User Manual

Instruction
Instruction
Size
(Bytes)
CPU
Cycles
Required Description
PUSH #literal 2 4 Push 8-bit literal value [0 to 255]
PUSHPOP 1 5 Pop from return stack, push to data stack
POPPUSH 1 5 Pop from data stack, push to return stack
PUSH [DSP][-D]
POP [DSP][-D]
1 5 Push / pop DSP modified by D
EA = BP + DSP – displacement [1 to 8]
PUSHD #literal 3 6 Push 16-bit literal value, high byte first
PUSHD [PTR] 1 6 Push from 16-bit pointer [0 to 3], high byte
first
POPD [PTR] 1 6 Pop to 16-bit pointer [0 to 3], low byte first
PUSH [PTR][TOS]
POP [PTR][TOS]
1 6 Push / pop 16-bit pointer [0 to 3], modified
by TOS
EA = (16-bit pointer) + TOS.
PUSH [PTR][D]
POP [PTR][D]
2 7 Push / pop 16-bit pointer [0 to 3], modified
by D
EA = (16-bit pointer) + displacement [0 to
255]
PUSH absolute
POP absolute
3 7 Push / pop absolute memory address
Note: EA = Effective Address.
Table 10. Arithmetic and Logic Instructions
Instruction
Instruction
Size
(Bytes)
CPU
Cycles
Required Description
INC
DEC
NOT
1 2 Increment TOS
Decrement TOS
Negate TOS
ROLC
RORC
1 2 Rotate left TOS through carry
Rotate right TOS through carry
SHL
SHR
1 2 Unsigned left shift TOS, clear carry
Unsigned right shift TOS, clear carry
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