gc80c510 CORERIVER Semiconductor, gc80c510 Datasheet - Page 134
![no-image](/images/no-image-200.jpg)
gc80c510
Manufacturer Part Number
gc80c510
Description
Eprom/rom 8-bit Turbo Microcontrollers
Manufacturer
CORERIVER Semiconductor
Datasheet
1.GC80C510.pdf
(211 pages)
- Current page: 134 of 211
- Download datasheet (947Kb)
Operation:
Encoding:
Cycles:
Bytes:
BCD variables can be incremented or decremented by adding 01h or 99h. If the
Accumulator initially holds 30h (representing the digits of 30 decimal), then the
instruction sequence,
ADD
DA
will leave the carry set and 29h in the Accumulator, since 30 + 99 = 129. The
low-order byte of the sum can be interpreted to mean 30 – 1 = 29.
1
1
DA
- contents of Accumulator are BCD
IF
IF
1
1
A, #99h
A
{[(A
THEN
{[(A
THEN
0
3-0
7-4
1
) > 9]
) > 9]
(A
AND
(A
0 1 0 0
3-0
7-4
Page 134 of 211
∨
∨
)
)
←
←
[(AC) = 1]}
[(C) = 1]}
(A
(A
3-0
7-4
) + 6
) + 6
Appendix A: Instruction Set
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