diff options
Diffstat (limited to 'runtime.S')
| -rw-r--r-- | runtime.S | 13 |
1 files changed, 13 insertions, 0 deletions
@@ -369,6 +369,8 @@ m68k_read_byte_scratch1: jbe cart_b cmp $0xE00000, %ecx jae workram_b + cmp $0xC00000, %ecx + jae vdp_psg_b cmp $0xA10000, %ecx jb not_io_b cmp $0xA12000, %ecx @@ -378,6 +380,17 @@ not_io_b: xor %cl, %cl dec %cl ret +vdp_psg_b: + test $0x2700E0, %ecx + jnz crash + and $0x1F, %ecx + bt $0, %ecx + jnc vdp_swap + jmp do_vdp_port_read +vdp_swap: + call do_vdp_port_read + shr $8, %cx + ret workram_b: /* deal with byte swapping */ xor $1, %ecx |