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Implemented DJNZ.

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This commit is contained in:
Thomas Harte 2017-05-25 21:44:24 -04:00
parent bdf07c3dc9
commit 82017c4aea
1 changed files with 14 additions and 1 deletions
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15
Processors/Z80/Z80.hpp
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@ -125,6 +125,8 @@ struct MicroOp {
SetInstructionPage,
CalculateIndexAddress,
DJNZ,
None
};
Type type;
@ -346,7 +348,8 @@ template <class T> class Processor: public MicroOpScheduler<MicroOp> {
DEC_INC_DEC_LD(bc_, bc_.bytes.low),
/* 0x0f RRCA */ Program({MicroOp::RRCA}),
/* 0x10 DJNZ */ XX, /* 0x11 LD DE, nn */ Program(FETCH16(de_, pc_)),
/* 0x10 DJNZ */ Program(WAIT(1), FETCH(temp8_, pc_), {MicroOp::DJNZ}, WAIT(5), {MicroOp::CalculateIndexAddress, &pc_.full}, {MicroOp::Move16, &temp16_.full, &pc_.full}),
/* 0x11 LD DE, nn */ Program(FETCH16(de_, pc_)),
/* 0x12 LD (DE), A */ Program(STOREL(a_, de_)),
/* 0x13 INC DE; 0x14 INC D; 0x15 DEC D; 0x16 LD D, n */
@ -607,6 +610,16 @@ template <class T> class Processor: public MicroOpScheduler<MicroOp> {
#undef set_parity
#pragma mark - Relative jumps
case MicroOp::DJNZ:
bc_.bytes.high--;
if(!bc_.bytes.high) {
move_to_next_program();
checkSchedule();
}
break;
#pragma mark - 8-bit arithmetic
case MicroOp::CP8: {