RaySollium99/picodrive
1
0
Fork 0
mirror of https://github.com/RaySollium99/picodrive.git synced 2025-09-05 15:27:46 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

new z80 scheduling method, timers are still wip

Browse source 
git-svn-id: file:///home/notaz/opt/svn/PicoDrive@459 be3aeb3a-fb24-0410-a615-afba39da0efa
This commit is contained in:
notaz 2008-05-25 21:25:46 +00:00
parent 170435846c
commit 4b9c588826
15 changed files with 377 additions and 364 deletions
Download patch file Download diff file Expand all files Collapse all files

24
Pico/Memory.s
View file

@ -879,27 +879,21 @@ m_write8_z80_not_ram:
and r2, r0, #0x6000
cmp r2, #0x4000
bne m_write8_z80_not_ym2612
ldr r2, =PicoOpt
ldr r3, =PicoOpt
and r0, r0, #3
ldr r2, [r2]
tst r2, #1
ldr r3, [r3]
mov r2, #0 @ is_from_z80 = 0
tst r3, #1
bxeq lr
stmfd sp!,{lr}
.if EXTERNAL_YM2612
tst r2, #0x200
ldreq r2, =YM2612Write_
ldrne r2, =YM2612Write_940
mov lr, pc
bx r2
.else
bl YM2612Write_
.endif
and r1, r1, #0xff
bl ym2612_write_local
ldr r2, =emustatus
ldmfd sp!,{lr}
ldr r1, [r2]
and r0, r0, #1
orr r1, r0, r1
str r1, [r2] @ emustatus|=YM2612Write(a&3, d);
str r1, [r2] @ emustatus|=ym2612_write_local(a&3, d);
bx lr
m_write8_z80_not_ym2612: @ not too likely
@ -916,7 +910,7 @@ m_write8_z80_not_ym2612: @ not too likely
m_write8_z80_bank_reg:
ldr r3, =(Pico+0x22208) @ Pico.m
ldrh r2, [r3, #0x0a]
mov r1, r1, lsr #8
mov r1, r1, lsl #8
orr r2, r1, r2, lsr #1
bic r2, r2, #0xfe00
strh r2, [r3, #0x0a]
@ -932,7 +926,7 @@ m_write8_not_z80:
bne OtherWrite8
m_write8_psg:
ldr r2, =PicoOpt
mov r0, r1
and r0, r1, #0xff
ldr r2, [r2]
tst r2, #2
bxeq lr