Search found 763 matches

by Godzil
Sat Jan 07, 2017 12:11 pm
Forum: Tape and floppy disk converters
Topic: Track reading (Sedoric / FDC)
Replies: 52
Views: 39740

Re: Track reading (Sedoric / FDC)

Hum? I'm quite tired so my mind is not working well, but don't forget that what is written on the disk will not match the data you read/write. You are not doing the FM/MFM conversion in the software, it is done by the FDC, and the "missing clock bit" is for data you send to the FDC, not data written...
by Godzil
Fri Jan 06, 2017 10:04 pm
Forum: AY sound chip
Topic: "music" in Xenon meteors noise
Replies: 22
Views: 26309

Re: "music" in Xenon meteors noise

I think it should be fairly easy to test, with enough sample to found the way the random is generated, just configure the channel to random, let it play for a long time and store the waveform, then convert that waveform for each output level, and with time you will get a repetition, and from that po...
by Godzil
Fri Jan 06, 2017 9:59 pm
Forum: Technical questions
Topic: Oric 1 and Atmos - repair help needed - EDIT: Oric 1 works
Replies: 89
Views: 53553

Re: Oric 1 and Atmos - repair help needed

If it stay on the ram test pattern, it's probably the 6522 or the AY-3-8910
by Godzil
Wed Jan 04, 2017 8:42 pm
Forum: AY sound chip
Topic: When does the AY reload its counters?
Replies: 1
Views: 6993

Re: When does the AY reload its counters?

I would say that the AY will re-get the values from the registers on each external clock edge. What would probably happen is that the timer is not reset but will use the new parameters. I think it can be tested by using maybe a slower clock (even if a sub 50Mhz scope would be enough) and do the test...
by Godzil
Tue Dec 06, 2016 10:30 pm
Forum: General Discussion
Topic: Next Cumulus batch
Replies: 98
Views: 114223

Re: Next Cumulus batch

Hehe thanks, I'm working on the CPLD for the Cumulus 2, and will probably do a run of prototype in January :) It going to take about 2 weeks for making the PCB so even if I order now, I will not be able to work do anything with it before next year.. So I take my time to be sure that I'm going to mak...
by Godzil
Sat Oct 15, 2016 1:27 pm
Forum: Emulators
Topic: Clock Signal — an Oric emulator for macOS and Linux
Replies: 110
Views: 56758

Re: Yet Another

Interesting :) Regarding timers, I wrote some benchmarking code few years ago which allowed us to notice discrepancies between real Orics, Oricutron and Euphoric, so when you have something that can run code, we should be able to help with your timings. Where can we find that code? I would be inter...
by Godzil
Mon Oct 10, 2016 10:11 pm
Forum: Cross development tools
Topic: Oric Character Generator
Replies: 22
Views: 21974

Re: Oric Character Generator

Symoon wrote:Looks nice!
What language did you program it with?
I would say VB6 but I may be wrong.. :D
by Godzil
Sun Oct 02, 2016 4:36 pm
Forum: Hardware hacks and extensions
Topic: Announcing... the AtmoStrat !
Replies: 41
Views: 31607

Re: Announcing... the AtmoStrat !

Two video pages? And since it's reading the video memory that refresh the DRAM how this is handled? Because I'm sure that if we switch the pages, the ULA will no longer be able to access the main ram, so.. ?
by Godzil
Sun Sep 25, 2016 2:34 pm
Forum: Cross development tools
Topic: C++17 on Commodore 64
Replies: 3
Views: 7442

Re: C++17 on Commodore 64

Dbug wrote:Very interesting CppCon talk:
https://www.youtube.com/watch?v=zBkNBP00wJE

Maybe something we could use there :)
Erf, some people really have bad taste :o
by Godzil
Wed Sep 07, 2016 8:25 pm
Forum: General Discussion
Topic: Atmoses, Microdiscs and Telestrats on ebay
Replies: 45
Views: 38365

Re: Atmoses, Microdiscs and Telestrats on ebay

ibisum wrote:I'm really not going to sell it, because it is such a cool machine, but I have to say when the prices go high like that, things get a little difficult .. ;)
If you are sure to buy a cheaper one after, what can I say.. :D
by Godzil
Wed Sep 07, 2016 8:48 am
Forum: General Discussion
Topic: Atmoses, Microdiscs and Telestrats on ebay
Replies: 45
Views: 38365

Re: Atmoses, Microdiscs and Telestrats on ebay

ibisum wrote:/me casts a lusty eye at my Telestrat sitting there .. unused ..
No worries, it will be on eBay sonner than later, it's not collection, but speculation here, especially when it goes that high.
by Godzil
Sun Sep 04, 2016 6:10 pm
Forum: General Discussion
Topic: Atmoses, Microdiscs and Telestrats on ebay
Replies: 45
Views: 38365

Re: Atmoses, Microdiscs and Telestrats on ebay

These guy are just stupid.. anyway
by Godzil
Mon Aug 29, 2016 8:17 pm
Forum: General Discussion
Topic: Atmoses, Microdiscs and Telestrats on ebay
Replies: 45
Views: 38365

Re: Atmoses, Microdiscs and Telestrats on ebay

300€? Way too expensive.. :(
by Godzil
Mon Aug 08, 2016 7:40 pm
Forum: AY sound chip
Topic: Oric's 8912 volume scale
Replies: 35
Views: 34227

Re: Oric's 8912 volume scale

On the topic, there's some interesting details about sound on Gunstick's presentation: https://www.youtube.com/watch?v=yLDtiTS4JLg Around the 34th minute there are some Audacity sample output of the three channels, and discussion of the shape on emulators vs real machine. I have a friend that could...
by Godzil
Wed Aug 03, 2016 9:48 pm
Forum: Tape and floppy disk converters
Topic: Experimental very fast tape loading
Replies: 138
Views: 53106

Re: Experimental very fast tape loading

I would be curious to see side by side with the "normal" way of working.

For the network part I think that using the audio card is not a good idea, it would be better and more reliable to use a small microcontroller, probably connected to the PC via USB