The AS8008S assembler supports the 8008 microprocessor using the early MCS-8 assembly language syntax of a Fortan based as- sembler/simulator (SIM-8) which had minimal lexical analysis. The instruction set contains a mnemonic for every variation of the basic instruction types. As an example the load accumulator operation has a mnemonic for load a with a (laa), load a with b (lab), load a with c (lac), load a with d (lad), load a with e (lae), load a with h (lah), and load a with l (lal).
8008 REGISTER SET
The following is a list of the 8008 registers used by AS8008S:
a - 8-bit accumulator
b,c,d,e,h,l - 8-bit registers
c,z,s,p - status word bits
8008 INSTRUCTION ADDRESSING MODES
The following tables list all 8008 mnemonics recognized by
the AS8008S assembler. The following list specifies the format
for each addressing mode supported by AS8008S:
Instruction Mnemonic Syntax:
r register a,b,c,d,e,h,l
c status bits c,z,s,p
M memory access
I immediate access
Instruction Argument Syntax:
#data immediate data
byte or word data
label call or jump label
MMM input/output port
The terms data, label, and MMM may all be expressions.
Note that not all addressing modes may be valid with every
instruction. Refer to the 8008 technical data for valid modes.
8008 INSTRUCTION SET
Register Instructions
Lrr
LrM LMr
LrI #data LMI #data
INr DCr
Accumulator Group
ADr ACr
SUr SBr
NDr XRr
ORr CPr
ADM ACM
SUM SBM
NDM XRM
ORM CPM
ADI #data ACI #data
SUI #data SBI #data
NDI #data XRI #data
ORI #data CPI #data
Rotate Instructions
RLC RRC
RAL RAR
Progarm Counter and Stack Control Instructions
JMP label
JFc label JTc label
CAL label
CFc label CTc label
RET
RFc RTc
RST
Input/Outpu Instructions
INP MMM OUT MMM
Machine Instruction
HLT
Combo Instruction
SHL #data (load H and L with word #data)
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