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IEC support is now optional

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FeralChild64 committed 2019-10-31 17:33:30 +01:00
1 parent c03c7abf45
commit 65c27f4dd4
12 files changed
+64 -36
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CONFIG.md
+8
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@@ -95,6 +95,14 @@ Uses RAM under BASIC, I/O and KERNAL, takes over `$C000`-`$CFFF` area requires s
Comparing to standard memoryy model, it needs about 180 bytes in BASIC segment and 80 bytes in KERNAL segment - at the moment of doing the test, these values are expected to change often.
## I/O devices
### `CONFIG_IEC`
Adds support for the IEEC bus - for serial printers, disk drives, etc.
Needs over 1000 bytes in KERNAL segment. If unsure - enable.
## Multiple SID support
The SID is a sound chip - original machine had one installed. However, mods exists to add more of them for improved sound capabilitiee. Emulators and FPGA machines typically allow to simulate more than one too. Unfortunately, there is no standard regarding how these additional chips are visible in the processor address space, and there is no sane way to detect it - thus, it has to be configurable.
c64/,,config_generic.s
+1 -1
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@@ -40,7 +40,7 @@
// I/O devices
#define CONFIG_IEC // please keep enabled for now
#define CONFIG_IEC
// #define CONFIG_IEC_JIFFYDOS // please keep disabled for now
// #define CONFIG_TAPE_NORMAL // please keep disabled for now
// #define CONFIG_TAPE_TURBO // please keep disabled for now
c64/,,config_mega65.s
+1 -1
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@@ -42,7 +42,7 @@
// I/O devices
#define CONFIG_IEC // please keep enabled for now
#define CONFIG_IEC
// #define CONFIG_IEC_JIFFYDOS // please keep disabled for now
// #define CONFIG_TAPE_NORMAL // please keep disabled for now
// #define CONFIG_TAPE_TURBO // please keep disabled for now
c64/,,config_testing.s
+1 -1
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@@ -41,7 +41,7 @@
// I/O devices
#define CONFIG_IEC // please keep enabled for now
#define CONFIG_IEC
// #define CONFIG_IEC_JIFFYDOS // please keep disabled for now
// #define CONFIG_TAPE_NORMAL // please keep disabled for now
// #define CONFIG_TAPE_TURBO // please keep disabled for now
c64/,,config_ultimate64.s
+1 -1
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@@ -40,7 +40,7 @@
// I/O devices
#define CONFIG_IEC // please keep enabled for now
#define CONFIG_IEC
// #define CONFIG_IEC_JIFFYDOS // please keep disabled for now
// #define CONFIG_TAPE_NORMAL // please keep disabled for now
// #define CONFIG_TAPE_TURBO // please keep disabled for now
c64/kernal/iec/iec_send_file_name.s
+41
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@@ -0,0 +1,41 @@
//
// Sends file (stream) name to IEC device
//
#if CONFIG_IEC
iec_send_file_name:
ldy #0
iec_send_file_name_loop:
cpy FNLEN
beq iec_send_file_name_done
#if CONFIG_MEMORY_MODEL_60K
ldx #<FNADDR+0
jsr peek_under_roms
#else // CONFIG_MEMORY_MODEL_38K
lda (FNADDR),y
#endif
iny
// Set Carry flag on the last file name character, to mark EOI
cpy FNLEN
clc
bne !+
sec
!:
// Transmit one character
sta TBTCNT
jsr iec_tx_byte
jmp iec_send_file_name_loop
iec_send_file_name_done:
jsr UNLSN
rts
#endif // CONFIG_IEC
c64/kernal/iec/load_iec.s
+1 -1
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@@ -45,7 +45,7 @@ load_iec:
bcs load_iec_dev_not_found
// Send file name
jsr lvs_send_file_name
jsr iec_send_file_name
bcs load_iec_error
// Now command device to talk (p16)
c64/kernal/iec/open_iec.s
+1 -1
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@@ -30,7 +30,7 @@ open_iec:
#endif
// Send command ('file name')
jsr lvs_send_file_name
jsr iec_send_file_name
open_iec_done:
c64/kernal/iec/save_iec.s
+1 -1
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@@ -24,7 +24,7 @@ save_iec:
bcs // XXX error
// Send file name
jsr lvs_send_file_name
jsr iec_send_file_name
bcs load_iec_error
// XXX finish the implementation
c64/kernal/init/fda3.ioinit.s
+7 -1
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@@ -111,7 +111,13 @@ IOINIT:
lda #%00000011
sta CIA2_PRA
rts
#if CONFIG_IEC
// Set IEC bus to its initial idle state
jmp iec_set_idle
#else
rts
#endif
c64/kernal/iostack/f1ca.chrout.s
+1 -1
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@@ -37,7 +37,7 @@ CHROUT:
#if CONFIG_IEC
jsr iec_check_devnum_oc
bcc_far chrout_iec
#if CONFIG_IEC
#endif
// FALLTROUGH
c64/kernal/iostack/lvs_helpers.s
-27
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@@ -3,33 +3,6 @@
// Helper functions for various LOAD/VERIVY/SAVE routine variants (IEC / U64 / etc.)
//
lvs_send_file_name:
ldy #0
lvs_send_file_name_loop:
cpy FNLEN
beq lvs_send_file_name_done
#if CONFIG_MEMORY_MODEL_60K
ldx #<FNADDR+0
jsr peek_under_roms
#else // CONFIG_MEMORY_MODEL_38K
lda (FNADDR),y
#endif
iny
// Set Carry flag on the last file name character, to mark EOI
cpy FNLEN
clc
bne !+
sec
!:
// Transmit one character
sta TBTCNT
jsr iec_tx_byte
jmp lvs_send_file_name_loop
lvs_send_file_name_done:
jsr UNLSN
rts
lvs_handle_byte_load_verify: