Re: [Atari800-users] portb ram extensions

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Hi Jerzy,

no problem. Specifically when it comes to atari800, my delays in reviewing
and/or fixing things are comparably long. :-)

We are about to prepare a new release (right, Petr? ;-)), so your
contribution would be a welcomed addition for the release after this one.

On Fri, 27 Jun 2025 at 20:41, Jerzy Kut via Atari800-users <
ata...@li...> wrote:

> Hello Miro.
> First of all, excuse me please for a long delay with a reply to your
> post. I haven't ignored it, but I got stuck in implementation of
> specific memory extension (from Nevell Industries) what maps base memory
> blocks in extended memory window and all this work stays unfinished till
> now. In the meantime, reading old Polish magazine "Bajtek" I found other
> extensions (coming from Polish companies TOMS and Karen), so my
> intention is to describe all of these and propose better names for all
> command line parameters to select specific extension. But I need to
> finish this work at first.
> Cheers
> Jerzy Kut
>
>
> W dniu 17.12.2024 o 23:33, Miro Kropáček pisze:
> > Hi Jerzy,
> >
> > I have briefly gone through your branch, looks good to me. Feel free to
> > create a PR from it.
> >
> > Just a couple of minor comments:
> >
> > - "-192" could indeed be named "-192xe"
> > - "-192" is described as 192X*T*, is that a typo or intent?
> > - it seems that you tried to clean up the rambo/compy shop naming but
> > the descriptions were kept? (e.g. "-320|-rambo" is still described as
> > "320XE" and then we have "-320xe" which is also described as
> > "320XE") ... I'm not sure what makes "XE" being "XE" (default ROM used?)
> > but perhaps we should omit those names and use something like "Atari
> > with 320 KB (Compy Shop)" or something like that? Or at least explain
> > the difference in the same file.
> >
> > On Sat, 14 Dec 2024 at 17:52, Jerzy Kut via Atari800-users <atari800-
> > us...@li... <mailto:atari800-
> > us...@li...>> wrote:
> >
> >     Hi. I'm sorry, my fork is available here:
> >     https://github.com/mono6502/atari800/tree/ramext_256_576 <https://
> >     github.com/mono6502/atari800/tree/ramext_256_576> .
> >     Regards
> >     Jerzy Kut
> >
> >     W dniu 14.12.2024 o 17:33, Jerzy Kut pisze:
> >      > 576 KB Rambo was probably offered by mytek's Atari 576 NUC+.
> >      > Regards
> >      > Jerzy Kut
> >      >
> >      >
> >      > W dniu 14.12.2024 o 17:25, Jerzy Kut pisze:
> >      >> Hello.
> >      >>
> >      >> I've added support for a few PORTB managed extram types
> >     described in
> >      >> https://www.virtualdub.org/downloads/ <https://
> >     www.virtualdub.org/downloads/>
> >      >> Altirra%20Hardware%20Reference%20Manual.pdf and http://
> >      >> atariki.krap.pl/ <http://atariki.krap.pl/> index.php/
> >      >> Obs%C5%82uga_standardowego_rozszerzenia_pami%C4%99ci_RAM
> >      >> and a new specific type of Rambo extension made nowadays by TFHH
> >     (it
> >      >> was really helpful when we're working on "Mikie" port by Vega).
> >      >>
> >      >> They are:
> >      >> - 192 KB (Karen) - a Compy Shop type extension with 128 KB (8
> >     banks)
> >      >> of additional memory compatible with 130XE; it was offered in
> >     nineties
> >      >> of XX. century by PZ Karen company, which was official
> >     distributor of
> >      >> Atari for Poland,
> >      >> - 256 KB (Rambo) - a Rambo type extension with 192KB (12 banks)
> of
> >      >> additional memory offered in nineties of XX. century by TOMS
> >     company
> >      >> in Poland: http://atariki.krap.pl/index.php/TOMS_260XE <http://
> >     atariki.krap.pl/index.php/TOMS_260XE>
> >      >> - 576 KB (Rambo) - forgive me, I forgot who offers it, but it's
> >      >> described by Pharaon and the Atariki too,
> >      >> - 576 KB (TFHH) - a Rambo type extension with 512 KB (32 banks)
> of
> >      >> additional memory offered nowadays by Jurgen van Radecke:
> https://
> >      >> www.van-radecke.de/STUFF/tfhh_HW_info.pdf <http://www.van-
> >     radecke.de/STUFF/tfhh_HW_info.pdf>
> >      >>
> >      >> These types of ram extensions can be enabled from command line
> >     using:
> >      >> -192 (maybe 192xe will be better?)
> >      >> -256
> >      >> -320 (as well as -rambo using so far)
> >      >> -576
> >      >> -576tfhh
> >      >>
> >      >> Additionally more info (mostly useful for developers) is
> presented
> >      >> during amount of ram is selected in UI:
> >      >> - separate ANTIC and CPU access (ANTIC-CPU) or common one
> >     (ANTIC+CPU)
> >      >> - all bits and their order using to bank selection ("*" marks
> >     CPU and
> >      >> ANTIC enabling bits, "_" bits not used to select bank)
> >      >> - a number of banks.
> >      >>
> >      >> You can see examples on screenshots:
> >      >> - https://mono.i-demo.pl/atari800/ramsize-karen.png <https://
> >     mono.i-demo.pl/atari800/ramsize-karen.png>
> >      >> - https://mono.i-demo.pl/atari800/ramsize-tfhh.png <https://
> >     mono.i-demo.pl/atari800/ramsize-tfhh.png>
> >      >>
> >      >> I've not implemented Newell Industries extensions because I've
> >     never
> >      >> seen them and know only from papers. I've not implemented so
> called
> >      >> "Jet extension" which was offered years ago by the scener Jet
> >     and was
> >      >> a bit exotic - only half banks was available for ANTIC, because
> >     ANTIC
> >      >> bit was involved in bank selection - this extension is known by
> me
> >      >> only from chats with Polish sceners and I've never seen working
> >      >> example of it too.
> >      >>
> >      >> I could make pull request with this work.
> >      >> Best regards
> >      >> Jerzy Kut
> >      >
> >
> >
> >
> >
> >
> >     _______________________________________________
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> >     us...@li...>
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> >
> >
> >
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> >
> >
> >
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