Search found 4443 matches

by Dbug
Tue Mar 05, 2024 6:17 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.

I loaded Encounter.tap and saved a snapshot, ended up with a 116 912 bytes long Encounter.sna
by Dbug
Mon Mar 04, 2024 9:47 pm
Forum: Games
Topic: Loading tape games from disk
Replies: 13
Views: 3174

Re: Loading tape games from disk

Multi-part and game with customer loaders are always going to be difficult without patching. In this particular case, I was considering if it would be possible to store the original Encounter game on the floppy, so people could do like what I did for The Hobbit: The possibility to launch the origina...
by Dbug
Mon Mar 04, 2024 5:24 pm
Forum: Games
Topic: Loading tape games from disk
Replies: 13
Views: 3174

Loading tape games from disk

I remember I asked this question a long long time ago, but could not find the thread with the answer, so I'm going to ask here again. Assuming a Microdisc or Jasmin drive and the access to the overlay memory, and a single load game, what I'd like to do is: - Load a ROM (1.0 or 1.1) from disk - Load ...
by Dbug
Mon Mar 04, 2024 11:41 am
Forum: Technical questions
Topic: ULA, bus conflicts and the expansion devices
Replies: 24
Views: 1925

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?
by Dbug
Mon Mar 04, 2024 10:12 am
Forum: Technical questions
Topic: ULA, bus conflicts and the expansion devices
Replies: 24
Views: 1925

Re: ULA, bus conflicts and the expansion devices

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: Question: A number of people are trying to make re...
by Dbug
Sun Mar 03, 2024 8:27 pm
Forum: Games
Topic: Upgrade Time: Encounter
Replies: 165
Views: 105512

Re: Upgrade Time: Encounter

Made a small video with a summary of the current state of what the game looks like.

by Dbug
Sun Mar 03, 2024 1:17 pm
Forum: Technical questions
Topic: ULA, bus conflicts and the expansion devices
Replies: 24
Views: 1925

Re: ULA, bus conflicts and the expansion devices

The main difference between TEXT and HIRES is that the ULA does two actual memory lookups when it need to display TEXT on screen (first read the character, then read the data for this specific character on this specific line of the screen), while in HIRES it technically only needs a single look-up t...
by Dbug
Sun Mar 03, 2024 10:48 am
Forum: Technical questions
Topic: ULA, bus conflicts and the expansion devices
Replies: 24
Views: 1925

Re: ULA, bus conflicts and the expansion devices

I'm dying to know which design choice came first for using the 4069: Was it first for Phi2 delay then second for A0-3 clamping, or the othe way around? The mixing of logic types makes it hard to follow. It would be very interesting to see a Jasmin checked with a scope before and after that Phi2 cir...
by Dbug
Thu Feb 29, 2024 7:02 pm
Forum: Hardware hacks and extensions
Topic: Atmos replacement keyboard
Replies: 9
Views: 2877

Re: Atmos replacement keyboard

At some point I was imagining an Atmos modification to have a wider case, with a built-in numpad, but for practical reasons it would have been using modern cherry switches, the difficulty was to make the keycaps with the proper colors and markings, including the weirdly shaped SHIFT and RETURN keys ...
by Dbug
Mon Feb 26, 2024 11:50 am
Forum: Technical questions
Topic: ULA, bus conflicts and the expansion devices
Replies: 24
Views: 1925

Re: ULA, bus conflicts and the expansion devices

You can find all the Cumulus related documents there:
https://github.com/Dhebug/osdk_svn_impo ... re/cumulus
by Dbug
Mon Feb 26, 2024 8:47 am
Forum: Technical questions
Topic: ULA, bus conflicts and the expansion devices
Replies: 24
Views: 1925

Re: ULA, bus conflicts and the expansion devices

I don't have the technical knowledge to answer these questions, but all I can say is that: - Quite a few Oric require a bus amplifier to work properly with external devices, the "Cumulus" device comes with its own ampli-bus directly on the connector, as an example. - I believe the Microdis...
by Dbug
Sun Feb 25, 2024 3:18 pm
Forum: Technical questions
Topic: Trying to fix an Oric 1
Replies: 17
Views: 1127

Re: Trying to fix an Oric 1

Cool, well done :)
by Dbug
Sat Feb 24, 2024 2:52 pm
Forum: Technical questions
Topic: Trying to fix an Oric 1
Replies: 17
Views: 1127

Re: Trying to fix an Oric 1

There's a section about the RESET on the Service Manual (page 35):
https://library.defence-force.org/index ... ch=service
by Dbug
Thu Feb 22, 2024 6:44 pm
Forum: Audio tools
Topic: Arkos Tracker
Replies: 0
Views: 1294

Arkos Tracker

After having done a few tests, I think we can safely say that the Arkos player is better than the MYM on pretty much all points, except the number of available songs. I made a small music demo using the 6502 Arkos player that both Xeron and ISS used for their demo and game, in the same format as the...
by Dbug
Tue Feb 20, 2024 9:09 pm
Forum: Games
Topic: cc65-Chess for Oric by [raxiss]
Replies: 21
Views: 11792

Re: cc65-Chess for Oric by [raxiss]

Is the AKS file for the intro music available anywhere?