Supported 65816 instructions

Due to legacy from xkas, Asar's MVN and MVP instructions are backwards from most other assemblers: the syntax is MVN dest, src. Also, a 16-bit argument like MVN $ssdd (where $ss is source, $dd is destination) is accepted too (edit: not in asar2 it isn't).

All other instructions use syntax recommended by WDC, with some additional liberties:

• for accumulator-addressed instructions (inc a etc), the a argument can be omitted.
• cop, brk and wdm are assembled as 2-byte instructions, with with the second byte being optional and defaulting to zero.

ADC #$00
ADC #$0000
ADC $00
ADC $00,s
ADC $00,x
ADC $0000
ADC $0000,x
ADC $0000,y
ADC $000000
ADC $000000,x
ADC ($00)
ADC ($00),y
ADC ($00,s),y
ADC ($00,x)
ADC [$00]
ADC [$00],y
AND #$00
AND #$0000
AND $00
AND $00,s
AND $00,x
AND $0000
AND $0000,x
AND $0000,y
AND $000000
AND $000000,x
AND ($00)
AND ($00),y
AND ($00,s),y
AND ($00,x)
AND [$00]
AND [$00],y
ASL $00
ASL $00,x
ASL $0000
ASL $0000,x
ASL A
BCC $00
BCS $00
BEQ $00
BIT #$00
BIT #$0000
BIT $00
BIT $00,x
BIT $0000
BIT $0000,x
BMI $00
BNE $00
BPL $00
BRA $00
BRK
BRK #$00
BRL $0000
BVC $00
BVS $00
CLC
CLD
CLI
CLV
CMP #$00
CMP #$0000
CMP $00
CMP $00,s
CMP $00,x
CMP $0000
CMP $0000,x
CMP $0000,y
CMP $000000
CMP $000000,x
CMP ($00)
CMP ($00),y
CMP ($00,s),y
CMP ($00,x)
CMP [$00]
CMP [$00],y
COP
COP #$00
CPX #$00
CPX #$0000
CPX $00
CPX $0000
CPY #$00
CPY #$0000
CPY $00
CPY $0000
DEC $00
DEC $00,x
DEC $0000
DEC $0000,x
DEC A
DEX
DEY
EOR #$00
EOR #$0000
EOR $00
EOR $00,s
EOR $00,x
EOR $0000
EOR $0000,x
EOR $0000,y
EOR $000000
EOR $000000,x
EOR ($00)
EOR ($00),y
EOR ($00,s),y
EOR ($00,x)
EOR [$00]
EOR [$00],y
INC $00
INC $00,x
INC $0000
INC $0000,x
INC A
INX
INY
JML $000000
JML [$0000]
JMP $0000
JMP ($0000)
JMP ($0000,x)
JSL $000000
JSR $0000
JSR ($0000,x)
LDA #$00
LDA #$0000
LDA $00
LDA $00,s
LDA $00,x
LDA $0000
LDA $0000,x
LDA $0000,y
LDA $000000
LDA $000000,x
LDA ($00)
LDA ($00),y
LDA ($00,s),y
LDA ($00,x)
LDA [$00]
LDA [$00],y
LDX #$00
LDX #$0000
LDX $00
LDX $00,y
LDX $0000
LDX $0000,y
LDY #$00
LDY #$0000
LDY $00
LDY $00,x
LDY $0000
LDY $0000,x
LSR $00
LSR $00,x
LSR $0000
LSR $0000,x
LSR A
MVN $00,$00
MVN $0000
MVP $00,$00
MVP $0000
NOP
ORA #$00
ORA #$0000
ORA $00
ORA $00,s
ORA $00,x
ORA $0000
ORA $0000,x
ORA $0000,y
ORA $000000
ORA $000000,x
ORA ($00)
ORA ($00),y
ORA ($00,s),y
ORA ($00,x)
ORA [$00]
ORA [$00],y
PEA $0000
PEI ($00)
PER $0000
PHA
PHB
PHD
PHK
PHP
PHX
PHY
PLA
PLB
PLD
PLP
PLX
PLY
REP #$00
ROL $00
ROL $00,x
ROL $0000
ROL $0000,x
ROL A
ROR $00
ROR $00,x
ROR $0000
ROR $0000,x
ROR A
RTI
RTL
RTS
SBC #$00
SBC #$0000
SBC $00
SBC $00,s
SBC $00,x
SBC $0000
SBC $0000,x
SBC $0000,y
SBC $000000
SBC $000000,x
SBC ($00)
SBC ($00),y
SBC ($00,s),y
SBC ($00,x)
SBC [$00]
SBC [$00],y
SEC
SED
SEI
SEP #$00
STA $00
STA $00,s
STA $00,x
STA $0000
STA $0000,x
STA $0000,y
STA $000000
STA $000000,x
STA ($00)
STA ($00),y
STA ($00,s),y
STA ($00,x)
STA [$00]
STA [$00],y
STP
STX $00
STX $00,y
STX $0000
STY $00
STY $00,x
STY $0000
STZ $00
STZ $00,x
STZ $0000
STZ $0000,x
TAX
TAY
TCD
TCS
TDC
TRB $00
TRB $0000
TSB $00
TSB $0000
TSC
TSX
TXA
TXS
TXY
TYA
TYX
WAI
WDM
WDM #$00
XBA
XCE