6502 Command Code Chart

6502 COMMAND CODE CHART
By GEOFF CORRY

A

B

C

D

E

F

0

BRK

      1(,)

0

ORA

2(A)

1

ORA

2(E)

5

ASL

2(F)

6

PHP

1(H)

8

ORA

2(I)

9

ASL

1(J)

10

ORA

3(M)

13

ASL

3(N)

14

1

BLP

      2(P)

16

ORA

2(Q)

17

ORA

2(U)

21

ASL

2(V)

22

CLC

1(X)

24

ORA

3(Y)

25

ORA

3(=)

29

ASL

3(+)

30

2

JSR

      3 SB

32

AND

2 !

33

BIT

2 $

36

AND

2 %

37

ROL

2 &

38

PLP

1 (

40

AND

2 )

41

ROL

1 *

42

BIT

3 ,

44

AND

3 -

45

ROL

3 .

46

3

BMI

1 0

48

AND

2 1

49

AND

2 5

53

ROL

2 6

54

SEC

1 8

56 

AND

3 9

57

AND

3 =

61

4

RTI

1 @

64

EOR

2 A

65

EOR

2 E

69

LSR

2 F

70

PHA

1 H

72

EOR

2 I

73

LSR

1 J

74

JMP

3 L

76

EOR

3 M

77

LSR

3 N

78

5

BVC

2 P

80

EOR

2 Q

81

EOR

2 U

85

LSR

2 V

86

CLI

1 X

88

EOR

3 Y

89

EOR

3 ]

93

LSR

3 ^

94

6

RTS

      1(.)

96

ADC

2 a

97

ADC

2 @

101

ROR

2 f

102

PLA

1 h

104

ADC

2 i

105

ROR

2 j

106

JMP

3 l

108

ADC

3 m

109

ROR

3 n

110

7

BVS

2 p

112

ADC

2 cq

113

ADC

2 u

117

ROR

2 v

110

SEI

1 x

120

ADC

3 y

121

ADC

3(<)

125

ROR

      Note3

126

8

STY

2(D)

132

STA

2(E)

133

STX

2(F)

134

DEY

1(H)

136

TXA

1(J)

138

STY

3(L)

140

STA

3(M)

141

STX

3(N)

142

9

BCC

      2(P)

144

STA

2(Q)

145

STY

2(T)

148

STA

2(U)

149

STX

2(V)

150

TYA

1(X)

152

STA

3(Y)

153

TXS

1(Z)

154

STA

      Note4

157

A

LDY

      2 SB

160

LDA

2 !

161

LDX

2 "

162

LDY

2 $

164

LDA

2 %

165

LDX

2 &

166

TAY

1 (

168

LDA

2 %

169

TAX

1 *

170

LDY

3 ,

172

LDA

3 -

173

LDX

3 .

174

B

BCS

1 0

176

LDA

2 1

177

LDY

2 4

180

LDA

2 5

181

LDX

2 6

182

CLV

1 8

184

LDA

3 9

185

TSX

1 :

186

LDY

3 <

188

LDA

3 =

189

LDX

3 >

190

C

CPY

2 @

192

CMP

2 A

193

CPY

2 D

196

CMP

2 E

197

DEC

2 F

198

INY

1 H

200

CMP

2 I

201

DEX

1 J

202

CMP

3 M

205

DEC

3 N

206

D

BNE

2 P

208

CMP

2 Q

209

CMP

2 U

213

DEC

2 V

214

CLD

1 X

216

CMP

3 Y

217

CMP

3 ]

221

DEC

3 ^

222

E

CPX

2(,)

224

SBC

2 a

225

CPX

2 d

228

SBC

2 e

229

INC

2 f

230

INX

1 h

232

SBC

2 i

233

NOP

1 j

234

CPX

3 l

236

SBC

3 m

237

INC

3 n

238

F

BEQ

1 p

240

SBC

2 q

241

SBC

2 u

245

INC

2 v

246

SED

1 x

248

SBC

3 y

249

SBC

      Note5

253

INC

      Note5

254

NOTES:-

1. The first number under the command code indicates the number of bytes associated with the assembler command.

2. The next symbol under the command code is the ATASCII code for that command. Those with brackets indicate the CTRL fnctn. i.e:- (P) means CTRL(P). Those with underlines indicate inverse video. i.e. D indicates inverse video D.

3. The character used for command code ROR, absolute X mode and size 3 bytes at location 7E(dec. 126) is ESC(bksp).

4. The character used for code STA, absolute 8 Node and size 3 bytes, at hex location 9D(dec. 157) is ESC<insert).

5. The characters required for command codes SBC and INC, both absolute R modes and size 3 bytes at hex locations FD and FE are ESC(ctrl 2) and ESC(ctrl bksp) respectively.

6. The character at location 2 0 is the (space bar). At A 0, the character required for LDY is the inverse(space bar).