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https://github.com/RaySollium99/picodrive.git
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mcd, preparations for msu support
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kub
parent
178a9b683c
commit
02ff025479
15 changed files with 153 additions and 170 deletions
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@ -51,7 +51,7 @@
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.global PicoWriteS68k16_dec_m2b1
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@ externs, just for reference
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.extern Pico
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.extern Pico_mcd
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.extern cdc_host_r
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.extern m68k_reg_write8
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.extern s68k_reg_read16
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@ -130,9 +130,9 @@ PicoReadM68k8_cell1: @ 0x220000 - 0x23ffff, cell arranged
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mov r3, #0x0e0000
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0:
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cell_map
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PIC_LDR(r1, r2, Pico)
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PIC_LDR(r1, r2, Pico_mcd)
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add r0, r0, r3
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ldr r1, [r1, #OFS_Pico_rom] @ Pico.mcd (used everywhere)
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ldr r1, [r1] @ Pico.mcd (used everywhere)
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eor r0, r0, #1
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ldrb r0, [r1, r0]
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bx lr
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@ -143,9 +143,9 @@ PicoRead8_mcd_io:
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cmp r1, #0x2000 @ a120xx?
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bne PicoRead8_io
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PIC_LDR(r1, r2, Pico)
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PIC_LDR(r1, r2, Pico_mcd)
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and r0, r0, #0x3f
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ldr r1, [r1, #OFS_Pico_rom] @ Pico.mcd
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ldr r1, [r1] @ Pico.mcd
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cmp r0, #0x0e
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PIC_XB(lt ,r0, lsl #2)
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b m_m68k_read8_hi
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@ -242,9 +242,9 @@ PicoReadM68k16_cell1: @ 0x220000 - 0x23ffff, cell arranged
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mov r3, #0x0e0000
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0:
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cell_map
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PIC_LDR(r1, r2, Pico)
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PIC_LDR(r1, r2, Pico_mcd)
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add r0, r0, r3
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ldr r1, [r1, #OFS_Pico_rom] @ Pico.mcd
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ldr r1, [r1] @ Pico.mcd
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bic r0, r0, #1
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ldrh r0, [r1, r0]
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bx lr
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@ -256,9 +256,9 @@ PicoRead16_mcd_io:
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bne PicoRead16_io
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m_m68k_read16_m68k_regs:
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PIC_LDR(r1, r2, Pico)
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PIC_LDR(r1, r2, Pico_mcd)
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and r0, r0, #0x3e
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ldr r1, [r1, #OFS_Pico_rom] @ Pico.mcd
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ldr r1, [r1, @ Pico.mcd
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cmp r0, #0x0e
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PIC_XB(lt ,r0, lsl #1)
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b m_m68k_read16_hi
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@ -333,9 +333,9 @@ PicoWriteM68k8_cell1: @ 0x220000 - 0x23ffff, cell arranged
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0:
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mov r3, r1
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cell_map
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PIC_LDR(r2, r1, Pico)
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PIC_LDR(r2, r1, Pico_mcd)
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add r0, r0, r12
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ldr r2, [r2, #OFS_Pico_rom] @ Pico.mcd
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ldr r2, [r2] @ Pico.mcd
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ldr r2, [r2]
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eor r0, r0, #1
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strb r3, [r2, r0]
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@ -361,9 +361,9 @@ PicoWriteM68k16_cell1: @ 0x220000 - 0x23ffff, cell arranged
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0:
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mov r3, r1
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cell_map
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PIC_LDR(r1, r2, Pico)
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PIC_LDR(r1, r2, Pico_mcd)
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add r0, r0, r12
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ldr r1, [r1, #OFS_Pico_rom] @ Pico.mcd
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ldr r1, [r1] @ Pico.mcd
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bic r0, r0, #1
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strh r3, [r1, r0]
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bx lr
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@ -403,9 +403,9 @@ PicoReadS68k8_dec0: @ 0x080000 - 0x0bffff
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PicoReadS68k8_dec1:
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mov r3, #0x0a0000 @ + ^ / 2
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0:
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PIC_LDR(r2, r1, Pico)
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PIC_LDR(r2, r1, Pico_mcd)
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eor r0, r0, #2
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ldr r2, [r2, #OFS_Pico_rom] @ Pico.mcd
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ldr r2, [r2] @ Pico.mcd
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movs r0, r0, lsr #1 @ +4-6 <<16
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add r2, r2, r3 @ map to our address
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ldrb r0, [r2, r0]
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@ -435,8 +435,8 @@ m_s68k_read8_regs:
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bx lr
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m_s68k_read8_comm:
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PIC_LDR(r1, r2, Pico)
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ldr r1, [r1, #OFS_Pico_rom] @ Pico.mcd
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PIC_LDR(r1, r2, Pico_mcd)
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ldr r1, [r1] @ Pico.mcd
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add r1, r1, #0x110000
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ldrb r1, [r1, r0]
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bic r0, r0, #1
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@ -448,9 +448,9 @@ m_s68k_read8_pcm:
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bne m_read_null
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@ must not trash r3 and r12
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PIC_LDR(r1, r2, Pico)
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PIC_LDR(r1, r2, Pico_mcd)
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bic r0, r0, #0xff0000
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ldr r1, [r1, #OFS_Pico_rom] @ Pico.mcd
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ldr r1, [r1] @ Pico.mcd
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mov r2, #0x110000
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orr r2, r2, #0x002200
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cmp r0, #0x2000
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@ -483,9 +483,9 @@ PicoReadS68k16_dec0: @ 0x080000 - 0x0bffff
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PicoReadS68k16_dec1:
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mov r3, #0x0a0000 @ + ^ / 2
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0:
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PIC_LDR(r2, r1, Pico)
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PIC_LDR(r2, r1, Pico_mcd)
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eor r0, r0, #2
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ldr r2, [r2, #OFS_Pico_rom] @ Pico.mcd
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ldr r2, [r2] @ Pico.mcd
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mov r0, r0, lsr #1 @ +4-6 <<16
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add r2, r2, r3 @ map to our address
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ldrb r0, [r2, r0]
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@ -513,9 +513,9 @@ m_s68k_read16_regs:
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.macro m_s68k_write8_2M_decode
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PIC_LDR(r2, ip, Pico)
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PIC_LDR(r2, ip, Pico_mcd)
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eor r0, r0, #2
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ldr r2, [r2, #OFS_Pico_rom] @ Pico.mcd
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ldr r2, [r2] @ Pico.mcd
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movs r0, r0, lsr #1 @ +4-6 <<16
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add r2, r2, r3 @ map to our address
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.endm
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@ -597,9 +597,9 @@ m_s68k_write8_pcm:
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bxlt lr
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m_s68k_write8_pcm_ram:
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PIC_LDR(r3, r2, Pico)
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PIC_LDR(r3, r2, Pico_mcd)
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bic r0, r0, #0x00e000
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ldr r3, [r3, #OFS_Pico_rom] @ Pico.mcd
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ldr r3, [r3] @ Pico.mcd
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mov r0, r0, lsr #1
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add r2, r3, #0x110000
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add r2, r2, #0x002200
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@ -615,9 +615,9 @@ m_s68k_write8_pcm_ram:
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.macro m_s68k_write16_2M_decode
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PIC_LDR(r2, ip, Pico)
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PIC_LDR(r2, ip, Pico_mcd)
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eor r0, r0, #2
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ldr r2, [r2, #OFS_Pico_rom] @ Pico.mcd
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ldr r2, [r2] @ Pico.mcd
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mov r0, r0, lsr #1 @ +4-6 <<16
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add r2, r2, r3 @ map to our address
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.endm
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@ -696,9 +696,9 @@ m_s68k_write16_regs:
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bne s68k_reg_write16
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m_s68k_write16_regs_spec: @ special case
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PIC_LDR(r2, r0, Pico)
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PIC_LDR(r2, r0, Pico_mcd)
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mov r0, #0x110000
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ldr r2, [r2, #OFS_Pico_rom] @ Pico.mcd
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ldr r2, [r2] @ Pico.mcd
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add r0, r0, #0x00000f
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strb r1, [r2, r0] @ if (a == 0xe) s68k_regs[0xf] = d;
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bx lr
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