gc80c510 CORERIVER Semiconductor, gc80c510 Datasheet - Page 151
gc80c510
Manufacturer Part Number
gc80c510
Description
Eprom/rom 8-bit Turbo Microcontrollers
Manufacturer
CORERIVER Semiconductor
Datasheet
1.GC80C510.pdf
(211 pages)
- Current page: 151 of 211
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JZ
MiDAS1.1 Family
Description:
rel
Operation:
Encoding:
Function:
Example:
Cycles:
Bytes:
Jump if Accumulator Zero
If all bits of the Accumulator are zero, branch to the address indicated;
otherwise proceed with the next instruction. The branch destination is computed
by adding the signed relative-displacement in the second instruction byte to the
PC, after incrementing the PC twice. The Accumulator is not modified. No flags
are affected.
The Accumulator originally contains 01h. The instruction sequence,
JZ
DEC A
JZ
will change the Accumulator to 00h and cause program execution to continue at
the instruction identified by the label LABEL2.
2
3
JNZ
(PC)
IF (A) = 0
0
THEN (PC)
←
1
LABEL1
LABEL2
(PC) + 2
1
0
←
0 0 0 0
(PC) + rel
Page 151 of 211
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