Motorola MC6805R Series User Manual

Table 10-5. Control Instructions
Inherent
Op
# #
Function Mnemonic
Code
Bytes Cycles
Transfer A to X TAX 97 1 2
Transfer X to A TXA 9F
1 2
Set Carry Bit
SEC 99
1
2
Clear Carry Bit
CLC 98
1
2
Set Interrupt Mask Bit
SEI 9B
1
2
Clear Interrupt Mask Bit CLI 9A 1
2
Software Interrupt SWI 83 1 11
Return from Subroutine RTS 81 1
6
Return from Interrupt RTI 80 1
9
Reset Stack Pointer
RSP
9C
1
2
No-Operation
NOP
9D 1
2
Table 10-6. Instruction Set (Sheet 1 of 2)
Addressing Modes
I
Bit
I
Indexed
Indexed Indexed
Setl
I
~Mneml
Inherent' Immediate
Direct Extended
Relative
(No Offset) (8 Bits)
(16 Bits)
Clear
ADC
X
ADD
X
AND
X
ASL
X
ASR X
BCC
BCLR
BCS
BEQ
BHCC
BHCS
BHI
BHS
BIH
BIL
BIT
X
BLO
BLS
BMC
BMI
BMS
BNE
BPL
BRA
Condition Code
Symbols:
H Half Carry (From Bit 3)
I Interrupt Mask
N Negative
(Sign Bit)
Z Zero
X
X
I
X
X
X
X
X X
X
X
X
X
X
X
X
X
X
·X X
X
X
X
X
X
X
X
X
X
X X
X
X
X
X
X
X
X
X
X
C Carry/Borrow
/\ Test and Set if True, Cleared Otherwise
•
Not Affected
10-8
X
X
X
X
X
iCondition Codel
Bit
I
Test &
!
Branch H I
N Z
C I
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•
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Motorola MC6805R Series Specifications

General

Brand	Motorola
Model	MC6805R Series
Category	Computer Hardware
Language	English