A downloadable cross-compiler for Windows

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Welcome to Pas 6502, the home of my Pascal cross-compiler targeting 6502-based machines.

It currently supports these machines:

  • C64
  • C128
  • Vic-20
  • Commodore PET
  • BBC Micro
  • Atari 8-bit
  • Apple II family
  • Oric Family (Oric-1, Oric-16k, Oric Atmos, Pravetz)
  • NES (Very minimal support currently...)

NOTE if you make a fun/interesting program with Pas6502 and you want to share it, let me know and I'll add it to the examples! ❤️❤️

PREREQUISITES!!: Needs a Java Runtime Environment at a minimum (see readme file).

Kick Assembler (the assembler) & exomizer (packing program)is already included in the download...

You can download the readme help file separately to peruse before using the tool, but it is included with Pas6502 too.

NOTE: make sure to save your projects before compiling them just in case the compiler locks up when processing the project (rare, but does happen...unsure why yet).

Press F1 in Pas6502 to open up the help file (or open it separately ). You can then navigate via the URLs to download the prerequisites.

There are multiple download files, one is the compiler itself (includes other files too though), and a separate help file (included in the compiler download too).

With it, you can create programs/games by compiling a subset of the Pascal language ready to be run in an emulator or on real hardware!

I will add new machine types as I get time/figure them out.

I believe it's pretty useful, but I will continually develop it. It's free, but if you want to donate to support my work, you can 😊 Donate when downloading, or send me a coffee.

The source code is available at the link below, but I've not finished updating it yet

https://bitbucket.org/paul_nicholls/pas6502/src/master/

Hope you find it useful!!

More information
StatusIn development
CategoryTool
PlatformsWindows
Rating
Rated 5.0 out of 5 stars
(3 total ratings)
Authorsyntaxerrorsoftware
Tagsatari, bbc-micro, Commodore 64, compiler, cross-compiler, pascal, utility

Download

Download NowName your own price

Click download now to get access to the following files:

pas6502.zip 6.5 MB
README_help.rtf 11 MB

Development log

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Comments

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seuck89 days ago

Hi, as Java based, could it run on Mac and Linux?

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syntaxerrorsoftware70 days ago

I'm unsure, maybe WINE would run it ok?

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dmacoco121 days ago

Hello. Nice job. I've tried quickly an example in the devkit for Oric. It works well. Next step is to go further an make a quick review for next CEO-MAG (Club Europe Oric).

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syntaxerrorsoftware116 days ago

Sweet! Thanks for the update, appreciate it 🙂 🙏

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Ven Team, The Cosmic Pick’n’Mix298 days ago

The NES examples immediately crash with an illegal OP code.

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syntaxerrorsoftware269 days ago

How are you playing the .nes files? I'm only using legal op codes...none of the illegal dodgy ones...

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Ven Team, The Cosmic Pick’n’Mix268 days ago

Mesen

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syntaxerrorsoftware269 days ago

I just tried them again using my latest build with fceux and no issues

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slevantis351 days ago

I usually don't comment on anything, this is my first comment.
Pas6502 is really great and it has so much potential. Tested the examples for C64-development and it gives you the possibility to escape micromanaging your code with keeping the transparency and control.
Something that is very much needed.
Also the GUI is much better than TRSE, because it doesn't get into your way.
It's so good. Please keep on developing it.
Also the integration of kickass and exomizer into the package is brilliant.

I need to test it a little bit more regarding the projects and units, but i do already love it.

Sidenote:
One error came up with the C64-Example "line drawing.dpr".
Here is the output:

Code parsing stage successful...
Assembly generation successfull...
Removing redundant routines stage starting...
Removing unused routine "vic_fillScreen" from the asm file...
Removing unused routine "vic_waitForRaster" from the asm file...
Removing unused routine "vic_set_scrolly" from the asm file...
Removing unused routine "vic_set_scrollx" from the asm file...
Removing unused routine "vic_set_scroll" from the asm file...
Removing unused routine "divmod_u16" from the asm file...
Removing unused routine "divmod_s16" from the asm file...
Removing unused routine "_mod8_8u" from the asm file...
Removing unused routine "_div8_8u" from the asm file...
Removing unused routine "_addDelta8ToWord" from the asm file...
Removing unused routine "_printSignedAX" from the asm file...
Removing unused routine "_printSignedA" from the asm file...
Removing unused routine "mul_8ux16s" from the asm file...
Removing unused routine "mul8x8s" from the asm file...
Removing unused routine "readb" from the asm file...
Removing unused routine "writeb" from the asm file...

C:\pas6502\pas6502>java.exe -jar "C:\pas6502\pas6502\utilities\KickAssembler\KickAss.jar" "C:\pas6502\pas6502\examples\c64\line drawing.asm"
//------------------------------------------------------
//------------------------------------------------------
//         Kick Assembler v5.25 by Mads Nielsen         
//------------------------------------------------------
//------------------------------------------------------

Output dir: C:\pas6502\pas6502\examples\c64

parsing

L18:

// e2 := 2 * error // (m1s16=c1u8_mul_m2s16.asm)

  lda #2
  sta mul_8ux16s.a

      ^

Error: Unknown symbol 'mul_8ux16s'
at line 652, column 7 in line drawing.asm
Command C:\pas6502\pas6502\compile.bat failed with exit code: 1

*******************************

WARNINGS:

fragment "C:\pas6502\pas6502\fragments\6502\m1s16=m2s16_add_m3u16.asm" doesn't exist, you need to define it...

fragment "C:\pas6502\pas6502\fragments\6502\m1s16_leq_m2u16.asm" doesn't exist, you need to define it...

fragment "C:\pas6502\pas6502\fragments\6502\m1s16_geq_m2u16.asm" doesn't exist, you need to define it...

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syntaxerrorsoftware350 days ago

Thanks so much for the kind words, and the bug report...I'll check it out :)

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syntaxerrorsoftware350 days ago (1 edit)

I've uploaded a fragments.zip file to my project page and updated the include.zip file too. Try downloading them to see if it helps. PS the line drawing code doesn't appear to work anyway lol (dang it).

https://syntaxerrorsoftware.itch.io/pas6502/devlog/745262/new-download-file-frag...

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theloon1 year ago

In a crunch with another project.  But, I just donated.  Hope you continue to update NES support :)

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syntaxerrorsoftware1 year ago(+1)

Thanks! 🙏 I will update NES as I figure more out. I'm currently trying to add stack support for recursion, but more importantly for routines in ROM that can't have their variables in ROM...

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Iapetus1 year ago

I am trying to compile one of the example programs but I always get this error: "Please use "Options" to configure where the emulators are found!"  even after configuring all the paths to the emulators.

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syntaxerrorsoftware1 year ago

Could you send me a screenshot of your options dialog and your .ini file? Maybe I can see something.

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noyen19731 year ago

I have the same problem.  Do I need to have Kick Assembler and Exomizer installed?

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syntaxerrorsoftware1 year ago (1 edit)

Kick assembler and exomizer is already included. I'll check my code... Since I have the c128 emulator already and it's the default path, I'll check the code again.

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syntaxerrorsoftware1 year ago

Ok, I've checked my code and it looks good; it saves the text result from the dialog box to the variables, and writes the variables to the .ini file.

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noyen19731 year ago

I had to copy the "pas6502" folder containing all the files to the main C:\ drive.  Editted "pas6502.ini" to point to my emulators before it would compile.  When I look in the Options>Paths window the directory paths do not show the values I manually edited but your app still compiles and runs.

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syntaxerrorsoftware1 year ago

What drive did you initially copy pas6502 to?

It is supposed to auto read from the pas6502 folder wherever it is.

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Iapetus1 year ago

I am sorry for the late answer. I have now it working; sort of. I can compile and run the c64 example arrayTest.dpr for example but when I try to compile and run circle charmodes.dpr I get an error: J:\progretro\pas6502\examples\c64\circle charmodes.asm 296:7) Error: Unknown symbol 'mul8x8s' 

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syntaxerrorsoftware1 year ago

Thanks for the reply ☺️ I'll check it out...I may need to alter one of the fragments to match the routine it's calling...

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Iapetus1 year ago

thanks

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syntaxerrorsoftware350 days ago

I've uploaded a fragments.zip file to my project page and updated the include.zip file too. Try downloading them to see if it helps.

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Iapetus350 days ago

After updating my pas6502 with the new two folders(fragments and include)  I just downloaded I am still geting the same error:

Error: Unknown symbol 'mul8x8s'

at line 794, column 7 in circle charmodes.asm

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syntaxerrorsoftware342 days ago

It was working on my local copy (unsure what I missed with the last upload), but I will upload a new whole version of the compiler soon which should help (touch wood)

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syntaxerrorsoftware1 year ago

Did you hit cancel instead of ok on the dialog box? That would not change the setting. In the meantime, I'll also look at my code to make sure I actually do save the new c128 path stuff when ok is pressed 😅

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syntaxerrorsoftware1 year ago

Ok, I've checked my code and it looks good; it saves the text result from the dialog box to the variables, and writes the variables to the .ini file. Apart from hitting cancel instead of ok, or getting the path incorrect, I'm not sure what is going it right now

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theloon2 years ago

Mention of the NES and Atari (2600?) is quite a tease.  There are very few options for the NES in higher level languages.

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syntaxerrorsoftware2 years ago(+1)

Thanks for the comment, I AM going to add NES and Atari examples into the compiler as soon as I work them out lol

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