Page 123 of 166
Re: Raven. A homemade Atari-like computer
Posted: 24 Oct 2025 10:53
by Atarian Computing
Cyprian wrote: 24 Oct 2025 09:38
If I remember correctly, two Ravens were built in Poland
Gotcha, thanks. Attempted an edit on the table
Re: Raven. A homemade Atari-like computer
Posted: 24 Oct 2025 12:13
by agranlund
Atarian Computing wrote: 23 Oct 2025 09:54
This is what I've been able to deduce from the various threads. Am I missing someone? Can each builder verify the info?
I had it down to this, but could be wrong.
(I think TKSM's board was one of nowy80Retro)
Code: Select all
1 agranlund Raven.A0
2 agranlund Raven.A1
3 drziplock Raven.A1
4 oldskool Raven.A1
5 luciodra Raven.A1
6 kodak80 Raven.A1
7 kodak80 Raven.A1
8 philc Raven.A1
9 nowy80Retro Raven.A1
10 nowy80Retro Raven.A1
11 sety Raven.A1
12 dml Raven.A1
13 AtarianComputing Raven.A1
Re: Raven. A homemade Atari-like computer
Posted: 24 Oct 2025 14:07
by Atarian Computing
agranlund wrote: 24 Oct 2025 12:13
Atarian Computing wrote: 23 Oct 2025 09:54
This is what I've been able to deduce from the various threads. Am I missing someone? Can each builder verify the info?
I had it down to this, but could be wrong.
(I think TKSM's board was one of nowy80Retro)
Code: Select all
1 agranlund Raven.A0
2 agranlund Raven.A1
3 drziplock Raven.A1
4 oldskool Raven.A1
5 luciodra Raven.A1
6 kodak80 Raven.A1
7 kodak80 Raven.A1
8 philc Raven.A1
9 nowy80Retro Raven.A1
10 nowy80Retro Raven.A1
11 sety Raven.A1
12 dml Raven.A1
13 AtarianComputing Raven.A1
Ah, thanks. I just found your post regarding you keeping track in a spreadsheet. I shall leave it with you then :)
Edit: Ooh, I got lucky 13 :D
Re: Raven. A homemade Atari-like computer
Posted: 25 Oct 2025 19:10
by Mikerochip
@agranlund Another github issue raised!
And Joska, on the Atari-Forum was asking if the ram max size was 48MB, or, if we could build 32MB SIMMS?
Re: Raven. A homemade Atari-like computer
Posted: 28 Oct 2025 16:41
by LarryL
Hi,
Since 5 new Raven are in the making now, I like to „apply“ for serial numbers :D - seems, someone of you is keeping track?
@LarryL Raven.A1
@redpixel Raven.A1
Neurotoxic Raven.A1
WizardofOz Raven.A1
Bbisi Raven.A1
The last three have not yet applied for being member of this forum (but I am trying to convince them)
Regards
Michael
Re: Raven. A homemade Atari-like computer
Posted: 28 Oct 2025 21:26
by agranlund
Mikerochip wrote: 25 Oct 2025 19:10
@agranlund Another github issue raised!
And Joska, on the Atari-Forum was asking if the ram max size was 48MB, or, if we could build 32MB SIMMS?
I answered there but for visibility I'll write here as well.
It's not possible on the current board as the slots only has enough address signals routed to them to cover 16MB.
But as it turns out it was extremely convenient to route one more to the slots so I did that for rev.A2.
Likewise, it looked like it should be very straight-forward to add support for 32MB per slot in the firmware and bios.
One could, at least in theory, run bodge wire for the extra address signal to the simm slots on a rev.A1 board too.
Re: Raven. A homemade Atari-like computer
Posted: 29 Oct 2025 10:02
by Mikerochip
@agranlund
Probably a good idea, then, to add it to the list of "A1 to A2" fixes document we talked about?
Re: Raven. A homemade Atari-like computer
Posted: 29 Oct 2025 22:14
by agranlund
Mikerochip wrote: 29 Oct 2025 10:02
@agranlund
Probably a good idea, then, to add it to the list of "A1 to A2" fixes document we talked about?
I agree!
I'll do the required firmware and bios modifications. As for an actual 32mb simm, no idea, I'm not super interested in more ram myself but perhaps someone else creates one at some point?
Re: Raven. A homemade Atari-like computer
Posted: 29 Oct 2025 22:43
by agranlund
WIP Nessi firmware for the adventurous to test.
NESSI_WIP_251029.jed.zip
Thanks to
@PhilC I got back to looking at bus timing in the Nessi firmware.
Something I've felt has been needed for a while but I haven't done because it stopped being fun last time I went there.
This time I am enjoying it again.
This version has been tested to work on my computer with 50,48,40,32,25 and 4(!) mhz oscillator. And with both 2x and 1x cpu speed.
Something that wasn't possible before due to slightly dodgy and timing sensitive cpu<->mainbus and cpu<->68150 communication.
This version will become the next release assuming it works fine on not just my computer.
And a word of caution, even though I am notoriously bad at doing so myself, I'll have to do the usual recommendation of backing up your disk in case there are bugs that cause IDE access errrors or something like that. In fact, it's probably always good to have backups.. or so they say :)
Re: Raven. A homemade Atari-like computer
Posted: 31 Oct 2025 21:28
by bbisi
Hi
@bbisi Raven.A1
I am making a new Raven now. I still wait on the mainboard.
Greetings
Bernd