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cd: rewrite pcm

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This commit is contained in:
notaz 2013-09-19 03:51:30 +03:00
parent d0132772f7
commit 33be04ca5f
7 changed files with 171 additions and 160 deletions
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18
pico/cd/memory_arm.s
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@ -56,6 +56,8 @@
.extern s68k_poll_detect
.extern gfx_cd_read
.extern gfx_cd_write16
.extern pcd_pcm_write
.extern pcd_pcm_read
.extern PicoCpuCS68k
.extern PicoRead8_io
.extern PicoRead16_io
@ -447,23 +449,15 @@ m_s68k_read8_pcm:
@ must not trash r3 and r12
ldr r1, =(Pico+0x22200)
bic r0, r0, #0xff0000
@ bic r0, r0, #0x008000
ldr r1, [r1]
mov r2, #0x110000
orr r2, r2, #0x002200
cmp r0, #0x2000
bge m_s68k_read8_pcm_ram
cmp r0, #0x20
movlt r0, #0
bxlt lr
orr r2, r2, #(0x48+8) @ pcm.ch + addr_offset
add r1, r1, r2
and r2, r0, #0x1c
ldr r1, [r1, r2, lsl #2]
tst r0, #2
moveq r0, r1, lsr #PCM_STEP_SHIFT
movne r0, r1, lsr #(PCM_STEP_SHIFT+8)
and r0, r0, #0xff
movge r0, r0, lsr #1
bge pcd_pcm_read
mov r0, #0
bx lr
m_s68k_read8_pcm_ram:
@ -600,7 +594,7 @@ m_s68k_write8_pcm:
bic r0, r0, #0xff0000
cmp r0, #0x12
movlt r0, r0, lsr #1
blt pcm_write
blt pcd_pcm_write
cmp r0, #0x2000
bxlt lr