Search found 733 matches

by Godzil
Wed Feb 15, 2017 10:11 pm
Forum: Technical questions
Topic: Oric 1 and Atmos - repair help needed - EDIT: Oric 1 works
Replies: 89
Views: 5510

Re: Oric 1 and Atmos - repair help needed - EDIT: Oric 1 wor

If it goes that far, yes probably :) (as most of the important components are use for keyboard/sound/DRAM/video)

Maybe the composite/RF is not working but who care?
by Godzil
Fri Feb 10, 2017 10:13 am
Forum: Technical questions
Topic: Oric 1 and Atmos - repair help needed - EDIT: Oric 1 works
Replies: 89
Views: 5510

Re: Oric 1 and Atmos - repair help needed

Good luck! I thought the 6502 was one of the more robust chips in old computers. It tends to be RAM, ROM, VIA and all sorts of other chips that break down before the CPU does (in particular in two different computers) but one never knows before you have tested and tried to replace it. The 6502 can ...
by Godzil
Fri Feb 03, 2017 11:36 pm
Forum: Games
Topic: OASIS development
Replies: 451
Views: 92465

Re: OASIS development

Chema: Thanks (indirectly?) to remind me that I have a project to finish!
by Godzil
Tue Jan 31, 2017 8:40 pm
Forum: Hardware hacks and extensions
Topic: New Os and sdcard/usb key reader
Replies: 16
Views: 1095

Re: New Os and sdcard/usb key reader

HxC use a microcrontroller, Cumulus a CPLD. Yes and they are programmed by the person who have made the device, not a something that does everything for you like this one (you don't have to handle at all the USB stack, you just need to ask "is something connected?" "i want to read that block" and s...
by Godzil
Mon Jan 30, 2017 9:26 pm
Forum: Hardware hacks and extensions
Topic: New Os and sdcard/usb key reader
Replies: 16
Views: 1095

Re: New Os and sdcard/usb key reader

How are you going to address the USB port? I fear you underestimate the difficulty for that. Don't expect to have a driver on the oric itself for that, it will not be possible. I see a chinese chip CH376. Thats a bit of cheating but ok Hello, The chip manage USB mouse, Joystick, keyboard etc, but i...
by Godzil
Mon Jan 30, 2017 9:21 am
Forum: Hardware hacks and extensions
Topic: New Os and sdcard/usb key reader
Replies: 16
Views: 1095

Re: New Os and sdcard/usb key reader

How are you going to address the USB port? I fear you underestimate the difficulty for that. Don't expect to have a driver on the oric itself for that, it will not be possible.

I see a chinese chip CH376. Thats a bit of cheating but ok
by Godzil
Sat Jan 28, 2017 4:41 pm
Forum: Emulators
Topic: Yet Another
Replies: 37
Views: 4767

Re: Yet Another

I wrote my first emulator on a laptop with something like a Pentium 133 as the main CPU so please don't complain with your highly powered computer... ;-) Good work with the latest release :) I suspect I may have had a Pentium 200 in mine but my point was more: I can't just throw on a Linux virtual ...
by Godzil
Sat Jan 28, 2017 3:00 pm
Forum: Emulators
Topic: Yet Another
Replies: 37
Views: 4767

Re: Yet Another

I wrote my first emulator on a laptop with something like a Pentium 133 as the main CPU so please don't complain with your highly powered computer... ;-)

Good work with the latest release :)
by Godzil
Sun Jan 08, 2017 3:10 pm
Forum: Technical questions
Topic: Oric 1 and Atmos - repair help needed - EDIT: Oric 1 works
Replies: 89
Views: 5510

Re: Oric 1 and Atmos - repair help needed

4 Volt on NMI is a bit low (it should be ~5V), but high enough to be seen as a logic high weird, especially considering how NMI is connected in the Oric.

When you press the "RESET" button, does Pin6/NMI goes to 0? and if you move, without push, the reset button, does the voltage change?
by Godzil
Sun Jan 08, 2017 12:59 am
Forum: AY sound chip
Topic: "music" in Xenon meteors noise
Replies: 22
Views: 9857

Re: "music" in Xenon meteors noise

Obviously an emulator will miss the analog part (filter & so on) that are not impossible to emulate but really time consuming to get something accurate.. Mine has a filter; it creates a wave at the chip's clock rate then performs a windowing filter to reduce it to your computer's sampling rate. But...
by Godzil
Sat Jan 07, 2017 10:53 pm
Forum: Technical questions
Topic: Oric 1 and Atmos - repair help needed - EDIT: Oric 1 works
Replies: 89
Views: 5510

Re: Oric 1 and Atmos - repair help needed

The Atmos has the usual pattern. The Oric 1 has one I don't remember having seen, but it was certainly the one for the first Oric-1s. You can mimic this behavior by changing the ram pattern entry in the configuration file in Oricutron. It was related to the memory being used or the circuitry or som...
by Godzil
Sat Jan 07, 2017 7:00 pm
Forum: Technical questions
Topic: Oric 1 and Atmos - repair help needed - EDIT: Oric 1 works
Replies: 89
Views: 5510

Re: Oric 1 and Atmos - repair help needed

Why do you say that Godzil? Honest question from me trying to learn something :) If the 6502 gets stuck due to malfunction you'll continue seeing those strips on screen as the ULA is using the memory contents before the ROM actually fills the memory with some value (writes/reads $AA and $55 to ever...
by Godzil
Sat Jan 07, 2017 5:55 pm
Forum: AY sound chip
Topic: "music" in Xenon meteors noise
Replies: 22
Views: 9857

Re: "music" in Xenon meteors noise

Obviously an emulator will miss the analog part (filter & so on) that are not impossible to emulate but really time consuming to get something accurate..
by Godzil
Sat Jan 07, 2017 4:52 pm
Forum: Technical questions
Topic: Oric 1 and Atmos - repair help needed - EDIT: Oric 1 works
Replies: 89
Views: 5510

Re: Oric 1 and Atmos - repair help needed

For me, the 6502 is perfectly working as we have a test ram pattern on screen.

Does the 6522 gets hot?
by Godzil
Sat Jan 07, 2017 12:33 pm
Forum: Tape and floppy disk converters
Topic: Barbitoric has incorrect CRCs?
Replies: 15
Views: 1887

Re: Barbitoric has incorrect CRCs?

I tested both images with Microdisk controller and HxC drive - both work fine. I'll try to make real floppy disk with Writedisk soon, but looking at sources of Writedisk and Writedisk2 - they use BIOS int 13h to write sector-by-sector and this BIOS interrupt requires as input only data buffer with ...