Raven. A homemade Atari-like computer

[PhilC]

@agranlund was that using the W32i program you sent me? The blitter scores are so much quicker

[agranlund]

@agranlund was that using the W32i program you sent me? The blitter scores are so much quicker

Yep the same program (and a card that is wired up to support interleaved mode. mine has 16 pieces of 45ns ram chips)
I'll integrate the interleave-enable code in the bios and add an option for it in the menu.

[PhilC]

@agranlund was that using the W32i program you sent me? The blitter scores are so much quicker

Yep the same program (and a card that is wired up to support interleaved mode. mine has 16 pieces of 45ns ram chips)
I'll integrate the interleave-enable code in the bios and add an option for it in the menu.

Ok, that definitely doesn't work for mine but I do have another W32i card on its way, already with 2mb ram, so hopefully this one will do.

[PhilC]

BTW, this looks an interesting project

http://www.alexandrugroza.ro/microelect ... index.html

If my other W32 card works, I might try building one of these using the current one as a donor board.

[agranlund]

Updated the release package:
https://github.com/agranlund/raven/rele ... .A1.latest

20250620
rom: ckbd support
rom: eiffel key-repeat fix
rom: autorun srec programs after upload
firmware: (ckbd) added ckbd firmware binary
firmware: (nessi) reversed order of ram slots
rvbios: ET4000/W32i memory interleave setting
rvnova: ET4000/W32i memory interleave support

@dml , this nessi firmware should be a good match for your huge cpu heatsink

[dml]

@dml , this nessi firmware should be a good match for your huge cpu heatsink

That's awesome - thank you!

Hopefully I'll get the final bits very soon to start testing the machine properly.

[frank.lukas]

BTW, this looks an interesting project

http://www.alexandrugroza.ro/microelect ... index.html

If my other W32 card works, I might try building one of these using the current one as a donor board.

I have an ET4000W32i with 8x 256kx4 chips. Is it possible to solder 8x 1MBx4 chips in and add A9, creating so a 4MB W32i ISA card? The W32i GPU chip has a MAD9 pin.

[PhilC]

@frank.lukas the cards that I've seen that do 4mb all have 8 chips but I guess it's possible by adding the appropriate address line. You'd need to read the datasheet

[agranlund]

Updated rvbios to claim _MCH cookie value 0x00070000 for Raven instead of having it as -1
(V4SA is using 0x00060000 so I took the next free one as far as I'm aware)

[agranlund]

Blasphemy?

aos41_purec.png (492.98 KiB) Viewed 64 times

A friend of mine lend me his Sam460 board so I thought I'd teach it the ways of the Atari.
Sadly, crosstos-purec runs a bit too slow for comfort on that little board so it's not really viable to use for cross compiling Atari/Raven code.
(and building the m68k-atari-mint-gcc cross compiler for this host is way out of my league )