Search found 1304 matches

by robcfg
Tue Sep 29, 2020 2:27 pm
Forum: Discuss This Site
Topic: Search function missing from Downloads section
Replies: 0
Views: 9

Search function missing from Downloads section

Hi everyone! I guess I'm not the only one that has noticed the missing search box on the Downloads section. Thing is, I've found that the link to the Downloads section on the left side panel points to a new address: Which has no search box. But for those lik...
by robcfg
Sun Sep 06, 2020 10:33 am
Forum: Dragon Hardware
Topic: Diagnostic Cartridge
Replies: 4
Views: 1156

Re: Diagnostic Cartridge

I think the closest thing to that would be Rolo's Dragon Multi Cartridges. Here are some links: https://archive.worl...
by robcfg
Sat Aug 29, 2020 3:24 pm
Forum: Uploads
Topic: Informatica - El microprocesador
Replies: 0
Views: 220

Informatica - El microprocesador

Hello everyone! My good friend Deepfb managed to get a rare spanish tape, which is part of a series on microcomputer architecture, and sent me the dumps and scans. I've created the page in the wiki (, and here you hav...
by robcfg
Sat Jul 18, 2020 11:16 pm
Forum: Dragon General
Topic: Dragon 32/64 in FPGA, help needed.
Replies: 6
Views: 559

Re: Dragon 32/64 in FPGA, help needed.

Hi! I'm glad to see progress on a FPGA emulation of the Dragon. As for your questions, the one of the rom locations, can be found in the excellent book Inside the Dragon . In short, the 32K Basic rom is mapped to 0x8000 to 0xBFFF and the 64K one overlaps the cartridge address space from 0xC000 to 0x...
by robcfg
Wed Jul 01, 2020 10:51 pm
Forum: Discuss This Site
Topic: Hi from Barcelona
Replies: 8
Views: 847

Re: Hi from Barcelona

Welcome to the Archive!

It's a pleasure having you here, and let me thank you again for letting me photograph and scan your Dragon MSX.

Best regards,
by robcfg
Sat Jun 27, 2020 5:20 pm
Forum: Dragon General
Topic: MAME - Dragon 200-E
Replies: 19
Views: 5882

Re: MAME - Dragon 200-E

I remember that there's an address you can write to, to enable/disable the external character rom, but if you cannot invert the characters as these have been replaced with the lowercase one, thus the switch.
by robcfg
Thu Jun 25, 2020 10:25 am
Forum: Software Requests
Topic: Bart Simpson
Replies: 6
Views: 854

Re: Bart Simpson

Maybe we could have a gallery of images in different screen modes.
by robcfg
Sun Jun 14, 2020 10:38 am
Forum: Dragon Hardware
Topic: Dragon 32 PSU board picture, "48086?" "Issue 6?"
Replies: 4
Views: 595

Re: Dragon 32 PSU board picture, "48086?" "Issue 6?"


Thank you for the pictures!

They are indeed interesting. It seems that the power part is the same and they made a new board issue to accommodate this particular RF modulator model.

by robcfg
Thu Jun 11, 2020 3:14 pm
Forum: Dragon Hardware
Topic: ?OM errors
Replies: 10
Views: 1218

Re: ?OM errors


If I remember correctly, OM stands for out of memory error, which may indicate a ram, rom or sam chip errors.

It could be that the chips are ok but there are broken track or corrosion on the motherboard.

Can you post pictures of both sides of the motherboard?

by robcfg
Fri May 29, 2020 12:28 pm
Forum: Dragon Hardware
Topic: More Oojamaflips ready
Replies: 7
Views: 1185

Re: More Oojamaflips ready

So, here's my beautiful finished Oojamaflip:
Oojama_robcfg.jpg (81.9 KiB) Viewed 965 times
It works pretty well, and I'm most proud of how well the male edge connector turned out.

Fits well inside the case too.

Thanks John!