Here you can ask questions or provide insights about how to use efficiently 6502 assembly code on the Oric.
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Post by D3v4st31i0n » Fri Jan 31, 2014 9:08 pm

Hi, I'm looking for the source of the Roma Oric (Atmos or Pravetz) if possible buildable. Thank you.

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Re: rom

Post by peacer » Fri Jan 31, 2014 11:30 pm
Here is a chapter of marvellous book written by Geoff Philips. You can get many information about Oric rom adresses. ... sembly.pdf
This document contains full disassembly in Oric rom.

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Re: rom

Post by Dbug » Sat Feb 01, 2014 10:17 am

There you go: ... sic11b.tas

I got inspired yesterday, asked on the #c-64 IRC channel and somebody recommended this tool:

"Regenerator 1.3" is not 100% XA compatible, but the syntax is close enough that just a bit of search and replace fixes the code.
So all I did is to use the symbol files that Oricutron uses, added that to the config, and tadaa :)
The only issue was to get the data blocks correct, and also making sure that the "bit $00xx" get assembled as absolute addresses instead of zero page (that's what the '!' character is used for) else the result gets out of sync because of the missing $00.

Are you trying to make a new version of the ROM with some bug fixes like

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Re: rom

Post by ibisum » Sat Feb 01, 2014 1:55 pm

Did you do what I think you did, Dbug, and make a re-assembly of an Oric ROM from that book? Wicked! ;)

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Re: rom

Post by Godzil » Fri Feb 07, 2014 1:36 pm

There is also da65 that is quite useful:

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