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Parallax Instruction Chart

The chart below lists all of the Parallax instructions, their operands, number of program words, instruction cycles, and side effects.

Keep this information handy as you write and debug programs. Some of the most difficult bugs to locate and eliminate are those caused by:

You can squash these bugs before they bite by keeping a copy of the chart close at hand while you program. For example, if you plan to use one of the skip instructions, make sure that the instruction to be skipped is one program word long.

You can also use the chart to help you calculate the time required for your code to execute. Just add the number of program cycles for each instruction. This can get a little tricky within loops, so I frequently cheat and use the PSIM simulator to do my counting for me.
 
 
Instruction Operands Words Cycles Affects
ADD fr, #literal 2 2 C, DC, Z
  fra, frb 2 2 C, DC, Z
  fr, W 1 1 C, DC, Z
  W, fr 1 1 C, DC, Z
ADDB fr, bit 2 2 Z
AND fr, #literal 2 2 W, Z
  fra, frb 2 2 W, Z
  fr, W 1 1 Z
  W, #literal 1 1 Z
  W, fr 1 1 Z
CALL addr8 1 2 none
CJA fr, #literal, addr9 4 4/5 C, DC, Z
  fr1, fr2, addr9 4 4/5 C, DC, Z
CJAE fr, #literal, addr9 4 4/5 C, DC, Z
  fr1, fr2, addr9 4 4/5 C, DC, Z
CJB fr, #literal, addr9 4 4/5 C, DC, Z
  fr1, fr2, addr9 4 4/5 C, DC, Z
CJBE fr, #literal, addr9 4 4/5 C, DC, Z
  fr1, fr2, addr9 4 4/5 C, DC, Z
CJE fr, #literal, addr9 4 4/5 C, DC, Z
  fr1, fr2, addr9 4 4/5 C, DC, Z
CJNE fr, #literal, addr9 4 4/5 C, DC, Z
  fr1, fr2, addr9 4 4/5 C, DC, Z
CLC none 1 1 C
CLR fr 1 1 Z
CLR W 1 1 Z
CLR WDT 1 1 TO, PD
CLRB bit 1 1 none
CLZ none 1 1 Z
CSA fr, #literal 3 3/4 C, DC, Z
  fr1, fr2 3 3/4 C, DC, Z
CSAE fr, #literal 3 3/4 C, DC, Z
  fr1, fr2 3 3/4 C, DC, Z
CSB fr, #literal 3 3/4 C, DC, Z
  fr1, fr2 3 3/4 C, DC, Z
CSBE fr, #literal 3 3/4 C, DC, Z
  fr1, fr2 3 3/4 C, DC, Z
CSE fr, #literal 3 3/4 C, DC, Z
  fr1, fr2 3 3/4 C, DC, Z
CSNE fr, #literal 3 3/4 C, DC, Z
  fr1, fr2 3 3/4 C, DC, Z
DEC fr 1 1 Z
DECSZ fr 1 1/2 none
DJNZ fr, addr9 2 2/3 none
IJNZ fr, addr9 2 2/3 none
INC fr 1 1 Z
INCSZ fr 1 1/2 none
JB bit, addr9 2 2/3 none
JC addr9 2 2/3 none
JMP addr9 1 2 none
JMP PC+W 1 2 C, DC, Z
JMP W 1 2 none
JNB bit, addr9 2 2/3 none
JNC addr9 2 2/3 none
JNZ addr9 2 2/3 none
JZ addr9 2 2/3 none
LCALL addr11 1-3 2-4 none
LJMP addr11 1-3 2-4 none
LSET addr11 0-2 0-2 none
MOV fr, #literal 2 2 none
  fr1, fr2 2 2 Z
  fr, W 1 1 none
  Option, #literal 2 2 none
  Option, fr 2 2 Z
  Option, W 1 1 none
  !port_fr, #literal 2 2 none
  !port_fr, fr 2 2 Z
  !port_fr, W 1 1 none
  W, #literal 1 1 none
  W, fr 1 1 Z
  W, /fr 1 1 Z
  W, fr-W 1 1 C, DC, Z
  W, ++fr 1 1 Z
  W, --fr 1 1 Z
  W, <<fr 1 1 C
  W, >>fr 1 1 C
  W, <>fr 1 1 none
MOVB bit1, bit2 4 4 none
  bit1, /bit2 4 4 none
MOVSZ W, ++fr 1 1/2 none
  W, --fr 1 1/2 none
NEG fr 2 2 Z
NOP none 1 1 none
NOT fr 1 1 Z
  W 1 1 Z
OR fr, #literal 2 2 Z
  fr1, fr2 2 2 Z
  fr, W 1 1 Z
  W, #literal 1 1 Z
  W, fr 1 1 Z
RET none 1 2 none
RETW literal1, literal2... ? 2 per none
RL fr 1 1 C
RR fr 1 1 C
SB bit 1 1/2 none
SC none 1 1/2 none
SETB bit 1 1 none
SKIP none 1 2 none
SLEEP none 1 1 TO, PD
SNB bit 1 1/2 none
SNC none 1 1/2 none
SNZ none 1 1/2 none
STC none 1 1 C
STZ none 1 1 Z
SUB fr, #literal 2 2 C, DC, Z
  fr1, fr2 2 2 C, DC, Z
  fr, W 1 1 C, DC, Z
SUBB fr, bit 2 2 Z
SWAP fr 1 1 none
SZ none 1 1/2 none
TEST fr 1 1 Z
TEST W 1 1 Z
XOR fr, #literal 2 2 Z
  fr1, fr2 2 2 Z
  fr, W 1 1 Z
  W, #literal 1 1 Z
  W, fr 1 1 Z

 
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