Search found 224 matches

by mikeb
Sun Jul 19, 2020 4:39 pm
Forum: Hardware hacks and extensions
Topic: ORIC SDCARD
Replies: 147
Views: 36947

Re: ORIC SDCARD

The thing is that my 27C512 didn't pass the empty test in my programmer. It did however write the binary in, and while verify fails, looking at the file contents visually show that the binary should be in there in its entirety. I don't know if you or the chip-programmer are to blame there ;) If you...
by mikeb
Sat Jul 18, 2020 3:41 pm
Forum: Hardware hacks and extensions
Topic: ORIC SDCARD
Replies: 147
Views: 36947

Re: ORIC SDCARD

I found that I could erase a UVPROM with an 18w UVC germicidal tube in less than 1 minute. If anyone needs to. Erase or nuke? Did you mount the tube inside the chip ;) ? "The recommended erasure procedure is exposure to UV light at 253.7 nm of at least 15 Ws/cm2, usually achieved in 20 to 30 minute...
by mikeb
Tue Jul 14, 2020 5:32 pm
Forum: 6502 assembly coding
Topic: Complete list of Oric Atmos adreeses
Replies: 26
Views: 2287

Re: Complete list of Oric Atmos adreeses

t it seems that the Rambling in the Rom collection isn't complete. I'll complete if i've some missing issues. The Rambling-in-Rom is as complete as it gets (#C000-#F263 ended in OUM 143-144), the remaining ones were not published (hence the notes in the .txt files). Where R-i-t-R did not actually g...
by mikeb
Thu Jul 09, 2020 5:08 pm
Forum: Technical questions
Topic: Help with two Orics
Replies: 100
Views: 10517

Re: Help with two Orics

OK those are coarse vertical bars (character block sized), and I didn't put any of *that* in the test ROM :) I suspect that if you've got a (known) working Diag Rom, and there's no sign that it got into the RAM test, it could have failed at the first hurdle (it tests a couple of low/zero page bytes ...
by mikeb
Wed Jul 08, 2020 6:24 pm
Forum: Technical questions
Topic: Help with two Orics
Replies: 100
Views: 10517

Re: Help with two Orics

It’s just stuck on showing the thin vertical bars. Vertical like | | | or the "other vertical" like -- ---- ---- I've had that problem before with reports! :) If it's coarse (character block sized) bars, like a usual Oric startup, these are usually horizontal. Vertical coarse bars I know nothing ab...
by mikeb
Wed Jul 08, 2020 6:11 pm
Forum: General Discussion
Topic: Source code repository discussion
Replies: 32
Views: 2180

Re: Source code repository discussion

None of this is hard but you have to have seen the rewards of the effort required to use it effectively. This is true. If it's your project, and you don't use any kind of revision control at all, then it's only your own time you waste when trying to work out why something stopped working, where to ...
by mikeb
Tue Jul 07, 2020 4:49 pm
Forum: 6502 assembly coding
Topic: Complete list of Oric Atmos adreeses
Replies: 26
Views: 2287

Re: Complete list of Oric Atmos adreeses

Mike, if you've scanned the two books any chance of a copy? It'd save me a job! I could concentrate on scanning the remaining articles from OUM. No problem, will PM you when they're fully uploaded somewhere (currently running). EDIT: Temporarily at http://oric.signal11.org.uk/files/pub/magazines/ f...
by mikeb
Mon Jul 06, 2020 4:49 pm
Forum: 6502 assembly coding
Topic: Complete list of Oric Atmos adreeses
Replies: 26
Views: 2287

Re: Complete list of Oric Atmos adreeses

The two books you mention -- I think you're referring to "The Naked Oric" 1 (C000-CFFF, 63 pgs) and 2 (D000-DFFF, 74 pgs) which I have on paper (in English, and have already scanned). That's only half the story then ... but the format of combining the routines from 1.0/1.1 side-by-side and the detai...
by mikeb
Sun Jul 05, 2020 5:50 pm
Forum: 6502 assembly coding
Topic: Complete list of Oric Atmos adreeses
Replies: 26
Views: 2287

Re: Complete list of Oric Atmos adreeses

(as Advanced User Guide from Leycester Whewll that i prefer, it's more detailed) The Bob Maunder one (Oric-1 Companion?) has the 1.0 ROM "disassembled" but IIRC there are no comments, and I believe it misses some of the nuance/detail e.g. routines with entry points half way through an instruction a...
by mikeb
Sat Jul 04, 2020 4:08 pm
Forum: Technical questions
Topic: Need help fixing Oric 1
Replies: 45
Views: 2863

Re: Need help fixing Oric 1

Somehow the NMI pin is always low Now if I can find a replacement NMI button, my ORIC is good as new. There is no part number shown in the service manual for this switch, but any momentary action normally-open switch would do here. It's a bonus if it fits directly into the PCB holes, but if not, th...
by mikeb
Fri Jul 03, 2020 4:44 pm
Forum: Technical questions
Topic: Need help fixing Oric 1
Replies: 45
Views: 2863

Re: Need help fixing Oric 1

So the debug ROM runs but it FAILS the CASS O/Rly/Spkr. The test does not progress anymore from there. Is it hung ? I can hear a pulsing tone with the loopback connector. Then press NMI to move on :) (It really should say "Press NMI to continue" on screen ...) From my comments in source "Timeout 20...
by mikeb
Thu Jul 02, 2020 3:51 pm
Forum: Technical questions
Topic: Need help fixing Oric 1
Replies: 45
Views: 2863

Re: Need help fixing Oric 1

I suspect I can hack the ROM for NTSC. There must be two places to change. One for TEXT and one for HIRES. Which ROM? The Oric/Atmos one for general use or the diag ROM? I didn't do a 60Hz version of the Diag ROM as I have no 60Hz-capable monitor here, and as you probably realise, the 60Hz thing in...
by mikeb
Tue Jun 30, 2020 5:17 pm
Forum: Technical questions
Topic: Need help fixing Oric 1
Replies: 45
Views: 2863

Re: Need help fixing Oric 1

I also suspect that converter may be looking at the signal from Oric and disputing that it is a valid video signal :) For a TV set/monitor of the era, close enough was good enough. All these modern smart devices are more likely to pick holes in the signal! Is there any configuring possible of the co...
by mikeb
Sun Jun 28, 2020 9:02 pm
Forum: General Discussion
Topic: Changed of hosting strategy
Replies: 12
Views: 10784

Re: Changed of hosting strategy

All seems to be working fine so far, many thanks to Dbug for rescuing the forum!
by mikeb
Sun Jun 28, 2020 8:58 pm
Forum: Operating systems, utilities and other serious software
Topic: Is BD-DOS lost to time?
Replies: 56
Views: 10214

Re: Is BD-DOS lost to time?

the real ones have a 'blister' over the ICs. (I'm not sure if that is just protective or has some other use?) I wonder if you'd be able to read a 3" disk? maybe do a disassembly? I could post something like that if you'd like to have a look. I have yet to test whether the BD disks could work on oth...