Re: [Atari800-users] portb ram extensions

[Miro K. <mir...@gm...>]

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 <
ata...@li...> wrote:

> Hi. I'm sorry, my fork is available here:
> 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/
> >> Altirra%20Hardware%20Reference%20Manual.pdf and 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
> >> - 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
> >>
> >> 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-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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