tgtakaoka / libasm Goto Github PK

Improve error reporting.

• More precise errorAt() reporting.
• Translate error number to text message.

Command line interface should display much descriptive error message than just a number.
And listing file should be generated even there is an error.

• "TFM D,X+" is tokenized as "D,X" and "+"
• "OIM #$20,W,X" is tokenized as "#$20" and ",W" and ",X"

Thank you for your time and effort on this project.

I give you shout-out on my INS8073 blog page at [https://8073sbc.wordpress.com/2021/07/27/additional-tids-and-bits-to-add/]

I think the features suggested in the title would be a great enhancement to the dissassembler in CLI mode.

Peace and blessings,
JQ

The release works fine on x86 and arm, but due to unknown bugs in libasm related to PROGMEM, it would not work on AVR architecture.

Using libasm as wasm backend to provide assembler and disassembler web interface.

Currently test/gen command can generate fairly good auto-generated test assemble source for 8-bit CPU. Since 16-bit CPU's instruction usually has multiple bit-fields, scanning by simply incrementing instruction "value" doesn't work well. Need to find a good way to

• find bit-fields in instruction code
• iterate multiple bit-fields
• omit similar test cases which might appear not consecutively.

Compiling Arduino example code targeting for ARM/Arduino spits a lot of compiler warning about dereferencing type-punned pointer.
pgm_read_byte, pgm_read_word, pgm_read_otr #define macro in config_host.h are the cause. And table_base.h should also be fixed.

6800 Assembler correctly accepts

LDA A #$01
LDA A,#$02
LDAA  #$03
LDA B #$04
LDA B,#$05
LDAB  #$06

but also wrongly accepts

LDA   #$07

as ```LDAA``.
This should be an error.

Is it possible to do math in mediate constants?

For example take the low or high bytes from a label's address.
In 6502
lda # high byte of 'return'
sta some high byte vector location
lda# low byte of 'return'
sta some low byte vector location
etc

.return RTI

In the BBC Micro BASIC's build in 6502 assembler I would use
LDA # return DIV 256
LDA # return MOD 256

I would also find it useful if asm could generate c header file like this. Probably the prefix string 'at' could be a parameter.
const unsigned char atFFE0[] =
{
0xFF, 0xFE, 0xFD, 0xFC, 0xFB, 0xFA, 0xF9, 0xF8, 0xF7, 0xF6, 0xF5
};

Also '-' as a file name for 'use std out' would be handy to pipeline the processing of the hex file output for example.

Excellent work though, looking forward to using ins8060 and ins8070 modes.

Currently only 0~15 of 8-bit register address specified as assembler operand are converted to work register Rn or @rn.
we must support SETDP or ASSUME RP:nn directive.

Supporting early 16bit DSP seems interesting.

The libasm disassembler should support ELF format as it's input, probably with a relocation table support.

After release 1.6.29, libasm assembler command line interface asm doesn't properly handle assembler directives.
Such as FCB in 6502.

See the change comment of d083fbe568.

Hi Professor
I have a tmp96c141 processor.
How can I write code for this processor with your library in the Arduino environment?
please guide me . I really need coding for tmp96c141 from the tlcs 900 family!
Thank.
mail: [email protected]

• More attractive README.md
• TUTORIAL.md
• ARDUINO.md

Report from https://github.com/electrickery

My target is the TMS70C02 processor. This is what seems to work:

For constants, libasm seems to use C-type presentations

Directives:
ORG
INCLUDE "assemblyHeader.asm"
EQU
DATA

Constant presentations:
%>0B immediate hex number
%0x0B immediate hex number
%0b01010101 immediate binary number
%!123 immediate 'not 123'
%030 immediate decimal number

In EQU declarations the 'nnnh' presentation is supported, but not in constants
used in code mnemonics.
The '*' comment character is supported but only as the first,
non-space character on the line

Bytes in memory use the DATA PseudoOp, text requires single quotes:
MSG_USAGE DATA CR, LF, 'H - this help text', CR, LF, PRMPT, EOL

It would be great if libasm generate ELF format file as an output binary with a relocation table.