chris/open-roms
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more work on new memory models

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FeralChild64 committed 2020-06-24 21:48:39 +02:00
1 parent 6a4fe4d180
commit 21f2f52571
27 files changed
+279 -133
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c64/kernal/memory/under_rom_routines_46k_50k.s
+85
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@@ -0,0 +1,85 @@
// #LAYOUT# STD * #TAKE
// #LAYOUT# * KERNAL_0 #TAKE
// #LAYOUT# * * #IGNORE
#if CONFIG_MEMORY_MODEL_46K ||CONFIG_MEMORY_MODEL_50K
peek_under_roms_via_MEMUSS:
// Store current memory mapping, unmap BASIC ROM
lda CPU_R6510
pha
and #$FE
sta CPU_R6510
// Retrieve value from under ROMs
lda (MEMUSS), y
// FALLTROUGH
peek_under_roms_finalize:
// Store value in a safe place
tax
// Restore memory mapping
pla
sta CPU_R6510
// Retrieve value and quit
txa
rts
peek_under_roms_via_FNADDR:
// Store current memory mapping, unmap BASIC ROM
lda CPU_R6510
pha
and #$FE
sta CPU_R6510
// Retrieve value from under ROMs
lda (FNADDR), y
// Continue using common code
#if HAS_OPCODES_65C02
bra peek_under_roms_finalize
#else
jmp peek_under_roms_finalize
#endif
peek_under_roms_via_EAL:
// Store current memory mapping, unmap BASIC ROM
lda CPU_R6510
pha
and #$FE
sta CPU_R6510
// Retrieve value from under ROMs
lda (EAL), y
// Continue using common code
#if HAS_OPCODES_65C02
bra peek_under_roms_finalize
#else
jmp peek_under_roms_finalize
#endif
#endif
c64/kernal/memory/under_rom_routines.s → c64/kernal/memory/under_rom_routines_60k.s
+1 -80
View File
@@ -3,86 +3,7 @@
// #LAYOUT# * * #IGNORE
#if CONFIG_MEMORY_MODEL_46K ||CONFIG_MEMORY_MODEL_50K
peek_under_roms_MEMUSS:
// Store current memory mapping, unmap BASIC ROM
lda CPU_R6510
pha
and #$FE
sta CPU_R6510
// Retrieve value from under ROMs
lda (MEMUSS), y
// FALLTROUGH
peek_under_roms_finalize:
// Store value in a safe place
tax
// Restore memory mapping
pla
sta CPU_R6510
// Retrieve value and quit
txa
rts
peek_under_roms_FNADDR:
// Store current memory mapping, unmap BASIC ROM
lda CPU_R6510
pha
and #$FE
sta CPU_R6510
// Retrieve value from under ROMs
lda (FNADDR), y
// Continue using common code
#if HAS_OPCODES_65C02
bra peek_under_roms_finalize
#else
jmp peek_under_roms_finalize
#endif
peek_under_roms_EAL:
// Store current memory mapping, unmap BASIC ROM
lda CPU_R6510
pha
and #$FE
sta CPU_R6510
// Retrieve value from under ROMs
lda (EAL), y
// Continue using common code
#if HAS_OPCODES_65C02
bra peek_under_roms_finalize
#else
jmp peek_under_roms_finalize
#endif
#elif CONFIG_MEMORY_MODEL_60K
#if CONFIG_MEMORY_MODEL_60K
// IMPORTANT: