_tksa: // common part of UNTLK and TKSA
sta TBTCNT
jsr iec_tx_command
bcs !+ // branch if error
// XXX - for TKSA, is it really the right place to do a turnaround? I've got some doubts
// XXX - for TKSA, is it really the right place to do a turnaround? I have some doubts
// (it forces us to send the TKSA command 'manually' sometimes), but
// Luigi Di Fraia (https://luigidifraia.wordpress.com/2017/06/27/codebase64-on-the-kernal-behaviour/)
// claims TKSA Kernal routine actually does the turnaround
@@ -46,3 +47,6 @@ common_untlk_tksa: // common part of UNTLK and TKSA
jmp kernalerror_ILLEGAL_DEVICE_NUMBER
#endif
#endif // ROM layout
c64/kernal/iec_fast/burst_cia1_advertise.s
+4
View File
@@ -1,3 +1,4 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// Advertise burst IEC protocol support to the receiver
@@ -31,3 +32,6 @@ burst_advertise_done:
#endif
#endif // ROM layout
c64/kernal/iec_fast/burst_cia2_advertise.s
+4
View File
@@ -1,3 +1,4 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// Advertise burst IEC protocol support to the receiver
@@ -55,3 +56,6 @@ burst_advertise_done:
#endif
#endif // ROM layout
c64/kernal/iec_fast/burst_soft_advertise.s
+4
View File
@@ -1,3 +1,4 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// Advertise burst IEC protocol support to the receiver
@@ -26,3 +27,6 @@ burst_advertise_done:
#endif
#endif // ROM layout
c64/kernal/iec_fast/dolphindos_detect.s
+4
View File
@@ -1,3 +1,4 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// Helper routine for JiffyDOS detection
@@ -60,3 +61,6 @@ dolphindos_detect_success:
#endif // CONFIG_IEC_DOLPHINDOS
#endif // ROM layout
c64/kernal/iec_fast/dolphindos_load.s
+4
View File
@@ -1,3 +1,4 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// DolphinDOS protocol support for IEC - optimized load loop
@@ -117,3 +118,6 @@ dolphindos_load_end:
#endif // CONFIG_IEC_DOLPHINDOS and not CONFIG_MEMORY_MODEL_60K
#endif // ROM layout
c64/kernal/iec_fast/jiffydos_bittable.s
+4
View File
@@ -1,3 +1,4 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// Helper table for encoding lower nibble for JiffyDOS,
@@ -37,3 +38,6 @@ jiffydos_bittable:
#endif // CONFIG_IEC_JIFFYDOS
#endif // ROM layout
c64/kernal/iec_fast/jiffydos_detect.s
+4
View File
@@ -1,3 +1,4 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// Helper routine for JiffyDOS detection
@@ -49,3 +50,6 @@ jiffydos_detect_end:
#endif // CONFIG_IEC_JIFFYDOS
#endif // ROM layout
c64/kernal/iec_fast/jiffydos_load.s
+4
View File
@@ -1,3 +1,4 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// JiffyDOS protocol support for IEC - optimized load loop
@@ -168,3 +169,6 @@ jiffydos_load_end:
#endif // CONFIG_IEC_JIFFYDOS and not CONFIG_MEMORY_MODEL_60K
#endif // ROM layout
c64/kernal/iec_fast/jiffydos_prepare.s
+4
View File
@@ -1,3 +1,4 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// JiffyDOS transfer preparation routine
@@ -27,3 +28,6 @@ jiffydos_prepare:
#endif // CONFIG_IEC_JIFFYDOS
#endif // ROM layout
c64/kernal/iec_fast/jiffydos_rx_byte.s
+4
View File
@@ -1,3 +1,4 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// JiffyDOS protocol support for IEC - byte reception
@@ -108,3 +109,6 @@ jiffydos_rx_byte_end:
#endif // CONFIG_IEC_JIFFYDOS
#endif // ROM layout
c64/kernal/iec_fast/jiffydos_tx_byte.s
+4
View File
@@ -1,3 +1,4 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// JiffyDOS protocol support for IEC - byte transfer
@@ -101,3 +102,6 @@ jiffydos_tx_byte_wait_eoi:
#endif // CONFIG_IEC_JIFFYDOS
#endif // ROM layout
c64/kernal/iec_fast/jiffydos_wait_line.s
+4
View File
@@ -1,3 +1,4 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// JiffyDOS helper routine to wait for appropriate moment,
@@ -32,3 +33,6 @@ jiffydos_wait_line_done:
#endif // CONFIG_IEC_JIFFYDOS
#endif // ROM layout
c64/kernal/init/cartridge_check.s
+5
View File
@@ -1,3 +1,5 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
// c64 prg p263
cartridge_check:
@@ -11,3 +13,6 @@ cartridge_check_l1:
// FALLTROUGH
no_cartridge:
rts
#endif // ROM layout
c64/kernal/init/cint_screen_keyboard.s
+13 -9
View File
@@ -1,10 +1,11 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// This is a part CINT which initializes screen and keyboard
//
// For more details see:
// - [RG64] C64 Programmer's Reference Guide - page 280
// - [CM64] Compute's Mapping the Commodore 64 - page 242
// - [RG64] C64 Programmers Reference Guide - page 280
// - [CM64] Computes Mapping the Commodore 64 - page 242
cint_screen_keyboard:
@@ -15,7 +16,7 @@ cint_screen_keyboard:
lda #>scnkey_set_keytab
sta KEYLOG+1
// Initialise cursor blink flags (Compute's Mapping the 64 p215)
// Initialise cursor blink flags (Computes Mapping the 64 p215)
lda #$01
sta BLNCT
@@ -30,7 +31,7 @@ cint_screen_keyboard:
#endif
// Set keyboard decode vector (Compute's Mapping the 64 p215)
// Set keyboard decode vector (Computes Mapping the 64 p215)
#if CONFIG_LEGACY_SCNKEY
@@ -42,10 +43,10 @@ cint_screen_keyboard:
bpl !-
sta BufferQuantity
// Set key repeat delay (Compute's Mapping the 64 p215)
// Set key repeat delay (Computes Mapping the 64 p215)
// Making some numbers up here: Repeat every ~1/10th sec
// But require key to be held for ~1/3sec before
// repeating (Compute's Mapping the 64 p58)
// repeating (Computes Mapping the 64 p58)
// Not needed for default keyboard scanning code
@@ -54,11 +55,11 @@ cint_screen_keyboard:
#endif
// Set current colour for text (Compute's Mapping the 64 p215)
// Set current colour for text (Computes Mapping the 64 p215)
ldx #$01 // default is light blue ($0E), but we use a different one
stx COLOR
// Set maximum keyboard buffer size (Compute's Mapping the 64 p215)
// Set maximum keyboard buffer size (Computes Mapping the 64 p215)
ldx #10
stx XMAX
@@ -66,6 +67,9 @@ cint_screen_keyboard:
ldx #$00
stx MODE
// Fallthrough/jump to screen clear routine (Compute's Mapping the 64 p215)
// Fallthrough/jump to screen clear routine (Computes Mapping the 64 p215)
jmp clear_screen
#endif // ROM layout
c64/kernal/init/e518.cint_legacy.s
+6 -2
View File
@@ -1,9 +1,10 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// Part of the official Kernal routine, described in:
//
// - [RG64] C64 Programmer's Reference Guide - page 280
// - [CM64] Compute's Mapping the Commodore 64 - page 242
// - [RG64] C64 Programmers Reference Guide - page 280
// - [CM64] Computes Mapping the Commodore 64 - page 242
//
// CPU registers that has to be preserved (see [RG64]): none
//
@@ -20,3 +21,6 @@ cint_legacy: // $E518
// Game 'Operacja Proboszcz' is one example.
