Search found 1641 matches

by iss
Wed Mar 27, 2024 1:00 pm
Forum: Games
Topic: Missing games from Oric.Org
Replies: 258
Views: 66992

Re: Missing games from Oric.Org

Bodhi wrote: Wed Mar 27, 2024 12:06 pm Thank you.
By the way: What is the difference between HIMEM*B400 and HIMEM*B3FF?
RTFM! :lol:
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' :).
by iss
Wed Mar 27, 2024 10:11 am
Forum: Games
Topic: Missing games from Oric.Org
Replies: 258
Views: 66992

Re: Missing games from Oric.Org

Bodhi wrote: Wed Mar 27, 2024 8:39 am I am attaching the programme here once again,
Here is the easy fix - change line 10:
Screenshot_20240327_110300.jpg
Attached is the fixed version but the game has at least one more bug...
or it's a feature - you can shoot the ZERO too :D
Screenshot_20240327_110851.jpg
by iss
Sun Mar 24, 2024 10:43 pm
Forum: Hardware hacks and extensions
Topic: CUmini - my Oric storage emulation project
Replies: 21
Views: 600

Re: CUmini - my Oric storage emulation project

Sodiumlightbaby wrote: Sun Mar 24, 2024 9:00 pm... and Pravetz 8D?
Here you will find the 8D I/O usage.
by iss
Sun Mar 24, 2024 3:37 pm
Forum: Hardware hacks and extensions
Topic: CUmini - my Oric storage emulation project
Replies: 21
Views: 600

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 ...
by iss
Mon Mar 18, 2024 9:46 pm
Forum: C programming
Topic: Launch c program with parameters
Replies: 5
Views: 584

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: 24
Views: 1930

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: 3174

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: 3174

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: 24
Views: 1930

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: 24
Views: 1930

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: 24
Views: 1930

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: 165
Views: 105561

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: 24
Views: 1930

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: 24
Views: 1930

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: 24
Views: 1930

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...