Search found 163 matches

by mikeb
Sat Feb 22, 2020 6:35 pm
Forum: General Discussion
Topic: 65C02 computer from first principles.
Replies: 5
Views: 145

Re: 65C02 computer from first principles.

Badger wrote:
Fri Feb 21, 2020 10:34 pm
Well worth building these as they can give you a spark to create something :)
You'll definitely get some kind of spark, as he tends to modify circuits with the power on.

@Chema thanks for that -- that's even better than my memory of it :)
by mikeb
Fri Feb 21, 2020 5:50 pm
Forum: Games
Topic: Meurtre à grande vitesse, why there is not a TAP file?
Replies: 6
Views: 160

Re: Meurtre à grande vitesse, why there is not a TAP file?

ThomH wrote:
Thu Feb 20, 2020 8:17 pm
Oh, sorry! That was very poorly worded. Read it "one is claiming to support WAV...".
No need to apologize, I got your meaning, I was just making a funny. Your point was absolutely right though.

(Disclosure: I have written can't-be-bothered "WAV" loaders for myself!)
by mikeb
Fri Feb 21, 2020 5:46 pm
Forum: General Discussion
Topic: 65C02 computer from first principles.
Replies: 5
Views: 145

Re: 65C02 computer from first principles.

I did watch this video a couple months ago, it was quite cool, specially when I knew in advance why this and that happened :) There's 6 videos in the playlist (recent additions) with more to come, so you may need a refresh :) But even knowing the 6502 quite well, it is interesting seeing this throu...
by mikeb
Thu Feb 20, 2020 5:55 pm
Forum: Technical questions
Topic: Connecting to a tape recorder in 2019
Replies: 18
Views: 1535

Re: Connecting to a tape recorder in 2019

robcook wrote:
Wed Feb 19, 2020 7:58 pm
I still have no cassette/data recorder :(
Bearing in mind the subject says "Connecting to a tape recorded in 2019", and it's now well into 2020, you will also need to purchase a longer lead.
by mikeb
Thu Feb 20, 2020 5:52 pm
Forum: Games
Topic: Meurtre à grande vitesse, why there is not a TAP file?
Replies: 6
Views: 160

Re: Meurtre à grande vitesse, why there is not a TAP file?

WAV is a bit dodgy because technically it's only a container format ... as you're claiming that you support WAV and you don't really. Just a subset. I claim nothing! :) Not my tools, not my problem! But you're absolutely right -- WAV is being used here in the context of WAV2TAP/TAP2WAV etc. which l...
by mikeb
Thu Feb 20, 2020 5:45 pm
Forum: General Discussion
Topic: 65C02 computer from first principles.
Replies: 5
Views: 145

65C02 computer from first principles.

Just thought I'd share this link on here -- although it is not Oric related, this guy is putting together a 65C02 based "My First Computer" on breadboard, and I found it really interesting. He really is doing a good job of explaining as he goes along, including some things which become a teaching mo...
by mikeb
Wed Feb 19, 2020 6:08 pm
Forum: Games
Topic: Meurtre à grande vitesse, why there is not a TAP file?
Replies: 6
Views: 160

Re: Meurtre à grande vitesse, why there is not a TAP file?

"mpossible to transfer to TAP file". Why? I looked at the page you linked, it says it's available as an audio (WAV) transfer that works with Euphoric. My guess would be that the original program includes some form of copy-protection, or something which is not correctly understood by the various WAV...
by mikeb
Mon Feb 10, 2020 5:52 pm
Forum: Demos
Topic: Real Time 3D example
Replies: 26
Views: 2257

Re: Real Time 3D example

Very nice demo -- now, if only there was a way to synchronize two Orics together, both running the same code, with same source data, but rendering from slightly different points of view (left, right), you could do a true 3-D display, one for each eye ... Oh wait ... http://forum.defence-force.org/vi...
by mikeb
Mon Feb 03, 2020 6:23 pm
Forum: Operating systems
Topic: Is BD-DOS lost to time?
Replies: 26
Views: 1369

Re: Is BD-DOS lost to time?

non-cable bit of a Byte Drive 500 to find out what's meant to be selectable from the machine — e.g. is there a side toggle? Is there a double-density toggle? From the article above, it seems the COB interface board for Oric is just there to provide an Oric (Atmos) specific boot ROM/hardware logic/W...
by mikeb
Sat Feb 01, 2020 8:41 pm
Forum: Operating systems
Topic: Is BD-DOS lost to time?
Replies: 26
Views: 1369

Re: Is BD-DOS lost to time?

Here is how the "Hybrid" cable looks: Well thanks for digging that up -- and "Yuck!" :( "revolutionary advance in the world of home computing" -- more like annoying retrograde step to prevent it ever being understood! Looks like both sides have COB (chip on board) under epoxy blobs, like used on di...
by mikeb
Fri Jan 31, 2020 5:25 pm
Forum: Hardware hacks and extensions
Topic: Securing sources of (official) Oric chips
Replies: 12
Views: 2551

Re: Securing sources of (official) Oric chips

Dbug wrote:
Thu Jan 30, 2020 8:35 pm
I'm now waiting for a few more chips (rams, 6502, soundchips, capacitors and tension regulator)
Sounds like you have a rare early clockwork version of Oric there ... :)
by mikeb
Thu Jan 30, 2020 5:43 pm
Forum: Operating systems
Topic: Is BD-DOS lost to time?
Replies: 26
Views: 1369

Re: Is BD-DOS lost to time?

possibly I'm wrong about the function of _both_ $311 and $317. $0310-$03FF is definitely going to be I/O to the disk hardware. Beyond that, ? If someone has a proper schematic of this board, then what the addresses do can be derived from the schematic, otherwise it's either guesswork or relying on ...
by mikeb
Tue Jan 28, 2020 9:34 pm
Forum: Operating systems
Topic: Is BD-DOS lost to time?
Replies: 26
Views: 1369

Re: Is BD-DOS lost to time?

0400 2C 11 03 BIT $0311 ; Unknown purpose. 0403 2C 17 03 BIT $0317 ; Unknown purpose. The comment from @iss relating to the other BIT instructions is a good observation, and it's always interesting when tricks like that slide into assembler :) The above two however I would say are NOT used to "hide...
by mikeb
Sun Jan 19, 2020 6:59 pm
Forum: Technical questions
Topic: ULA versions
Replies: 10
Views: 590

Re: ULA versions

You think they made millions of ULAs? Well, not literally ... but as no-one counted them at the time, can you prove otherwise ;) I don't know what the total production run was of all Oric-1 16k, 48k, ATMOS, all the derived machines being built in Europe, plus the mountain of chips lurking around Bu...
by mikeb
Sat Jan 18, 2020 5:57 pm
Forum: Technical questions
Topic: ULA versions
Replies: 10
Views: 590

Re: ULA versions

Would they have produced a new generation of ULA for the Atmos, or just continued with the same ones? They may have sent out for more batches, to keep up with production volumes, as 83 rolled into 84, but I don't think they changed the design internally. Oric to Atmos was: Better case and keyboard,...