jmp cint_screen_keyboard // XXX try to fit the code here
#endif // ROM layout
c64/kernal/init/e5a0.setup_vicii.s
+6 -2
View File
@@ -1,8 +1,9 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// Well-known Kernal routine, described in:
//
// - [CM64] Compute's Mapping the Commodore 64 - page 215
// - [CM64] Computes Mapping the Commodore 64 - page 215
//
@@ -20,7 +21,7 @@ setup_vicii:
#if !CONFIG_MB_MEGA_65 && !CONFIG_MB_ULTIMATE_64
// Disable C128 extra keys - just to be sure they won't interfere with anything
// Disable C128 extra keys - just to be sure they will not interfere with anything
stx VIC_XSCAN
@@ -64,3 +65,6 @@ setup_vicii:
// Setup default I/O devices
jmp clrchn_reset
#endif // ROM layout
c64/kernal/init/fce2.hw_entry_reset.s
+5
View File
@@ -1,3 +1,5 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
// Resources describing the C64 reset sequence:
// https://www.c64-wiki.com/wiki/Reset_(Process)
@@ -48,3 +50,6 @@ hw_entry_reset:
// c64 prg p269
jmp (IBASIC_COLD_START)
#endif // ROM layout
c64/kernal/init/fd50.ramtas.s
+9 -5
View File
@@ -1,18 +1,19 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// Official Kernal routine, described in:
//
// - [RG64] C64 Programmer's Reference Guide - page 291
// - [CM64] Compute's Mapping the Commodore 64 - page 237
// - [RG64] C64 Programmers Reference Guide - page 291
// - [CM64] Computes Mapping the Commodore 64 - page 237
//
// CPU registers that has to be preserved (see [RG64]): none
//
RAMTAS:
// C64 Programmer's Reference guide p291:
// C64 Programmers Reference guide p291:
// Clear $0000-$0101, $0200-$03ff
// PGS: $0000, $0001 are CPU IO ports, so shouldn't get written to
// PGS: $0000, $0001 are CPU IO ports, so should not get written to
// How many ways are there to efficiently erase these two pages
// of RAM? We would like to avoid any unnecessary byte similarity
@@ -26,7 +27,7 @@ RAMTAS:
!:
sta $0300,Y
sta $0200,Y
sta $0002,Y // that's why we don't use .X for index, we do not want zeropage addressing here!
sta $0002,Y // that is why we do not use .X for index, we do not want zeropage addressing here!
iny
bne !-
@@ -81,3 +82,6 @@ ramtas_32k:
ldy #$80
bne !- // branch always
#endif // ROM layout
c64/kernal/init/fda3.ioinit.s
+6 -2
View File
@@ -1,9 +1,10 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// Official Kernal routine, described in:
//
// - [RG64] C64 Programmer's Reference Guide - page 285
// - [CM64] Compute's Mapping the Commodore 64 - page 238
// - [RG64] C64 Programmers Reference Guide - page 285
// - [CM64] Computes Mapping the Commodore 64 - page 238
//
// CPU registers that has to be preserved (see [RG64]): none
//
@@ -142,3 +143,6 @@ IOINIT:
rts
#endif
#endif // ROM layout
c64/kernal/init/ff5b.cint.s
+6 -2
View File
@@ -1,9 +1,10 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// Official Kernal routine, described in:
//
// - [RG64] C64 Programmer's Reference Guide - page 280
// - [CM64] Compute's Mapping the Commodore 64 - page 242
// - [RG64] C64 Programmers Reference Guide - page 280
// - [CM64] Computes Mapping the Commodore 64 - page 242
//
// CPU registers that has to be preserved (see [RG64]): none
//
@@ -12,3 +13,6 @@ CINT:
jsr cint_legacy
jmp setup_pal_ntsc
#endif // ROM layout
c64/kernal/init/fffc.vector_reset.s
+5
View File
@@ -1,4 +1,9 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
// $FFFC - CPU Reset Vector
// Uncontrovertial, as it is a CPU requirement, and nothing else.
.word hw_entry_reset
#endif // ROM layout
c64/kernal/init/setup_pal_ntsc.s
+5 -1
View File
@@ -1,5 +1,6 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
// Detect video system (PAL/NTSC), use Graham's method, as it's short and reliable
// Detect video system (PAL/NTSC), use method by Graham, as it is short and reliable
// see here: https://codebase64.org/doku.php?id=base:detect_pal_ntsc
@@ -59,3 +60,6 @@ setup_irq_timer: // entry point needed by UP9600 and CIA1 burst mod support
sta CIA1_TIMAHI // $DC05
rts
#endif // ROM layout
c64/kernal/interrupts/ea31.default_irq_handler.s
+5
View File
@@ -1,3 +1,5 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
default_irq_handler:
@@ -42,3 +44,6 @@ default_irq_handler_end_tape:
// Acknowledge CIA interrupt and return
jmp clear_cia1_interrupt_flag_and_return_from_interrupt
#endif // ROM layout
c64/kernal/interrupts/ea7e.ack_cia1_return_from_interrupt.s
+5
View File
@@ -1,3 +1,5 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
// https://csdb.dk/forums/index.php?roomid=11&topicid=5776
// Clear the CIA1 interrupt flag, and then fall through to
// the return from interrupt routine
@@ -9,3 +11,6 @@ clear_cia1_interrupt_flag_and_return_from_interrupt:
ldy CIA1_ICR
// FALL THROUGH to $EA81
#endif // ROM layout
c64/kernal/interrupts/ea81.return_from_interrupt.s
+7 -2
View File
@@ -1,8 +1,10 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
// The IRQ is a commonly messed with thing on the C64,
// so we need to handle entry points that are commonly
// relied upon, including:
// $EA31 - Standard IRQ routine
// $EA61 - Check keyboard, but don't update timer? https://github.com/cc65/cc65/issues/324
// $EA61 - Check keyboard, but do not update timer? https://github.com/cc65/cc65/issues/324
// $EA81 - https://www.lemon64.com/forum/viewtopic.php?t=2112&sid=6ea01982b26da69783120a7923ca46fb
// Also the $0314 vector is widely used (e.g., https://www.lemon64.com/forum/viewtopic.php?t=2112&sid=6ea01982b26da69783120a7923ca46fb)
@@ -10,9 +12,12 @@
return_from_interrupt:
// Restore registers and return
// Sequence according to Compute's Mapping the 64 p73
// Sequence according to Computes Mapping the 64 p73
ply_trash_a
plx_trash_a
pla
rti
#endif // ROM layout
c64/kernal/interrupts/fe47.default_nmi_handler.s
+7 -3
View File
@@ -1,10 +1,11 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
default_nmi_handler:
// Implemented according to Compute's Mapping the Commodore 64, page 74
// Implemented according to Computes Mapping the Commodore 64, page 74
// and to https://www.c64-wiki.com/wiki/Interrupt
// Save registers, sequence according to Compute's Mapping the Commodore 64, page 73
// Save registers, sequence according to Computes Mapping the Commodore 64, page 73
pha
phx_trash_a
phy_trash_a
@@ -25,8 +26,11 @@ default_nmi_handler:
bcs !+
jmp return_from_interrupt // no STOP pressed
!:
// STOP + RESTORE - clean the address of the BRK instruction (it's not BRK) first
// STOP + RESTORE - clean the address of the BRK instruction (it is not BRK) first
lda #$00
sta CMP0+0
sta CMP0+1
jmp (CBINV)
#endif // ROM layout
c64/kernal/interrupts/fe66.default_brk_handler.s
+8 -4
View File
@@ -1,9 +1,10 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
default_brk_handler:
// Implemented according to Compute's Mapping the Commodore 64, pages 73-74
// Implemented according to Computes Mapping the Commodore 64, pages 73-74
sei // disable IRQs, to be sure they won't interfere
sei // disable IRQs, to be sure they wont interfere
ldx #$00
sta VIC_SCROLX // turn the display off - we want as little screen artifacts as possible
@@ -13,8 +14,8 @@ default_brk_handler:
jsr JRESTOR
jsr JIOINIT
// Original routine calls just a part of CINT - but I'm not sure which one. Most likely it
// skips the PAL/NTSC check by calling $E518. I suspect bug in the original ROM, let's
// Original routine calls just a part of CINT - but I am not sure which one. Most likely it
// skips the PAL/NTSC check by calling $E518. I suspect bug in the original ROM, lets
// call the whole CINT, just to be sure everything is initialized.
jsr CINT
@@ -22,3 +23,6 @@ default_brk_handler:
cli
jmp (IBASIC_WARM_START)
#endif // ROM layout
c64/kernal/interrupts/fffa.vector_nmi.s
+5
View File
@@ -1,4 +1,9 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
// $FFFA - CPU NMI Hanlder
// Uncontrovertial as this is also a CPU requirement.
