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1992-05-06
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199 lines
AS6502(5) UNIX Programmer's Manual AS6502(5)
NNNNNNAAAAAAMMMMMMEEEEEE
as6502 - assembler for MOS Technology 650X microprocessors
SSSSSSYYYYYYNNNNNNOOOOOOPPPPPPSSSSSSIIIIIISSSSSS
aaaaaassssss666666555555000000222222 [ option ] [ parameters] file ...
DDDDDDEEEEEESSSSSSCCCCCCRRRRRRIIIIIIPPPPPPTTTTTTIIIIIIOOOOOONNNNNN
_A_s_6_5_0_2 assembles the named files and produces a listing on
the standard output. Available options are:
------iiiiii ignore .nlst pseudo ops in the source file.
------llllll produce only an error listing on the standard output.
------nnnnnn print address in normal <high byte><low byte> format,
rather than split <low byte>:<high byte> format.
------oooooo generate the ASCII object file 666666555555000000222222......oooooouuuuuutttttt...... The per-line
format of that file is:
;<address low byte><address high byte><data>...
------ssssss print symbol table at the end of the assembly listing.
------mmmmmm Causes the object file to be output in standard MOS
Technology format. This option implys -o.
Parameters:
Parameters consist of an option character followed by a
value. The value may follow with or without whitespace.
All values are decimal numbers. Available parameters
are:
------tttttt Specify the size of the symbol table. The default is
20000 bytes. Values less than 1000 are not accepted.
------pppppp Specify the number of lines per page. This does not
include the heading. The heading uses an additional 4
lines. The default is 60, which gives 3 blank lines
between pages on a 66 line page (1 line at the top and 2
lines at the bottom). A form feed precedes the head-
ings. Specifying 0 for page size results in no heading
at all.
------wwwwww Specify the number of characters per line on the listing
file. The default is 132. The minimum allowed is 80
and the maximum is 133.
Symbol conventions:
Up to 19 alphanumeric (a-z | A-Z | 0-9 | . | _) charac-
ters, with initial character non-numeric.
Asterisk (*) is symbolic name of the location counter.
Printed 12/18/86 12/11/86 1
AS6502(5) UNIX Programmer's Manual AS6502(5)
Op code mnemonics (upper and/or lower case):
ADC BIT BVS CPX INC LDX PHP RTI SEI TAY
AND BMI CLC CPY INX LDY PLA RTS STA TSX
ASL BNE CLD DEC INY LSR PLP SBC STX TXA
BCC BPL CLI DEX JMP NOP ROL SEC STY TXS
BCS BRK CLV DEY JSR ORA ROR SED TAX TYA
BEQ BVC CMP EOR LDA PHA
Pseudo op mnemonics:
= equate label to operand value.
*= equate location counter to operand value.
.WORD assign 16 bit operand value to next 2 locations.
.DBYT assign 16 bit value to next 2 locations, reverse.
.BYTE assign 8 bit operand value to next location.
.NLST turn listing mode off.
.LIST turn listing mode on.
.PAGE start a new listing page. A title enclosed in ""
is optional. The title must be small enough to fit in
the heading line.
Constant types:
% binary number prefix.
@ or 0 octal number prefix.
$ hexadecimal number prefix.
' ASCII character prefix.
" ASCII character string prefix and suffix.
default (leading digit 1 through 9) decimal number.
Operand field operators:
+ addition ^ logical exclusive OR
- subtraction ~ logical 1's comple-
ment
/ integer division $ logical AND
* multiplication | logical OR
% modulo < low byte
> high byte
FFFFFFIIIIIILLLLLLEEEEEESSSSSS
/BIN/as6502 the assembler
6502.out object (with -o option)
SSSSSSEEEEEEEEEEEE AAAAAALLLLLLSSSSSSOOOOOO
J. H. Van Ornum, "as6502 User Notes"
DDDDDDIIIIIIAAAAAAGGGGGGNNNNNNOOOOOOSSSSSSTTTTTTIIIIIICCCCCCSSSSSS
File handling diagnostics:
Invalid argument count - as6502 invoked without a source
file or with too many source files.
Open error for file <name> - as6502 cannot open source file.
Create error (6502.out) - as6502 cannot create object file.
Close error - as6502 cannot close the source file.
Close error (6502.out) - as6502 cannot close object file.
Assembly error diagnostics:
Symbol table full - symbol table overflowed allotted space.
Printed 12/18/86 12/11/86 2
AS6502(5) UNIX Programmer's Manual AS6502(5)
Number of symbols is a function of symbol sizes.
Label multiply defined - symbol defined more than once.
Sync error - the pass 2 value of symbol in the label field
is different than the pass 1 value.
Invalid operation code - op code mnemonic is invalid.
Operand field missing - the op code mnemonic requires an
operand, and none was found.
Invalid operand field - operand field contains an operator
which is not recognized by as6502.
Invalid branch address - branch instruction to a location
which is out of range.
Invalid addressing mode - tried to use an addressing mode
which is not available to the operation code.
Operand field size error - operand is larger than hex FF.
Undefined symbol in operand field - a symbol in the operand
field never appeared in the label field.
BBBBBBUUUUUUGGGGGGSSSSSS
Printed 12/18/86 12/11/86 3