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Added SEx and CLx

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This commit is contained in:
Ivan Izaguirre 2019-01-29 00:00:37 +01:00
parent 964f5bc3be
commit 858d6acac5
2 changed files with 74 additions and 0 deletions
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59
execute.go
View File

@ -150,6 +150,56 @@ func buildOpLoad(addressMode int, regDst int) opFunc {
}
}
func buildOpUpdateFlag(flag uint8, value bool) opFunc {
return func(s *state, line []uint8, opcode opcode) {
s.registers.updateFlag(flag, value)
}
}
/*
TODO:
ADC
SBC
AND
ORA
ASL
EOR
LSR
BIT
CMP
CPX
CPY
BRK
BCC
BCS
BEQ
BMI
BPL
BVC
BVS
JMP
JSR
RTI
RTS
PHA
PHP
PLA
PLP
STA
STX
STY
*/
var opcodes = [256]opcode{
0x2A: opcode{"ROL", 1, 2, buildRotate(modeAccumulator, true)},
0x26: opcode{"ROL", 2, 5, buildRotate(modeZeroPage, true)},
@ -163,6 +213,15 @@ var opcodes = [256]opcode{
0x6E: opcode{"ROR", 3, 6, buildRotate(modeAbsolute, false)},
0x7E: opcode{"ROR", 3, 7, buildRotate(modeAbsoluteX, false)},
0x38: opcode{"SEC", 1, 2, buildOpUpdateFlag(flagC, true)},
0xF8: opcode{"SED", 1, 2, buildOpUpdateFlag(flagD, true)},
0x78: opcode{"SEI", 1, 2, buildOpUpdateFlag(flagI, true)},
0x18: opcode{"CLC", 1, 2, buildOpUpdateFlag(flagC, false)},
0xD8: opcode{"CLD", 1, 2, buildOpUpdateFlag(flagD, false)},
0x58: opcode{"CLI", 1, 2, buildOpUpdateFlag(flagI, false)},
0xB8: opcode{"CLV", 1, 2, buildOpUpdateFlag(flagV, false)},
0xE6: opcode{"INC", 2, 5, buildOpIncDec(modeZeroPage, true)},
0xF6: opcode{"INC", 2, 6, buildOpIncDec(modeZeroPageX, true)},
0xEE: opcode{"INC", 3, 6, buildOpIncDec(modeAbsolute, true)},

15
execute_test.go
View File

@ -168,5 +168,20 @@ func TestRotate(t *testing.T) {
if !s.registers.getFlag(flagC) {
t.Errorf("Error in ROR carry")
}
}
func TestClearSetFlag(t *testing.T) {
var s state
s.registers.setP(0x00)
executeLine(&s, []uint8{0xF8})
if !s.registers.getFlag(flagD) {
t.Errorf("Error in SED. %v", s.registers)
}
executeLine(&s, []uint8{0xD8})
if s.registers.getFlag(flagD) {
t.Errorf("Error in CLD. %v", s.registers)
}
}