.word hw_entry_nmi
#endif // ROM layout
c64/kernal/interrupts/fffe.vector_irq.s
+5
View File
@@ -1,5 +1,10 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
// $FFFE - CPU IRQ Vector.
// This is non-controvertial, as it is a 6502 CPU requirement, and we just have to point
// it to whatever IRQ routine we make.
.word hw_entry_irq
#endif // ROM layout
c64/kernal/interrupts/hw_entry_irq.s
+7 -2
View File
@@ -1,3 +1,5 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
hw_entry_irq:
@@ -5,11 +7,11 @@ hw_entry_irq:
// so we need to handle entry points that are commonly
// relied upon, including:
// $EA31 - Standard IRQ routine
// $EA61 - Check keyboard, but don't update timer? https://github.com/cc65/cc65/issues/324
// $EA61 - Check keyboard, but do not update timer? https://github.com/cc65/cc65/issues/324
// $EA81 - https://www.lemon64.com/forum/viewtopic.php?t=2112&sid=6ea01982b26da69783120a7923ca46fb
// Also the $0314 vector is widely used (e.g., https://www.lemon64.com/forum/viewtopic.php?t=2112&sid=6ea01982b26da69783120a7923ca46fb)
// Save registers, sequence according to Compute's Mapping the Commodore 64, page 73
// Save registers, sequence according to Computes Mapping the Commodore 64, page 73
pha
phx_trash_a
phy_trash_a
@@ -46,3 +48,6 @@ irq_handler_brk:
// Interrupt caused by BRK
jmp (CBINV)
#endif // ROM layout
c64/kernal/interrupts/hw_entry_nmi.s
+6 -1
View File
@@ -1,7 +1,9 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
hw_entry_nmi:
sei // don't allow IRQ to interfere, see https://www.c64-wiki.com/wiki/Interrupt
sei // do not allow IRQ to interfere, see https://www.c64-wiki.com/wiki/Interrupt
#if CONFIG_CPU_MOS_6502 && CONFIG_BCD_SAFE_INTERRUPTS
cld // clear decimal flag to allow using it without disabling interrupts
@@ -18,3 +20,6 @@ hw_entry_nmi:
// Vector not initialized - call default interrupt routine
pla
jmp default_nmi_handler
#endif // ROM layout
c64/kernal/iostack/chkinout.s
+4
View File
@@ -1,3 +1,4 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// Common part of CHKIN and CKOUT
@@ -16,3 +17,6 @@ chkinout_file_not_open:
ply_trash_a
pla
jmp kernalerror_FILE_NOT_OPEN
#endif // ROM layout
c64/kernal/iostack/clall_real.s
+6 -3
View File
@@ -1,9 +1,10 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// Official Kernal routine, described in:
//
// - [RG64] C64 Programmer's Reference Guide - page 281
// - [CM64] Compute's Mapping the Commodore 64 - page 230
// - [RG64] C64 Programmers Reference Guide - page 281
// - [CM64] Computes Mapping the Commodore 64 - page 230
//
// CPU registers that has to be preserved (see [RG64]): .Y
//
@@ -16,7 +17,7 @@ clall_real:
// Original routine probably just sets LDTND to 0, but this is not really safe,
// so we actually close all the channels; at least IDE64 does the same for
// it's channels, see CLALL description in the IDE64 User's Guide
// its channels, see CLALL description in the IDE64 Users Guide
!:
ldy LDTND
beq !+
@@ -34,3 +35,5 @@ clall_real:
// Not sure whether original Kernal does so, but it seems sane to also clear possible errors
jmp kernalstatus_reset
#endif // ROM layout
c64/kernal/iostack/f13e.getin.s
+6 -2
View File
@@ -1,9 +1,10 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// Official Kernal routine, described in:
//
// - [RG64] C64 Programmer's Reference Guide - page 283
// - [CM64] Compute's Mapping the Commodore 64 - page 227/228
// - [RG64] C64 Programmers Reference Guide - page 283
// - [CM64] Computes Mapping the Commodore 64 - page 227/228
