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HPC Instruction Set Description (Continued)
Mnemonic Description Action
BIT INSTRUCTIONS
SBIT Set bit 1
x
Membit
RBIT Reset bit 0
x
Membit
IFBIT If bit If Membit is true do next instr
MEMORY TRANSFER INSTRUCTIONS
LD Load MemI
x
MA
Load incrdecr X Mem(X)
x
A X
g
1 (or 2)
x
X
ST Store to Memory A
x
Mem
X Exchange A
Mem
Exchange incrdecr X A
Mem(X) X
g
1 (or 2)
x
X
PUSH Push Memory to Stack W
x
W(SP) SP
a
2
x
SP
POP Pop Stack to Memory SP
b
2
x
SP W(SP)
x
W
LDS Load A incrdecr B Mem(B)
x
A B
g
1 (or 2)
x
B
Skip on condition Skip next if B greaterless than K
XS Exchange incrdecr B Mem(B)
A B
g
1 (or 2)
x
B
Skip on condition Skip next if B greaterless than K
REGISTER LOAD IMMEDIATE INSTRUCTIONS
LD B Load B immediate imm
x
B
LD K Load K immediate imm
x
K
LD X Load X immediate imm
x
X
LD BK Load B and K immediate imm
x
B imm
x
K
ACCUMULATOR AND C INSTRUCTIONS
CLR A Clear A 0
x
A
INC A Increment A A
a
1
x
A
DEC A Decrement A A
b
1
x
A
COMP A Complement A 1’s complement of A
x
A
SWAP A Swap nibbles of A A
1512
w
A
118
w
A
74
A
30
RRC A Rotate A right thru C C
x
A15
x
x
A0
x
C
RLC A Rotate A left thru C C
w
A15
w
w
A0
w
C
SHR A Shift A right 0
x
A15
x
x
A0
x
C
SHL A Shift A left C
w
A15
w
w
A0
w
0
SC SetC 1
x
C
RC Reset C 0
x
C
IFC IF C Do next if C
e
1
IFNC IF not C Do next if C
e
0
TRANSFER OF CONTROL INSTRUCTIONS
JSRP Jump subroutine from table PC
x
W(SP)SP
a
2
x
SP
W(table
)
x
PC
JSR Jump subroutine relative PC
x
W(SP)SP
a
2
x
SPPC
a
x
PC
(
is
a
1025 to
b
1023)
JSRL Jump subroutine long PC
x
W(SP)SP
a
2
x
SPPC
a
x
PC
JP Jump relative short PC
a
x
PC(
is
a
32 to
b
31)
JMP Jump relative PC
a
x
PC(
is
a
257 to
b
255)
JMPL Jump relative long PC
a
x
PC
JID Jump indirect at PC
a
APC
a
A
a
1
x
PC
JIDW then Mem(PC)
a
PC
x
PC
NOP No Operation PC
a
1
x
PC
RET Return SP
b
2
x
SPW(SP)
x
PC
RETSK Return then skip next SP
b
2
x
SPW(SP)
x
PC skip
RETI Return from interrupt SP
b
2
x
SPW(SP)
x
PC interrupt re-enabled
Note W is 16-bit word of memory
MA is Accumulator A or direct memory (8-bit or 16-bit)
Mem is 8-bit byte or 16-bit word of memory
MemI is 8-bit or 16-bit memory or 8-bit or 16-bit immediate data
imm is 8-bit or 16-bit immediate data
imm8 is 8-bit immediate data only
For details of memory usage by each instruction see The HPC User’s Manual
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