X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=Pico%2FMemory.s;h=7e16384921758a2a038690ee19398e8c2e9f48c3;hb=b542be4686241c9e0722ff8e452980f9ac2b4d7c;hp=88b8c43e118aa0e3d48fb202ff91cd6d58841762;hpb=7969166ef66a8623cb4d8c609eb6e67314aefd79;p=picodrive.git

diff --git a/Pico/Memory.s b/Pico/Memory.s
index 88b8c43..7e16384 100644
--- a/Pico/Memory.s
+++ b/Pico/Memory.s
@@ -10,6 +10,7 @@
 .include "port_config.s"
 
 .text
+.align 4
 
 @ default jump tables
 
@@ -119,6 +120,7 @@ m_read32_def_table:
 @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
 
 .bss
+.align 4
 @.section .bss, "brw"
 @.data
 
@@ -136,6 +138,7 @@ m_read32_table:
 @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
 
 .text
+.align 4
 
 .global PicoMemReset
 .global PicoRead8
@@ -184,7 +187,7 @@ PicoMemReset:
     @ update memhandlers according to ROM size
     ldr     r1, =m_read8_above_rom
     ldr     r0, =m_read8_table
-    mov     r2, #16
+    mov     r2, #20
 1:
     sub     r2, r2, #1
     cmp     r2, r12
@@ -196,7 +199,7 @@ PicoMemReset:
 2:
     ldr     r1, =m_read16_above_rom
     ldr     r0, =m_read16_table
-    mov     r2, #16
+    mov     r2, #20
 1:
     sub     r2, r2, #1
     cmp     r2, r12
@@ -208,7 +211,7 @@ PicoMemReset:
 2:
     ldr     r1, =m_read32_above_rom
     ldr     r0, =m_read32_table
-    mov     r2, #16
+    mov     r2, #20
 1:
     sub     r2, r2, #1
     cmp     r2, r12
@@ -383,17 +386,14 @@ m_read8_misc2:
     cmp     r2, #0x4000
     mvnne   r0, #0
     bxne    lr                @ invalid
-.if EXTERNAL_YM2612
     ldr     r1, =PicoOpt
     ldr     r1, [r1]
     tst     r1, #1
-    beq     m_read8_fake_ym2612
-    tst     r1, #0x200
-    beq     YM2612Read_
-    b       YM2612Read_940
-.else
-    b       YM2612Read_
-.endif
+
+    ldrne   r1, =ym2612_st
+    ldrne   r1, [r1]
+    ldrneb  r0, [r1, #0x11]   @ ym2612_st->status
+    bxne    lr
 
 m_read8_fake_ym2612:
     ldr     r3, =(Pico+0x22200)
@@ -435,6 +435,19 @@ m_read8_ram:
     bx      lr
 
 m_read8_above_rom:
+    @ might still be SRam (Micro Machines, HardBall '95)
+    ldr     r2, =(SRam)
+    ldr     r3, =(Pico+0x22200)
+    ldr     r1, [r2, #8]    @ SRam.end
+    cmp     r0, r1
+    bgt     m_read8_ar_nosram
+    ldr     r1, [r2, #4]    @ SRam.start
+    cmp     r0, r1
+    blt     m_read8_ar_nosram
+    ldrb    r1, [r3, #0x11] @ Pico.m.sram_reg
+    tst     r1, #5
+    bne     SRAMRead
+m_read8_ar_nosram:
     stmfd   sp!,{r0,lr}
     bic     r0, r0, #1
     mov     r1, #8
@@ -566,7 +579,24 @@ m_read16_ram:
     bx      lr
 
 m_read16_above_rom:
+    @ might still be SRam
+    ldr     r2, =(SRam)
+    ldr     r3, =(Pico+0x22200)
+    ldr     r1, [r2, #8]    @ SRam.end
     bic     r0, r0, #1
+    cmp     r0, r1
+    bgt     m_read16_ar_nosram
+    ldr     r1, [r2, #4]    @ SRam.start
+    cmp     r0, r1
+    blt     m_read16_ar_nosram
+    ldrb    r1, [r3, #0x11] @ Pico.m.sram_reg
+    tst     r1, #5
+    beq     m_read16_ar_nosram
+    stmfd   sp!,{lr}
+    bl      SRAMRead
+    orr     r0, r0, r0, lsl #8
+    ldmfd   sp!,{pc}
+m_read16_ar_nosram:
     mov     r1, #16
     b       OtherRead16End
 
@@ -623,7 +653,7 @@ m_read32_rom4: @ 0x200000 - 0x27ffff, SRAM area (does any game do long reads?)
     add     r0, r1, #2
     bl      SRAMRead
     ldmfd   sp!,{r1,lr}
-    orr     r0, r1, r0, lsl #16
+    orr     r0, r0, r1, lsl #16
     orr     r0, r0, r0, lsl #8
     bx      lr
 m_read32_nosram:
@@ -861,7 +891,8 @@ m_write8_z80_not_ram:
     ldr     r2, =emustatus
     ldmfd   sp!,{lr}
     ldr     r1, [r2]
-    orr     r1, r0, r2
+    and     r0, r0, #1
+    orr     r1, r0, r1
     str     r1, [r2]         @ emustatus|=YM2612Write(a&3, d);
     bx      lr