Quick assembler question

[Tezz]

Hi all,

 

I have a few small coding questions:

 

I am of course these days using Fox's great XASM which makes coding via the PC a nice experience although, I'm not totally familiar yet with the Quick Assembler as I used to use the very old Atari Assembler back then as I never got a MAC65 cartridge. There are a few differences with the syntax which I am now familiarising myself with. As well as trying to remember all of the 6502 that I once knew!

 

After looking through some XASM sourcecode, I was wondering about this command:

 

ror @ <---- I assume that this is (as the documentation states) marked with the @ as it is the accumulator addressing mode?

 

Can someone clarify exactly what this is doing?

 

Here is an example of a section of code

SETPOS	LDA $84

SEC 

SBC $B7

STA $84

AND #$03

STA $86

LDA $84

AND #$FC

CLC 

ror @

ror @

ADC $82

STA $8A

LDA $83

ADC #$00

STA $8B

LDA $85

AND #$07

STA $87

LDA $85

AND #$F8

CLC 

ror @

ror @

ror @

TAX 

CPX #$00

BEQ SETPOS2

SETPOS1	CLC 

LDA $8A

ADC #$30

STA $8A

LDA $8B

ADC #$00

STA $8B

DEX 

BNE SETPOS1

 

also, another very basic question.. in my old source code I could deifine bytes by..

 

LABEL

.byte $70,$70,$70

etc.

 

I have tried to replace this with..

LABEL

dta b $70,$70,$70

etc.

 

XASM compains that a label hasn't been defined on the line that contains the first dta b

 

should I just use

dta $70,$70,$70

 

As always, Any help is appreciated.

[Thomas Jentzsch]

Yes, it looks like 'ror @' means 'ror a' or simply 'ror'.

 

BTW:

   CLC 

  ror @ 

  ror @ 

  ror @

That's a perfect example of the programmer not knowing exactly what the opcode does and which opcodes are available too. Instead he could have written:

   lsr @ 

  ror @ 

  ror @

I have seen this mistake quite often in old code, probably the 650x documentation wasn't very complete.

[Tezz]

Thanks Thomas, I thought it was just me!

[dely]

LABEL

.byte $70,$70,$70

etc.

 

Quick Asm:

label dta b($70),b($70),b($70)

 

XASM:

label dta b($70,$70,$70)

[Tezz]

dly XASM:  

Code:  

 

label dta b($70,$70,$70)

Thanks for that. I thought it'd be something like that.

 

Cheers :wink:

[dely]

Cheers  :wink:

In Poland we used to say "Po szklanie i na rusztowanie"

[Dracon]

:wink:

[Tezz]

dely In Poland we used to say "Po szklanie i na rusztowanie"

OK ! In my Polish to English translator, this comes out as... "For (after) glass and on rusztowanie"

 

anyway.. Okrzyki ! for your help :wink:

[Tezz]

Some more help if possible..

 

I'm just now using Code Genie front end for XASM and have set-up the config file as Fox describes in the documentation. For some reason it's not generating the object file?

 

In the output window, I get "Running xasm.exe /p" and my path and source file is then listed correctly after this.

 

I then get "Process terminated successfully."

"Exit code 3"

 

And no object file is created??

 

the xasm.exe executable is in the same directory as code genie

 

Any ideas what I am doing wrong?

[Heaven/TQA]

do not know... but one problem i have discovered in the past was that code genie was configured in unix mode and not dos mode regarding CR/line end maybe this is causing the problem?

 

have you checked a dummy XASM program like putting simple colours on screen etc? just to see if the assembling works correctly?

 

will the object file being generated when using xasm manually?

[Tezz]

Thanks Heaven, I worked it out. It seems that either XASM has a limit to the path length to compile from or that one of my folder names had a space in it (I never normally do this ). I copied my whole Code-Genie/XASM folder to the raw C drive path and it works fine now.

[dely]

Any ideas what I am doing wrong?

 

I have following setup:

 

Code Genie is in:

 

D:EmuAtariXEUtil-PC-CGCode Genie 3.0>

 

Xasm is in:

 

D:EmuAtariXEUtil-PC-CG>

 

Also in above directory i have x-asm.bat. With following content:

 

d:emuAtariXEUtil-PC-CGxasm.exe %1 /l /o:blah.xex

 

In cgenie.conf i have following content:

 

AddUserTool Xasm D:emuAtarixeutil-pc-cgx-asm.bat $FP CaptureOutput

 

This works fine