Search found 282 matches
- Tue Feb 05, 2019 6:34 pm
- Forum: Technical questions
- Topic: Oric Speech Synthesizer + Cumulus/Microdisk
- Replies: 42
- Views: 21407
Re: Oric Speech Synthesizer + Cumulus/Microdisk
The page-3 thing is because the ULA does the donkey work of decoding "this is in 0x3FF" (to the I/O line, an output). That is used by the VIA (internally) with no further decoding, to save on hardware. It means the VIA can't help but repeat up page 3. An external device that wants some of ...
- Mon Feb 04, 2019 6:19 pm
- Forum: Technical questions
- Topic: Oric Speech Synthesizer + Cumulus/Microdisk
- Replies: 42
- Views: 21407
Re: Oric Speech Synthesizer + Cumulus/Microdisk
I don't think that's right, but I always disliked the interaction on these signals, and having learned from bad/incomplete examples at an early age, I was always suspicious of how it should work :) I/O Control low: Forces the VIA off the bus, to allow external peripherals to take over the un-decoded...
- Mon Feb 04, 2019 6:00 pm
- Forum: Technical questions
- Topic: Oric-1 RGB to SCART - pin 8?
- Replies: 29
- Views: 22607
Re: Oric-1 RGB to SCART - pin 8?
I don't think your Oric is broken, more likely that the Sync output from Oric is not compatible with the board you are using (wrong level, wrong polarity, or just not configured/wired right). Is Sync connected? :) Remember Oric only provides composite sync, not H/V separate, so the board will need t...
- Sun Feb 03, 2019 10:12 pm
- Forum: Technical questions
- Topic: Oric Speech Synthesizer + Cumulus/Microdisk
- Replies: 42
- Views: 21407
Re: Oric Speech Synthesizer + Cumulus/Microdisk
Maplin's name for it was "Oric Talkback" -- also for the VIC-20 and Speccy -- The Oric one is in Maplin 1983-Dec (Issue 9). Surprise surprise, it's a Robert Penfold project :) Sadly, it wasn't the printer port after all (what was I thinking of -- maybe one of the other variants which I can...
- Sat Feb 02, 2019 7:21 pm
- Forum: Mags and books
- Topic: IOUG
- Replies: 17
- Views: 18701
Re: IOUG
Hi Steve
IOUG have been scanned (23 issues+supplement) and are with Dbug as PDFs -- they were not made public due to concerns over "data protection", addresses, phone numbers.
IOUG have been scanned (23 issues+supplement) and are with Dbug as PDFs -- they were not made public due to concerns over "data protection", addresses, phone numbers.
- Sat Feb 02, 2019 7:19 pm
- Forum: Technical questions
- Topic: Oric Speech Synthesizer + Cumulus/Microdisk
- Replies: 42
- Views: 21407
Re: Oric Speech Synthesizer + Cumulus/Microdisk
SPO256 (or SP0256) is certainly a correct chip number for speech synth, that was used in the "Maplin" Speech synth (for Oric and I think Spectrum, different PCBs). The Oric version plugged into the printer port, which avoided all this trouble
- Sun Jan 27, 2019 8:39 pm
- Forum: 6502 assembly coding
- Topic: Substraction and Addition
- Replies: 4
- Views: 7638
Re: Substraction and Addition
Maybe one day I would try to OCR the listing :) A lot of those listings were of questionable readability for human eyes, never mind computer OCR. I think OCR of listings (especially small print) is probably slower than just typing the thing in. By hand. Correcting, using best judgment and skills as...
- Tue Jan 22, 2019 5:33 pm
- Forum: Technical questions
- Topic: Oric-1 RGB to SCART - pin 8?
- Replies: 29
- Views: 22607
Re: Oric-1 RGB to SCART - pin 8?
I'm pretty sure that pin 8 open (0v) will simply leave you at the mercy of your TV set. Depending on the set, it may show a) Correct aspect (especially if set is old and 4:3!) b) Stretched/Squished aspect (16:9 set trying to stretch to fill) c) Have a setting that let's you tell it: "This is a ...
- Mon Jan 21, 2019 6:39 pm
- Forum: Games
- Topic: Trouble In Store
- Replies: 9
- Views: 6800
Re: Trouble In Store
Seeing as your existing WAV didn't work out, I went looking for the cassette for this -- because I know it has to be around here somewhere. Sadly, I cannot find it amongst other Oric and Enterprise-64 tapes, and that's got me puzzled as to where it's gone. It has to exist, I remember playing it, and...
- Sun Jan 20, 2019 6:57 pm
- Forum: Games
- Topic: Trouble In Store
- Replies: 9
- Views: 6800
- Fri Jan 04, 2019 6:30 pm
- Forum: Hardware hacks and extensions
- Topic: Cumana Disk Controller PCB
- Replies: 3
- Views: 5553
Re: Cumana Disk Controller PCB
The Cumana ROM (personally dumped from my own unit) seems to be 8K ... -r--r--r-- 1 root root 8.0K Oct 6 2010 Data/EPROM Images/OwnedStandard/cumana11.rom And this dumped from a chip loaned by Steve Marshall ... -r--r--r-- 1 root root 8.0K Oct 6 2010 Data/EPROM Images/Downloaded/Steve Marshall Loane...
- Tue Dec 04, 2018 6:42 pm
- Forum: Demos
- Topic: OricExos - making the impossible
- Replies: 156
- Views: 112834
Re: OricExos - making the impossible
It is a bit surprising that nobody in this community started such a project, or even a core for those already working on FPGAs... but that is another matter. I know for a fact that someone did do a VHDL ULA model, I came across it while looking for ULA related material. It was dated some time after...
- Mon Dec 03, 2018 6:11 pm
- Forum: Demos
- Topic: OricExos - making the impossible
- Replies: 156
- Views: 112834
- Sat Nov 10, 2018 6:32 pm
- Forum: Demos
- Topic: OricExos - making the impossible
- Replies: 156
- Views: 112834
Re: OricExos - making the impossible
Definitely getting a better balance on the weighting of the colours in the new colour bars video! Keep going :) On the video output card, that AD(unreadable) surface mount chip makes me think of this for some reason ... https://pmcvariety.files.wordpress.com/2013/11/volvo-jean-claude-van-dam.jpg?w=1...
- Thu Oct 25, 2018 5:40 pm
- Forum: Demos
- Topic: OricExos - making the impossible
- Replies: 156
- Views: 112834
Re: OricExos - making the impossible
what can be done about attribute clash in this configuration .. like, if it can be exploited somehow, actually .. Think about using even-odd operation based on the column number: While one Oric is emitting PAPER colour (because that byte is an attribute), the other one can be emitting a character/r...