Search found 37 matches

by Torlus
Wed May 29, 2013 8:41 pm
Forum: General Discussion
Topic: RIP Twilighte
Replies: 39
Views: 20697

Re: RIP Twilighte

RIP Jonathan. :(
by Torlus
Sun Aug 19, 2012 8:27 pm
Forum: Hardware hacks and extensions
Topic: Simplest MMC Interface hardware
Replies: 63
Views: 42469

Re: Simplest MMC Interface hardware

it may be a problem using fram, i think ramtron may be discontinuing 5v parts! :( gonna check this and also a slightly inferior alternative. Please, if you find an alternative to the Ramtron chips, even in 3.3V or less, please let me know ;) Anyway, if you're looking for a "second eye" to look at y...
by Torlus
Wed Aug 08, 2012 9:52 am
Forum: Hardware hacks and extensions
Topic: Simplest MMC Interface hardware
Replies: 63
Views: 42469

Re: Simplest MMC Interface hardware

32k of ram - you mean as 2 banks for o.s.? i keep getting confused about why anybody wants a ram chip. and the mcu cant write an o.s. image without sitting on the whole address & data busses - that's gonna eat up all my i/o i'd rather have the expansion rom just written from the oric side. Well, if...
by Torlus
Tue Aug 07, 2012 9:49 pm
Forum: Hardware hacks and extensions
Topic: Simplest MMC Interface hardware
Replies: 63
Views: 42469

Re: Simplest MMC Interface hardware

Well, I'm not sure to understand all what you mean, and it seems to me that's you're ditching away some critical stuff about the Oric expansion bus and signals, but well, I may be wrong, or too pessimistic. However, if you haven't done it already, please have a look at Retromaster's Cumulus-related ...
by Torlus
Mon Aug 06, 2012 10:00 pm
Forum: Hardware hacks and extensions
Topic: Simplest MMC Interface hardware
Replies: 63
Views: 42469

Re: Simplest MMC Interface hardware

Using page 3 would be much easier, all you have to do is handle "IO" and "IO control" signals to disable the VIA. Using page 0 would require to properly handle the MAP signal, which is much more difficult as its timing is picky. On Microdisc for instance, you had to adjust a variable resistor to get...
by Torlus
Sat Aug 04, 2012 1:44 pm
Forum: Hardware hacks and extensions
Topic: Simplest MMC Interface hardware
Replies: 63
Views: 42469

Re: Simplest MMC Interface hardware

no buss issues should happen, the iric is 1Mhz, the micro is 20Mhz - it can slave the buss and wait for the clocks. and as it can run down to about 2.7v weak signals shouldnt be an issue - although that shouldnt happen unless to have a 6inch ribbon cable anyway! I think you're a bit optimistic ther...
by Torlus
Sun Feb 05, 2012 9:34 pm
Forum: General Discussion
Topic: Welcome to forum.defence-force.org 2.0
Replies: 29
Views: 18026

Re: Welcome to forum.defence-force.org 2.0

First test post on the new forum.
Everything looks fine so far ;)
by Torlus
Sun Mar 27, 2011 4:19 pm
Forum: Hardware hacks and extensions
Topic: Microdisc replacement project
Replies: 183
Views: 102394

Well, my Oric project would need a full rewrite ;) Maybe some day... I've played a bit with the 6502 core of the FPGA64 project ( http://www.syntiac.com/fpga64.html ), and it would be perfect for this task. I agree that a FPGA-based handhled would be great, as there are many FPGA cores available now...
by Torlus
Wed Dec 01, 2010 5:57 pm
Forum: Hardware hacks and extensions
Topic: getting (PAL) composite signal from the ORIC
Replies: 10
Views: 13998

You can take a cheaper route with a more modern AD724 for instance.
http://www.analog.com/en/digital-to-ana ... oduct.html.
Runs on 5V.
by Torlus
Mon Nov 15, 2010 10:02 pm
Forum: Hardware hacks and extensions
Topic: Microdisc replacement project
Replies: 183
Views: 102394

Hi there, I'm just back from the "RGC 2010" retrogaming event, from where I created this topic, but a few minutes after doing it, I had no luck with with 3G connection, and couldn't get online again. During this event, I've talked with my friend Jeff (author of the HxC Floppy Drive Emulator) about m...
by Torlus
Sat Nov 13, 2010 3:36 pm
Forum: Hardware hacks and extensions
Topic: Microdisc replacement project
Replies: 183
Views: 102394

Microdisc replacement project

Is anyone aware of this project ?
http://retromaster.wordpress.com/.
I had the same idea while discussing with Fabrice last month... Well this project is more advanced than what I've done myself on this topic ;)
by Torlus
Sat Oct 02, 2010 11:48 am
Forum: Hardware hacks and extensions
Topic: Idea - Tape Deck Emulator / SD-Card
Replies: 8
Views: 8211

Idea - Tape Deck Emulator / SD-Card

I had an idea this morning (well, to be honest I somewhat "stoled" it from DBug during an IRC chat session ;)) : build a Tape Deck Emulator (TDE for short) based on a microcontroller (MCU). Basically, the MCU would be connected to Oric's tape connector, and read .TAP files from a SD-Card, and would ...
by Torlus
Wed Jul 21, 2010 7:23 am
Forum: General Discussion
Topic: comp.sys.oric - Oric Telestrat + many components
Replies: 5
Views: 4853

No, he's another Fabrice ;)
He's a vintage computers collector.
by Torlus
Wed Jul 21, 2010 7:19 am
Forum: Hardware hacks and extensions
Topic: HxC SD Card floppy disk emulator - works with Oric?
Replies: 5
Views: 5823

Yes, it requires a Microdisc (or any other controller), as it only emulates the floppy drive. Support for writing is available for "standard" MFM tracks, which I think is the case for Oric. See here for more information : http://hxc2001.free.fr/floppy_drive_emulator/index.html and http://torlus.com/...
by Torlus
Fri Jul 24, 2009 1:08 pm
Forum: Hardware hacks and extensions
Topic: Oric -on-a-chip
Replies: 9
Views: 10269

Well I haven't worked on it since what is shown on these photos. However, I also have an Altera DE1 board, and it features all the required interfaces, so it won't need an additional board, like I added for the Spartan-3 board. Someday, I will "port" it over this board (as well as many others of my ...