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z80 disassembler, stopped invalid dd & fd instructions from eating the next byte [smf]

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smf- 2018-01-08 13:24:06 +00:00
parent e42176816b
commit 347396faed
1 changed files with 4 additions and 2 deletions
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6
src/devices/cpu/z80/z80dasm.cpp
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@ -420,9 +420,10 @@ offs_t z80_disassembler::disassemble(std::ostream &stream, offs_t pc, const data
case 0xdd: case 0xdd:
{ {
ixy = "ix"; ixy = "ix";
u8 op1 = opcodes.r8(pos++); u8 op1 = opcodes.r8(pos);
if( op1 == 0xcb ) if( op1 == 0xcb )
{ {
pos++;
offset = params.r8(pos++); offset = params.r8(pos++);
op1 = params.r8(pos++); op1 = params.r8(pos++);
d = &mnemonic_xx_cb[op1]; d = &mnemonic_xx_cb[op1];
@ -434,9 +435,10 @@ offs_t z80_disassembler::disassemble(std::ostream &stream, offs_t pc, const data
case 0xfd: case 0xfd:
{ {
ixy = "iy"; ixy = "iy";
u8 op1 = opcodes.r8(pos++); u8 op1 = opcodes.r8(pos);
if( op1 == 0xcb ) if( op1 == 0xcb )
{ {
pos++;
offset = params.r8(pos++); offset = params.r8(pos++);
op1 = params.r8(pos++); op1 = params.r8(pos++);
d = &mnemonic_xx_cb[op1]; d = &mnemonic_xx_cb[op1];