The SNAKE-BYTE is a port from Apple][ to Oric.
No need to use Pravetz-8D rom. Control keys are IJKM - a typical Apple][ combination
Search found 1642 matches
- Mon Apr 08, 2024 7:34 pm
- Forum: Games
- Topic: Missing games from Oric.Org
- Replies: 280
- Views: 69071
- Wed Mar 27, 2024 1:00 pm
- Forum: Games
- Topic: Missing games from Oric.Org
- Replies: 280
- Views: 69071
Re: Missing games from Oric.Org
RTFM!
GRAB sets the memory limit to #B400, so you can't do HIMEM#B400 but 1 byte less is OK (i.e. #B3FF).
Honestly, here the HIMEM command just after GRAB is bit 'overengineered' .
- Wed Mar 27, 2024 10:11 am
- Forum: Games
- Topic: Missing games from Oric.Org
- Replies: 280
- Views: 69071
- Sun Mar 24, 2024 10:43 pm
- Forum: Hardware hacks and extensions
- Topic: CUmini - my Oric storage emulation project
- Replies: 68
- Views: 2984
Re: CUmini - my Oric storage emulation project
Here you will find the 8D I/O usage.
- Sun Mar 24, 2024 3:37 pm
- Forum: Hardware hacks and extensions
- Topic: CUmini - my Oric storage emulation project
- Replies: 68
- Views: 2984
Re: CUmini - my Oric storage emulation project
Cool project! About the coexistence with other devices: 1. it's important - allocating/reserving more $3xx addresses than needed just because to simplify i/o decoding will actually limit the usability of your device. 2. it's very important to use open-collector/drain outputs on the extension linked ...
- Mon Mar 18, 2024 9:46 pm
- Forum: C programming
- Topic: Launch c program with parameters
- Replies: 6
- Views: 1423
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...
- Sat Mar 16, 2024 5:33 pm
- Forum: Technical questions
- Topic: ULA, bus conflicts and the expansion devices
- Replies: 30
- Views: 3026
- Tue Mar 05, 2024 11:01 pm
- Forum: Games
- Topic: Loading tape games from disk
- Replies: 13
- Views: 3320
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...
- Tue Mar 05, 2024 7:09 pm
- Forum: Games
- Topic: Loading tape games from disk
- Replies: 13
- Views: 3320
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, ...
- Mon Mar 04, 2024 12:33 pm
- Forum: Technical questions
- Topic: ULA, bus conflicts and the expansion devices
- Replies: 30
- Views: 3026
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 -...
- Mon Mar 04, 2024 11:39 am
- Forum: Technical questions
- Topic: ULA, bus conflicts and the expansion devices
- Replies: 30
- Views: 3026
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...
- Mon Mar 04, 2024 9:50 am
- Forum: Technical questions
- Topic: ULA, bus conflicts and the expansion devices
- Replies: 30
- Views: 3026
Re: ULA, bus conflicts and the expansion devices
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 worldSodiumlightbaby 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
- Mon Mar 04, 2024 9:36 am
- Forum: Games
- Topic: Upgrade Time: Encounter
- Replies: 170
- Views: 108306
- Sun Mar 03, 2024 11:51 am
- Forum: Technical questions
- Topic: ULA, bus conflicts and the expansion devices
- Replies: 30
- Views: 3026
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...
- Sun Mar 03, 2024 10:04 am
- Forum: Technical questions
- Topic: ULA, bus conflicts and the expansion devices
- Replies: 30
- Views: 3026
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...