//
// CPU registers that has to be preserved (see [RG64]): for RS-232: .X, .Y
//
@@ -11,3 +12,6 @@
GETIN:
jmp getin_real
#endif // ROM layout
c64/kernal/iostack/f157.chrin.s
+6 -2
View File
@@ -1,9 +1,10 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// Official Kernal routine, described in:
//
// - [RG64] C64 Programmer's Reference Guide - page 277/278
// - [CM64] Compute's Mapping the Commodore 64 - page 228
// - [RG64] C64 Programmers Reference Guide - page 277/278
// - [CM64] Computes Mapping the Commodore 64 - page 228
//
// CPU registers that has to be preserved (see [RG64]): .Y
//
@@ -46,3 +47,6 @@ chrin_getin: // jump entry for GETIN
// Not a supported device
jmp lvs_device_not_found_error
#endif // ROM layout
c64/kernal/iostack/f1ca.chrout.s
+7 -3
View File
@@ -1,9 +1,10 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// Official Kernal routine, described in:
//
// - [RG64] C64 Programmer's Reference Guide - page 278/279
// - [CM64] Compute's Mapping the Commodore 64 - page 228
// - [RG64] C64 Programmers Reference Guide - page 278/279
// - [CM64] Computes Mapping the Commodore 64 - page 228
//
// CPU registers that has to be preserved (see [RG64]): .Y
// Additionally we have to preserve .X for out CHRIN and implementation
@@ -15,7 +16,7 @@ CHROUT:
// Save X and Y values
// (Confirmed by writing a test program that X and Y
// don't get modified, in agreement with C64 PRG's
// do not get modified, in agreement with C64 PRG
// description of CHROUT)
phx_trash_a
@@ -74,3 +75,6 @@ chrout_done_success:
lda SCHAR
clc // indicate success
rts
#endif // ROM layout
c64/kernal/iostack/f20e.chkin.s
+6 -2
View File
@@ -1,9 +1,10 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// Official Kernal routines, described in:
//
// - [RG64] C64 Programmer's Reference Guide - page 275
// - [CM64] Compute's Mapping the Commodore 64 - page 229
// - [RG64] C64 Programmers Reference Guide - page 275
// - [CM64] Computes Mapping the Commodore 64 - page 229
//
// CPU registers that has to be preserved (see [RG64]): .Y, .A (see [CM64], page 213)
//
@@ -67,3 +68,6 @@ chkin_file_not_input:
ply_trash_a
pla
jmp kernalerror_FILE_NOT_INPUT
#endif // ROM layout
c64/kernal/iostack/f250.ckout.s
+4 -14
View File
@@ -1,9 +1,10 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// Official Kernal routines, described in:
//
// - [RG64] C64 Programmer's Reference Guide - page 276
// - [CM64] Compute's Mapping the Commodore 64 - page 229
// - [RG64] C64 Programmers Reference Guide - page 276
// - [CM64] Computes Mapping the Commodore 64 - page 229
//
// CPU registers that has to be preserved (see [RG64]): .Y, .A (see [CM64], page 213)
//
@@ -62,15 +63,4 @@ ckout_file_not_output:
jmp kernalerror_FILE_NOT_OUTPUT
#endif // ROM layout
c64/kernal/iostack/f291.close.s
+7 -3
View File
@@ -1,9 +1,10 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// Official Kernal routine, described in:
//
// - [RG64] C64 Programmer's Reference Guide - page 281/282
// - [CM64] Compute's Mapping the Commodore 64 - page 229/230
// - [RG64] C64 Programmers Reference Guide - page 281/282
// - [CM64] Computes Mapping the Commodore 64 - page 229/230
// - https://www.pagetable.com/?p=1031, https://github.com/mist64/cbmbus_doc (IEC command)
//
// CPU registers that has to be preserved (see [RG64]): none
@@ -51,7 +52,10 @@ close_remove_from_table:
// Decrement the list size variable
dec LDTND
clc // report success - not sure if original CLOSE does this, but it's nevertheless a good practice
