Search found 236 matches

by mmu_man
Mon Nov 09, 2020 1:54 am
Forum: Hardware hacks and extensions
Topic: Just in case… (nothing to see here)
Replies: 4
Views: 292

Re: Just in case… (nothing to see here)

Hmm no I'm not interested in cardboard, crystal, or those very thin and hollow boxes. Looks like the Cobra Pinball box is a retro-fitted VHS one though. And it's not meant to bundle software. The intent is to put hardware (electronics) inside. So the PCB has to be designed to fit in including with t...
by mmu_man
Mon Nov 09, 2020 1:51 am
Forum: Hardware hacks and extensions
Topic: Oric extender - a basis for DIY projects and experiments
Replies: 14
Views: 2348

Re: Oric extender - a basis for DIY projects and experiments

By the way, do we have a registry of I/O ports around to know which hardware use which? Some file in the svn repo (CSV?) that could be parsed to generate some wiki table maybe?
by mmu_man
Mon Nov 09, 2020 1:14 am
Forum: Hardware hacks and extensions
Topic: Oric extender - a basis for DIY projects and experiments
Replies: 14
Views: 2348

Re: Oric extender - a basis for DIY projects and experiments

Interesting, although I'm not sure the form factor would fit with what I had in mind for extensions… which way is the expansion connector wired? ie. where would the power jack be related to the board? I guess it's not that important since it's for prototyping. Ok, rhetOrical question: Using the same...
by mmu_man
Fri Nov 06, 2020 11:46 pm
Forum: Hardware hacks and extensions
Topic: Just in case… (nothing to see here)
Replies: 4
Views: 292

Re: Just in case… (nothing to see here)

For the record (for myself actually), Dbug's Algol screen need approximately 13.8cm x 17.7cm for its feet, judging by the picture. 7.5kg is quite a lot though, polypropylene alone won't hold it.
by mmu_man
Thu Nov 05, 2020 5:32 pm
Forum: Hardware hacks and extensions
Topic: Just in case… (nothing to see here)
Replies: 4
Views: 292

Just in case… (nothing to see here)

For some yet unspecified project(s) I've been looking at possible cases, and one cheap option was to reuse DVD cases, but these are so cheaply done they have holes on the covers, on one side for clips holding the leaflet, on the other side to hold the disk, so this means at least the top side should...
by mmu_man
Wed Nov 04, 2020 8:30 pm
Forum: Hardware hacks and extensions
Topic: Downsway Joystick Interface reverse engineering
Replies: 13
Views: 630

Re: Downsway Joystick Interface reverse engineering

Been busy cleaning up and repairing my joystick as I noticed a little part that broke in the box… glued it back and it's now fine.
by mmu_man
Mon Nov 02, 2020 1:51 am
Forum: Hardware hacks and extensions
Topic: Downsway Joystick Interface reverse engineering
Replies: 13
Views: 630

Re: Downsway Joystick Interface reverse engineering

At least the pinout seems identical to the M58725P.
by mmu_man
Sun Nov 01, 2020 7:10 pm
Forum: Hardware hacks and extensions
Topic: Downsway Joystick Interface reverse engineering
Replies: 13
Views: 630

Re: Downsway Joystick Interface reverse engineering

Flatbed scanners are good for this job too (right down to small surface mount bits if you can wring 1200 dpi out of them!) Indeed, I have one right here :-) I started creating a KiCAD project, I'll put that on the svn sometime. But I'll have to create the parts as the PROM nor the SRAMs are in the ...
by mmu_man
Sun Nov 01, 2020 3:02 am
Forum: Hardware hacks and extensions
Topic: Twilighte card & sittler card (sdcard/joysticks/mouse)
Replies: 36
Views: 10561

Re: Twilighte card & sittler card (sdcard/joysticks/mouse)

I wanted to start drawing the schematics and reinstalled KiCAD, but I had the brilliant idea of trying to install kicad-packages3d which takes 5GB when I only had 2GB free in the root partition… so I took 2 hours to clean this mess up. I'll have a look tomorrow.
by mmu_man
Sat Oct 31, 2020 10:45 pm
Forum: Hardware hacks and extensions
Topic: Downsway Joystick Interface reverse engineering
Replies: 13
Views: 630

Re: Downsway Joystick Interface reverse engineering

(hmm, 3 attachments max per post?)

Took some pics… I used my daylight lamp for this.
ORIC_Downsway_Joystick_DSCN0746.jpg
ORIC_Downsway_Joystick_DSCN0747.jpg
ORIC_Downsway_Joystick_DSCN0748.jpg
by mmu_man
Sat Oct 31, 2020 5:14 pm
Forum: Hardware hacks and extensions
Topic: Downsway Joystick Interface reverse engineering
Replies: 13
Views: 630

Re: Downsway Joystick Interface reverse engineering

Well it's just because I've seen your post asking how they worked so I just opened the box :D
by mmu_man
Sat Oct 31, 2020 1:10 pm
Forum: Hardware hacks and extensions
Topic: Downsway Joystick Interface reverse engineering
Replies: 13
Views: 630

Re: Downsway Joystick Interface reverse engineering

Interesting, I suppose the PROM's job has been integrated in the PALs.

AM9114EPC : AM9114 : Static RAM, 1Kx4, 18 Pin.

Yours is simpler to get the schematics: it's a single PCB. On the other hand, reading PALs is not as easy as PROMs, although it shouldn't be that hard to rewrite their equations.
by mmu_man
Sat Oct 31, 2020 12:14 pm
Forum: Hardware hacks and extensions
Topic: Downsway Joystick Interface reverse engineering
Replies: 13
Views: 630

Downsway Joystick Interface reverse engineering

I happen to have a single joystick adapter without any branding, but from the picture it's the Downsway one . It's programmable, you had to flip a switch, do each move on the joystick while pressing the corresponding key to have it learn, then flip the switch back. It of course forgot on power down ...
by mmu_man
Sat Oct 31, 2020 11:19 am
Forum: Hardware hacks and extensions
Topic: Twilighte card & sittler card (sdcard/joysticks/mouse)
Replies: 36
Views: 10561

Re: Twilighte card & sittler card (sdcard/joysticks/mouse)

Wow, looks like I missed quite a lot here… That's quite impressive, and not unlike what I had in my own project pile… btw I couldn't find the schematics on the site, did I miss something? I'd like to build from that, and integrate the amplibus and other hw as well. And I already have some ideas for ...