Search found 18 matches

by DrBob
Sat Apr 20, 2019 5:01 pm
Forum: Technical questions
Topic: Oric on VGA monitors
Replies: 5
Views: 656

Re: Oric on VGA monitors

Hi Symoon, The circuit takes the RGB and composite synch from the Oric output socket and by digital means produces buffered signals into 75 Ohms of RGB Vertical & Horizontal synch for VGA. In the old days this was accomplished by taking a copy of the composite synch and low-pass filtering for Vertic...
by DrBob
Sat Apr 20, 2019 1:49 am
Forum: Technical questions
Topic: Oric on VGA monitors
Replies: 5
Views: 656

Re: Oric on VGA monitors

Hi Chema
A circle on the Oricutron is 3.4"x3.4"...1:1, the same program generates a circle 8.3"x6.5"...~4:3 on the VEGA screen which is 7:4. I must say I am unable to think of a reason. Is the synch rates from the output socket different to those used for the RF output do you know?
by DrBob
Fri Apr 19, 2019 11:08 pm
Forum: Technical questions
Topic: Oric on VGA monitors
Replies: 5
Views: 656

Oric on VGA monitors

I have noticed a lot of interest in a topic on SCART to TV. I tried this without success; I believe because the Oric RGB synch signal is inverted (WRT UK TVs) and, anyway, taking over the home TV was not on. I therefore made a simple circuit to convert the Oric output to VGA which is synch separated...
by DrBob
Tue Jan 08, 2019 3:13 pm
Forum: Tape and floppy disk converters
Topic: Old tapes-analysis and convertion to text
Replies: 9
Views: 1272

Re: Old tapes-analysis and convertion to text

I post this here in case anyone gets in a twist like I did. Having old tapes, but not the recorder on which they were made, I have played them back on two recorders with little success. One is a Bush slow recording shown in above post. The next I tried did not work with my programmes at all. I have ...
by DrBob
Sun Jan 06, 2019 8:18 pm
Forum: Hardware hacks and extensions
Topic: ORIC SDCARD
Replies: 32
Views: 6001

Re: ORIC SDCARD

I don't know whether this post helps in any way to this topic. However I found it recently. I made and sold one of these mapping units back in the eighties (to someone in Norway I think!). It allows one to use the memory already in the ORIC-1 which is behind (?) the display memory. The small program...
by DrBob
Thu Jan 03, 2019 2:07 pm
Forum: Tape and floppy disk converters
Topic: Old tapes-analysis and convertion to text
Replies: 9
Views: 1272

Re: Old tapes-analysis and convertion to text

That is most interesting Symoon, thank you. As an aside it says to me that the system is a classic example of a dash to market. It highlights the problem of sloppy tape players. I have measured the frequencies of the slow tapes from the one I have (see attachment). Also observe the HF print through ...
by DrBob
Wed Jan 02, 2019 3:45 pm
Forum: Tape and floppy disk converters
Topic: Old tapes-analysis and convertion to text
Replies: 9
Views: 1272

Re: Old tapes-analysis and convertion to text

Thanks for that Symoon.
If the VIA 6522 detects "positive transitions" I suspect that the ORIC tape input should work if just square waves are applied to it.
However, I have quite a lot to think about now. Thanks for the info, I will get back to you at some stage if I may. :D
by DrBob
Tue Jan 01, 2019 4:44 pm
Forum: Tape and floppy disk converters
Topic: Old tapes-analysis and convertion to text
Replies: 9
Views: 1272

Re: Old tapes-analysis and convertion to text

PS begin I have just realised that I should be able to reconstitute (stitch together) the sine-wave frequencies 'clean' from my computer analysis (the analysis seems to be more robust than the ORIC) and convert the frequencies to fast, or any speed! Attached is my only reasonably clean WAV file. I w...
by DrBob
Tue Jan 01, 2019 4:02 pm
Forum: Tape and floppy disk converters
Topic: Old tapes-analysis and convertion to text
Replies: 9
Views: 1272

Re: Old tapes-analysis and convertion to text

Hi Symoon, Seasons Greetings. Thank you for the prompt reply. If I understand correctly wherever the synch sequence starts on the tape( sometimes the signal is faded very low and increases) but the synch sequence ends with 111 then restarts with start bit 0, then data ( MSB first as rs232) 01101000 ...
by DrBob
Mon Dec 31, 2018 9:13 pm
Forum: Tape and floppy disk converters
Topic: Old tapes-analysis and convertion to text
Replies: 9
Views: 1272

Old tapes-analysis and convertion to text

I see your posts Symoon and perhaps you could supply some info on the oric/atmos tape system signal processing. For a couple of months I have been attempting to take old tapes(print through different/poor playback deck) and correct their frequency response to allow decoding. This has been done on a ...
by DrBob
Thu May 31, 2018 3:08 pm
Forum: Emulators
Topic: Paste from clipboard problem
Replies: 29
Views: 4870

Re: Paste from clipboard problem

Sorry folks to give you all this trouble. I don't want to waste your time unnecessarily. Your efforts are much appreciated. I got it in pasted in by a fiddle,see post above; same file I emailed. Don't blame the OCR it was done from a printed listing on a 1984 dot matrix printer. I think it did quite...
by DrBob
Thu May 31, 2018 1:03 pm
Forum: Emulators
Topic: Paste from clipboard problem
Replies: 29
Views: 4870

Re: Paste from clipboard problem

Iss said - try the latest unofficial build from here: http://iss.sandacite.com/oricutron/ (you can choose 32 or 64 bit). - try to paste the listing in smaller parts i.e. select 20-30 lines copy/paste, than next 20-30 lines and so on ... :) It didn't seem to want to let me paste it in bits. HOWEVER,...
by DrBob
Thu May 31, 2018 12:44 pm
Forum: Emulators
Topic: Paste from clipboard problem
Replies: 29
Views: 4870

Re: Paste from clipboard problem

Iss said- try the latest unofficial build from here: http://iss.sandacite.com/oricutron/ (you can choose 32 or 64 bit). Tried that. it got the furthest so far but no cigar. Screen grab below. Note that the text window overlapped the monitor and the monitor window was not refreshed when moved until ...
by DrBob
Thu May 31, 2018 12:19 pm
Forum: Emulators
Topic: Paste from clipboard problem
Replies: 29
Views: 4870

Re: Paste from clipboard problem

Thanks ThomH,
I have sent file.
by DrBob
Thu May 31, 2018 2:23 am
Forum: Emulators
Topic: Paste from clipboard problem
Replies: 29
Views: 4870

Re: Paste from clipboard problem

wow thanks guys. Quite a lot to soak up there. Peacer Did you try it more than once I sometimes get a couple of hundred lines before it stops; once I only got one. Don't know exactly how to send ~1254 lines of text to you. Is it a timing problem. my machine is an ASUS z97-p with Intel(R) Core(TM) i7...