clc // report success - not sure if original CLOSE does this, but it is nevertheless a good practice
close_end:
rts
#endif // ROM layout
c64/kernal/iostack/f32f.clall.jmp.s
+5
View File
@@ -1,6 +1,11 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
// Our implementation is longer than the original one,
// placing it here would cause a collision with CLRCHN
CLALL:
jmp clall_real
#endif // ROM layout
c64/kernal/iostack/f333.clrchn.s
+6 -2
View File
@@ -1,9 +1,10 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// Official Kernal routine, described in:
//
// - [RG64] C64 Programmer's Reference Guide - page 282
// - [CM64] Compute's Mapping the Commodore 64 - page 230
// - [RG64] C64 Programmers Reference Guide - page 282
// - [CM64] Computes Mapping the Commodore 64 - page 230
//
// CPU registers that has to be preserved (see [RG64]): .Y
//
@@ -30,3 +31,6 @@ clrchn_reset: // entry needed by setup_vicii
sta DFLTO
rts
#endif // ROM layout
c64/kernal/iostack/f34a.open.s
+7 -3
View File
@@ -1,9 +1,10 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// Official Kernal routine, described in:
//
// - [RG64] C64 Programmer's Reference Guide - page 289
// - [CM64] Compute's Mapping the Commodore 64 - page 230/231
// - [RG64] C64 Programmers Reference Guide - page 289
// - [CM64] Computes Mapping the Commodore 64 - page 230/231
//
// CPU registers that has to be preserved (see [RG64]): none
//
@@ -42,7 +43,7 @@ open_has_space:
// Update the tables
// LAT / FAT / SAT support implemented according to
// 'Compute's Mapping the Commodore 64', page 52
// 'Computes Mapping the Commodore 64', page 52
lda LA
sta LAT, y
@@ -76,3 +77,6 @@ open_done_success:
clc
rts
#endif // ROM layout
c64/kernal/iostack/f49e.load_prep.s
+4
View File
@@ -1,3 +1,4 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// LOAD preparation routine
@@ -21,3 +22,6 @@ LOAD_PREP:
sty MEMUSS+1
stx MEMUSS+0
jmp (ILOAD)
#endif // ROM layout
c64/kernal/iostack/f4a5.load.s
+7 -2
View File
@@ -1,8 +1,10 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// Official Kernal routine, described in:
//
// - [RG64] C64 Programmer's Reference Guide - page 286
// - [CM64] Compute's Mapping the Commodore 64 - page 231
// - [RG64] C64 Programmers Reference Guide - page 286
// - [CM64] Computes Mapping the Commodore 64 - page 231
// - IEC reference at http://www.zimmers.net/anonftp/pub/cbm/programming/serial-bus.pdf
//
// CPU registers that has to be preserved (see [RG64]): none
@@ -55,3 +57,6 @@ LOAD:
#endif
jmp lvs_illegal_device_number
#endif // ROM layout
c64/kernal/iostack/f5dd.save_prep.s
+4
View File
@@ -1,3 +1,4 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// SAVE preparation routine
@@ -27,3 +28,6 @@ SAVE_PREP:
sta STAL+0
jmp (ISAVE)
#endif // ROM layout
c64/kernal/iostack/f5ed.save.s
+6 -2
View File
@@ -1,9 +1,10 @@
#if ROM_LAYOUT_STD || (ROM_LAYOUT_M65 && SEGMENT_KERNAL_0)
//
// Official Kernal routine, described in:
//
// - [RG64] C64 Programmer's Reference Guide - page 293/294
// - [CM64] Compute's Mapping the Commodore 64 - page 231/232
// - [RG64] C64 Programmers Reference Guide - page 293/294
// - [CM64] Computes Mapping the Commodore 64 - page 231/232
// - IEC reference at http://www.zimmers.net/anonftp/pub/cbm/programming/serial-bus.pdf
//
// CPU registers that has to be preserved (see [RG64]): none
@@ -28,3 +29,6 @@ SAVE:
#endif
jmp lvs_illegal_device_number
#endif // ROM layout
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