Search found 754 matches

by iss
Tue Jan 22, 2019 10:45 pm
Forum: Technical questions
Topic: Oric-1 RGB to SCART - pin 8?
Replies: 29
Views: 941

Re: Oric-1 RGB to SCART - pin 8?

It looks good! I bet it will work :).
by iss
Tue Jan 22, 2019 9:47 pm
Forum: Technical questions
Topic: Oric-1 RGB to SCART - pin 8?
Replies: 29
Views: 941

Re: Oric-1 RGB to SCART - pin 8?

In my opinion everything will depend on the SCART-to-HDMI converter and its possibilities to handle properly the input signal/voltage on pin 8. I don't have such converter but I remember that once I've tried one and it worked fine with normal simple (just wires) RGB-SCART cable with pin 8 connected ...
by iss
Sat Jan 19, 2019 5:39 pm
Forum: Tape and floppy disk converters
Topic: TapOric - android TAP player for Oric
Replies: 62
Views: 14346

Re: TapOric - android TAP player for Oric

Well, this is actually good idea! "CSAVING" from Oric to smartphone still not work and requires more work. Maybe I'll need months to finish it, but I can strip the application and release a limited "CLOAD"-only version. Also I need to create a simple download page with some instructions... So, no pr...
by iss
Thu Jan 17, 2019 6:28 pm
Forum: Operating systems
Topic: Sedoric or not, overlay or not
Replies: 4
Views: 440

Re: Sedoric or not, overlay or not

My first idea was to check the IRQ vector, but this check will be not reliable and may easily fail. The best option to detect the RAM overlay is to check if some address is writable - something like this: lda $c000 eor #$ff sta $c000 cmp $c000 bne rom_activ ; ram active -> restore the value eor #$ff...
by iss
Wed Jan 16, 2019 8:35 am
Forum: Hardware hacks and extensions
Topic: DRAMARDUINO - Dram tester with Arduino
Replies: 2
Views: 7702

Re: DRAMARDUINO - Dram tester with Arduino

Hello, Voyageur!
I'm very glad that you liked this little tool and I'll be really happy if you share it on CEO forum.
by iss
Tue Jan 15, 2019 11:56 am
Forum: Cross development tools
Topic: Questions to CC65 users
Replies: 7
Views: 466

Re: Questions to CC65 users

And for this one: - Have you had a chance to use CC65 with the library of the OSDK? If so, which adaptations were required? Yes, but only 'void func(void)' works as is :). There are differences in: - how the result is returned: OSDK uses A(msb):X(lsb), CC65 uses X(msb):A(lsb). And because I'm always...
by iss
Tue Jan 15, 2019 11:37 am
Forum: Cross development tools
Topic: Questions to CC65 users
Replies: 7
Views: 466

Re: Questions to CC65 users

Here are kind of answers from me :) : First thing first - what are the sizes of the base types in CC65 and OSDK: printf("char : %d\n", sizeof(char )); printf("short : %d\n", sizeof(short )); printf("int : %d\n", sizeof(int )); printf("long : %d\n", sizeof(long )); printf("float : %d\n", sizeof(float...
by iss
Tue Jan 15, 2019 10:52 am
Forum: C programming
Topic: A new well-known compiler
Replies: 30
Views: 18039

Re: A new well-known compiler

@ISS, did your attempts to work with CC65 lead you to a result that can be integrated to the OSDK? Sorry, I missed your message. What I did is: I've created Makefiles with the same build rules for CC65 and for OSDK's compiler, so I can easy include them in a local Makefile (call it 'Project makefil...
by iss
Fri Jan 11, 2019 6:14 pm
Forum: Technical questions
Topic: Using GBS-8200 with Oric - things to look out for?
Replies: 3
Views: 290

Re: Using GBS-8200 with Oric - things to look out for?

Do you have more info (best schematics) about the RGBS input levels in GBS-8200? From what I read here and here : it's safe and it should work fine with direct connection (just wires) to Oric's RGB output. Maybe for best colors you need to play with the 3 potentiometers and/or solder 100 Ohm resisto...
by iss
Wed Jan 09, 2019 9:08 am
Forum: Tape and floppy disk converters
Topic: Track reading (Sedoric / FDC)
Replies: 51
Views: 30794

Re: Track reading (Sedoric / FDC)

This makes sense - first to use whole track reading just to get the "description" of the track (i.e. number of sectors and their size) and then to read every sector individually. Very interesting! :)
by iss
Mon Jan 07, 2019 2:33 pm
Forum: General Discussion
Topic: PC to Oric 3.5" floppy
Replies: 27
Views: 7842

Re: PC to Oric 3.5" floppy

Yes, the way it works is just like the recorded WAV for tape, but higher frequency is used and the values are only 0 and 1.
After recording some algorithms are used to detect logical fields in the track structure. Of course 100% success can't be guaranteed.
by iss
Mon Jan 07, 2019 11:38 am
Forum: General Discussion
Topic: PC to Oric 3.5" floppy
Replies: 27
Views: 7842

Re: PC to Oric 3.5" floppy

In my opinion the Kryoflux is very good (maybe even the best) option for recovery unreadable disks. It's absolutely worth to try especially when you have a friend who owns one. Else it's bit expensive ( 100 or 130 EUR ) for me. I have working prototype based on arduino which dumps track-by-track bit...
by iss
Mon Jan 07, 2019 12:04 am
Forum: General Discussion
Topic: PC to Oric 3.5" floppy
Replies: 27
Views: 7842

Re: PC to Oric 3.5" floppy

I tried to make some photos of cleaning but the result is ugly and nothing important can be seen. I will try next days to repeat the process but this time with helper (two hands are not enough for the task). BTW, here is a good clip for cleaning 3.5" PC floppy: https://www.youtube.com/watch?v=m6CEVt...
by iss
Sun Jan 06, 2019 11:43 pm
Forum: Hardware hacks and extensions
Topic: ORIC SDCARD
Replies: 22
Views: 2713

Re: ORIC SDCARD

Thanks, very interesting indeed. Classic scheme - clear and well designed - no doubt it will work stable. Actually it's very close to the scheme I used for OricExos slaves to enable RAM Overlay (which works nice too!) :). In the doc file is written about using MAP signal to disable internal RAM (#00...
by iss
Sat Jan 05, 2019 8:18 pm
Forum: Tape and floppy disk converters
Topic: Track reading (Sedoric / FDC)
Replies: 51
Views: 30794

Re: Track reading (Sedoric / FDC)

This is from Jasmin manual, not very informative...
jas-man.png