Search found 2509 matches

by Chema
Thu Dec 05, 2019 2:49 pm
Forum: Technical questions
Topic: Atmos/Microdisk - ghost in the machine!?!?!?
Replies: 16
Views: 225

Re: Atmos/Microdisk - ghost in the machine!?!?!?

Yeah, this seems to get more and more difficult as time goes by :( I've personally gave up with that, but the combo of HxC (or Gotek I guess) + Microdisc works well. You basically convert the DSK to HFE and store them, on the HxC, and you copy them on the Oric from the HxC to the physical floppy. We...
by Chema
Thu Dec 05, 2019 9:02 am
Forum: Technical questions
Topic: Atmos/Microdisk - ghost in the machine!?!?!?
Replies: 16
Views: 225

Re: Atmos/Microdisk - ghost in the machine!?!?!?

Glad you fixed that Microdisc!

By the way, do you have any means of writing 3" disks from disk images (dsk)? I know there is a way of connecting a 3" unit to a PC, but it seems nobody has such a setup nowadays.
by Chema
Tue Dec 03, 2019 12:16 am
Forum: Technical questions
Topic: Atmos/Microdisk - ghost in the machine!?!?!?
Replies: 16
Views: 225

Re: Atmos/Microdisk - ghost in the machine!?!?!?

Wait for someone with more knowledge than me, but I think the 12v line is just for the FD motor, not the board itself. Why it is connected to the controller chip, I don't know. About the RV1 variable resistor... you have to turn it very very slightly and reboot to check if it helps. It controls the ...
by Chema
Fri Nov 29, 2019 7:41 pm
Forum: Games
Topic: The QUILL
Replies: 2
Views: 113

Re: The QUILL

This is great!!!

I will test it immediately. Thanks indeed.

I know a group who is making a game using The Quill and they asked me for help with the Oric version. I am not sure that they want a disk game, but the possibility is indeed really interesting!

Thanks again!
by Chema
Fri Nov 22, 2019 10:10 am
Forum: Technical questions
Topic: New Member and New Oric Atmos Owner
Replies: 63
Views: 1229

Re: New Member and New Oric Atmos Owner

To be clear: NO it doesn't, not in the context I'm talking about. The system address bus, A0-15, is ONLY driven by the CPU. The ULA does NOT put anything onto this address bus. The ULA does multiplex the two halves of the system address bus (A0-15) into the 8 row and column addresses for the DRAM c...
by Chema
Wed Nov 20, 2019 11:55 pm
Forum: Demos
Topic: Alphaville's Big in Japan (Vortex->AY->YM) , mymplayer.s moded (vumeter)
Replies: 9
Views: 303

Re: Alphaville's Big in Japan (Vortex->AY->YM) , mymplayer.s moded (vumeter)

Incidentally, Big in Japan is one of the minitunes in Oricium :D
by Chema
Wed Nov 20, 2019 11:09 pm
Forum: Technical questions
Topic: New Member and New Oric Atmos Owner
Replies: 63
Views: 1229

Re: New Member and New Oric Atmos Owner

Yes, you are right about a ROM stuck only reading and never writting.

About the address bus, doesn't the ULA also read the ram to get image data, thus changing the address bus lines?
by Chema
Wed Nov 20, 2019 1:09 am
Forum: Technical questions
Topic: New Member and New Oric Atmos Owner
Replies: 63
Views: 1229

Re: New Member and New Oric Atmos Owner

I meant the memory's pin 3. I think you should be seeing variations from high to low when the rom initializes things or when the ULA reads the screen memory. Also the /WRITE signal cannot be high all the time. Maybe it is worth checking those tracks for something that might be pulling them up, or cu...
by Chema
Tue Nov 19, 2019 11:15 pm
Forum: Technical questions
Topic: New Member and New Oric Atmos Owner
Replies: 63
Views: 1229

Re: New Member and New Oric Atmos Owner

Mmmm I am not sure that pin 3 signal is correct. Isn't that the WRITE signal? If it is, then it goes out directly from the ULA. Maybe the ULA is not working or there is something in that track. Also the address lines should be jumping from 0s to 1s. They seem to be held high, as that pin 3. You said...
by Chema
Tue Nov 19, 2019 1:52 pm
Forum: Technical questions
Topic: New Member and New Oric Atmos Owner
Replies: 63
Views: 1229

Re: New Member and New Oric Atmos Owner

Last repaired oric I heard about was due to a broken multiplexor (the chips over the RAM, 74LS257). It was replaced by a 74HCT157, which is compatible in this case. Maybe it is worth trying...
by Chema
Mon Nov 18, 2019 4:32 pm
Forum: General Discussion
Topic: 3" diskettes?
Replies: 13
Views: 399

Re: 3" diskettes?

Well, the medical doctor has spoken, and he knows well. :) He is completely right. Besides microwave oven radiation is not mutagenic, which means it cannot produce mutations, and cancer (only wavelengths shorter than ultra violet are, hence the sun radiation is dangerous). We've been using them for ...
by Chema
Mon Nov 18, 2019 4:24 pm
Forum: General Discussion
Topic: Software ORICAID by MICROGRAF Help Archive
Replies: 6
Views: 214

Re: Software ORICAID by MICROGRAF Help Archive

That is excellent news. Finding copies of old missing software is great. I think Symoon is your man. He is a real expert in preserving software from tapes.

Thanks indeed!
by Chema
Sun Nov 17, 2019 9:30 pm
Forum: Emulators
Topic: Oricutron 1.0 (EDIT: Now 1.2)
Replies: 166
Views: 110405

Re: Oricutron 1.0 (EDIT: Now 1.2)

Okay, I decided to take the shortcut, blantantly stealing code from the Oricutron sources, and making a quick kludge program to convert from ORT to TAP. Done! :D A quick warning... For what I saw, Oricutron's method for saving files works well when the program calls the ROM, but cannot generate TAPs...
by Chema
Fri Nov 15, 2019 10:54 pm
Forum: Emulators
Topic: Oricutron 1.0 (EDIT: Now 1.2)
Replies: 166
Views: 110405

Re: Oricutron 1.0 (EDIT: Now 1.2)

Well, in fact what I wanted is a way either to save to tap in oricutron (not ORT) or to convert an ort to tap .. I can load the game from ort, create a snapshot and save all the memory content (including screen), but then I'll need the value of processor registers and any data which could be on the ...