Search found 1637 matches

by iss
Mon Mar 18, 2024 9:46 pm
Forum: C programming
Topic: Launch c program with parameters
Replies: 5
Views: 214

Re: Launch c program with parameters

Hi, @ jacqu ! Passing parameters to a program turned to be a real challenge! Dbug 's idea is the only way for an universal solution and (after lot hours :!: ) I have it working ! 8) Reading CC65 docs is really helpful, take a look also in the sources of the CC65 standard library. I need some time to...
by iss
Sat Mar 16, 2024 5:33 pm
Forum: Technical questions
Topic: ULA, bus conflicts and the expansion devices
Replies: 22
Views: 1346

Re: ULA, bus conflicts and the expansion devices

Chema wrote: Sat Mar 16, 2024 5:10 pm ... combination between ULA and RAM ...
Indeed! The keyword is "combination" of factors because ULA, RAM, CPU, I/O extensions are working on the edge of all (un)documented time-related limits.
by iss
Tue Mar 05, 2024 11:01 pm
Forum: Games
Topic: Loading tape games from disk
Replies: 13
Views: 2358

Re: Loading tape games from disk

But guys, I just realized that I have already all pieces of the puzzle - the 'improved' ROM1.1 form the #OricExos, the BOOTER (multi-FDC booter (FloppyBuilder will work too)), some glue routines, etc., So, it can be done! Wait for the demo... and give your suggestions which games/apps snapshots to g...
by iss
Tue Mar 05, 2024 7:09 pm
Forum: Games
Topic: Loading tape games from disk
Replies: 13
Views: 2358

Re: Loading tape games from disk

I wonder what's the format of the snapshots. No really fixed structure, it's more like kind of 'serialize' - here is the start of the 'save' code and the 'load' follows it. It's really easy to extract parts of it like pages 0,1,2,4 and others. More challenging is to restore VIA/AY status but yeah, ...
by iss
Mon Mar 04, 2024 12:33 pm
Forum: Technical questions
Topic: ULA, bus conflicts and the expansion devices
Replies: 22
Views: 1346

Re: ULA, bus conflicts and the expansion devices

65816! Is it still running at 1mhz, or have you found a way to make it run faster than 1mhz now and then? Yes, it's 1 MHz and 256 kB RAM - this is because of the "original" ULA limitations. For faster machine it needs redesign. Here comes the problem I've mentioned above - where to stop -...
by iss
Mon Mar 04, 2024 11:39 am
Forum: Technical questions
Topic: ULA, bus conflicts and the expansion devices
Replies: 22
Views: 1346

Re: ULA, bus conflicts and the expansion devices

Question: A number of people are trying to make replicas of the Oric motherboard. Would it be technically possible to improve over all these design faults, and produce a replica motherboard that fits into the standard Atmos case, with proper buffering, proper reset circuitry, etc... which would sti...
by iss
Mon Mar 04, 2024 9:50 am
Forum: Technical questions
Topic: ULA, bus conflicts and the expansion devices
Replies: 22
Views: 1346

Re: ULA, bus conflicts and the expansion devices

Sodiumlightbaby wrote: Sun Mar 03, 2024 10:37 pm So today I learned - don't put WD1770s straight on the bus, especially if its as hostile as the Oric's :lol:
Indeed! #Oric is full with bad HW design examples and the worst one is to leave the CPU buses unbuffered and open to this cruel world :lol:
by iss
Mon Mar 04, 2024 9:36 am
Forum: Games
Topic: Upgrade Time: Encounter
Replies: 164
Views: 104900

Re: Upgrade Time: Encounter

Dbug wrote: Sun Mar 03, 2024 8:27 pm...summary of the current state...
It's masterpiece already! Congrats, Dbug! :D
by iss
Sun Mar 03, 2024 11:51 am
Forum: Technical questions
Topic: ULA, bus conflicts and the expansion devices
Replies: 22
Views: 1346

Re: ULA, bus conflicts and the expansion devices

Your strange problem with the Jasmin - wow. I'm going to have to read that a couple times I think. Did you only see or test this in high-res mode? The issue appeared in hires but I think it's not related to the video mode, because if it depends on video than the mystery will be full! Need to refres...
by iss
Sun Mar 03, 2024 10:04 am
Forum: Technical questions
Topic: ULA, bus conflicts and the expansion devices
Replies: 22
Views: 1346

Re: ULA, bus conflicts and the expansion devices

It would be very interesting to see a Jasmin checked with a scope before and after that Phi2 circuit, and bus Phi2 vs a data pin. I'll do it but need some time (week?) to arrange the setup. You can read about the strange problem with Jasmin which I found here in old post. And here is the whole stor...
by iss
Sun Mar 03, 2024 3:12 am
Forum: Technical questions
Topic: ULA, bus conflicts and the expansion devices
Replies: 22
Views: 1346

Re: ULA, bus conflicts and the expansion devices

... Congrats for all this deep diving into #Oric's bus and Phi2 sea of troubles! :D Interesting finds indeed! The problem with long cable (>50 cm) is unresolved. The best result was with a 100 cm gold ribbon cable ( literally gold :!: which costs a fortune). My personal solution for all my hardware...
by iss
Sat Feb 24, 2024 6:25 pm
Forum: Hardware hacks and extensions
Topic: DRAMARDUINO - Dram tester with Arduino
Replies: 52
Views: 73297

Re: DRAMARDUINO - Dram tester with Arduino

I'd like to send a massive thanks to Iss for his wonderful DRAM tester instructions! Hello @ robcfg and welcome here! Your kind feedback is highly appreciated. It's the only thing that motivates me to continue to work and release retro hard- and software for free! Keep posting about your #Oric jour...
by iss
Tue Feb 20, 2024 9:20 pm
Forum: Games
Topic: cc65-Chess for Oric by [raxiss]
Replies: 21
Views: 11743

Re: cc65-Chess for Oric by [raxiss]

Dbug wrote: Tue Feb 20, 2024 9:09 pm Is the AKS file for the intro music available anywhere?
Attached. Unfortunately, I can't find the real source which I converted to AKS with arkos tracker. :oops:
by iss
Sun Feb 11, 2024 10:18 pm
Forum: Audio tools
Topic: Universal tracker
Replies: 28
Views: 29647

Re: Universal tracker

... register 7 access does not properly mask the I/O bits, resulting in the keyboard not working. Ha, you found this trap too 8) . Here are my changes: in 'PlayerAKY_6502.a' (attached) around line #441: Screenshot_20240211_224451.jpg and in 'PlayerAKYTester_ORIC.a" (attached) around line #31: ...
by iss
Sun Feb 11, 2024 5:51 pm
Forum: Hardware hacks and extensions
Topic: YM2610
Replies: 2
Views: 291

Re: YM2610

I was wondering how difficult it would be to make an adapter board to replace the AY-3-8912 by a YM2610 :) YM2610 is a BIG beast! The interfacing will be difficult with adapter board in place of AY or as external board on expansion connector. IMO the best way to go is with a FPGA which will emulate...