45111 Datasheet, PDF (129/184 Pages) List of Unclassifed Manufacturers – 14-DAY MONEY BACK GUARANTEE

13 Appendix C: SX Instruction Set
CSBE op1, op2
Compare op1 to op2 and skip if below or equal
Command
1) CSBE fr, #literal
2) CSBE fr1, fr2
Words
3
3
Cycles
3 or 4 (skip)
(12 or 16)
3 or 4 (skip)
(12 or 16)
Affects
W, C, DC, Z
W, C, DC, Z
Coding
1100 kkkk kkkk MOV W, #lit^$FF
0001 110f ffff ADD W, fr
0110 0000 0011 SNC
0010 000f ffff MOV W, fr1
0000 100f ffff MOV W, fr2-W
0111 0000 0011 SC
Operation: op1 is compared to op2. If op1 is less than or equal to op2, the following instruction word is skipped. W
is left holding the result of op1 + ~op2 in command #1 and op2 - op1 in command #2. If CARRYX is
specified, c affects the result. Insert a CLC before command #1 and an STC before command #2 to avoid strange
results.
Note:
Only one word is skipped by this instruction. To avoid strange results, make sure that any instruction
following CSBE is a single-word instruction.
CSE op1, op2
Compare op1 to op2 and skip if equal
Command
1) CSE fr, #literal
2) CSE fr1, fr2
Words
3
3
Cycles
3 or 4 (skip)
(12 or 16)
3 or 4 (skip)
(12 or 16)
Affects
W, C, DC, Z
W, C, DC, Z
Coding
1100 kkkk kkkk MOV W, #lit
0000 100f ffff MOV W, fr-W
0111 0100 0011 SZ
0010 000f ffff MOV W, fr2
0000 100f ffff MOV W, fr1-W
0111 0100 0011 SZ
Operation: op1 is compared to op2. If op1 is equal to op2, the following instruction word is skipped. W is left
holding the result of op1 - op2. If CARRYX is specified, c affects the result. Insert an STC before command to
avoid strange results.
Note:
Only one word is skipped by this instruction. To avoid strange results, make sure that any instruction
following CSE is a single-word instruction.
SX-Key/Blitz Development System Manual 2.0 • Parallax, Inc. • Page 129