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Implement op -0x7f (turning point!)

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This commit is contained in:
Takashi Toyoshima 2014-12-06 23:29:28 +09:00
parent 428c8b54c5
commit 34f60ed8b6
1 changed files with 48 additions and 30 deletions
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6502.S
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@ -462,6 +462,14 @@ op64:
op67:
op6b:
op6f:
op72:
op73:
op74:
op77:
op7a:
op7b:
op7c:
op7f:
_nop
_decode
@ -823,39 +831,49 @@ op6e: // ROR - Absolute
_toAddr
_decode
op70:
b quit
op71:
b quit
op72:
b quit
op73:
b quit
op74:
b quit
op75:
b quit
op76:
b quit
op77:
b quit
op70: // BVS (V==1)
movs r0, #FLAG_V
tst SR, r0
beq 1f
_bxx
1:
_decode
op71: // ADC - (Indirect), Y
_fromIndirectIndex
_adc
_decode
op75: // ADC - Zero Page, X
_fromZeroIndex RX
_adc
_decode
op76: // ROR - Zero Page, X
_fromZeroIndex RX
_ror
_toAddr
_decode
op78: // SEI
_sex FLAG_I
_decode
op79:
b quit
op7a:
b quit
op7b:
b quit
op7c:
b quit
op7d:
b quit
op7e:
b quit
op7f:
b quit
op79: // ADC - Absolute, Y
_fromAbsoluteIndexed RY
_adc
_decode
op7d: // ADC - Absolute, X
_fromAbsoluteIndexed RX
_adc
_decode
op7e: // ROR - Absolute, X
_fromAbsoluteIndexed RX
_ror
_decode
op80:
b quit
op81: