Search found 2769 matches

by Dbug
Wed Nov 14, 2007 11:11 pm
Forum: Hardware hacks and extensions
Topic: sd cards & stuff
Replies: 64
Views: 46504

We had some discussions about handling large devices some years ago, and something that definitely is required in such case, is to have some directory handling. Having a SDCard with a lot of files at the same level is just not practical at all, and dir will take forever. Then ideally you also need t...
by Dbug
Tue Nov 13, 2007 9:52 pm
Forum: Hardware hacks and extensions
Topic: Oric -on-a-chip
Replies: 9
Views: 10699

Do you emulate correctly the VIA and the small chip in the keyboard ?
Perhaps you just have non initialized states, and the keyboard polling routine detects you have the '*' key pressed.
by Dbug
Tue Nov 13, 2007 9:50 pm
Forum: Hardware hacks and extensions
Topic: sd cards & stuff
Replies: 64
Views: 46504

About interruptions being off, and assuming there is a DOS... well, in the demos the first thing we do is to shut out the DOS entirelly, and talk to the disc controller using direct disc, track, sector notation. The layout of the disc is written by Tap2Dsk / MakeDsk , so we are not even using filena...
by Dbug
Tue Nov 13, 2007 9:39 pm
Forum: Demos
Topic: Kindergarden Party 2007
Replies: 7
Views: 11309

Two PSU actually. One for the Oric, one for the amplified loud speakers :) I can plug a head set, there is volume control, and the Oric itself has a easy to access reset button, a vsync switch, additional jack input for the audio connection with the pc, and a joystick port in the place where the ant...
by Dbug
Tue Nov 13, 2007 9:32 pm
Forum: Games
Topic: Space99 - Music and Sound Effect Forum
Replies: 99
Views: 68435

Kindergarden. I'm currently backuping all my Oric/source code stuff, and will try to setup my Linux based OSDK. I was not updating you on the news, but I've been working on a new version of PictConv, with a built in sprite cutter. I did that to easily create fonts and bitmaps I can use later as "spr...
by Dbug
Mon Nov 12, 2007 11:19 pm
Forum: Demos
Topic: Kindergarden Party 2007
Replies: 7
Views: 11309

Kindergarden Party 2007

If everything goes fine, I will probably be present with my Oric at the Kindergarden Party: http://kg.slengpung.com/2007 Today I bought a Funai LCD-A1506 (a 15" LCD TV) and tried it on the Oric, it works very well: http://www.defence-force.org/download/oric/FunaiCloseUp.JPG I will try to code someth...
by Dbug
Mon Nov 12, 2007 11:17 pm
Forum: Hardware hacks and extensions
Topic: sd cards & stuff
Replies: 64
Views: 46504

to make a freezer you need to map the cartridge over the rom (we can do that) and then trigger an NMI. then you also need to map a bit or 2 to reverse the change & continue the system. finally, you need to write your code to make as little use of the stack as possible. i could design the hardware b...
by Dbug
Mon Nov 12, 2007 11:10 pm
Forum: Technical questions
Topic: Slave drive for Microdisc
Replies: 17
Views: 17177

With the usual restriction about pc HDD drive: They suck. Most of them are hardcoded to use ID 1, so you have to use a twisted ribbon cable to set it to ID 0 (or you have to use it as a secondary drive), and then after that you have no guarantee it will manage to write double density data. Now if in...
by Dbug
Sun Nov 11, 2007 7:51 pm
Forum: Mags and books
Topic: Scanning old fanzines
Replies: 3
Views: 7609

By the way, want to signal that I can host scans for magazines on the website, and they can be linked as well on the magazine page of defence force:

http://www.defence-force.org/computing/ ... /index.htm
by Dbug
Sun Nov 11, 2007 4:10 pm
Forum: Hardware hacks and extensions
Topic: sd cards & stuff
Replies: 64
Views: 46504

Well, mapping a file of the sdcart directly into memory as if it was a cartridge is something that comes to mind ;) My point is that some people are talking about doing some new floppy disk interface, have bus amplifiers, etc... Having such a card with the additional VIA, SD card reader, and why not...
by Dbug
Sun Nov 11, 2007 3:27 pm
Forum: Hardware hacks and extensions
Topic: sd cards & stuff
Replies: 64
Views: 46504

You can read about it here: http://oric.ifrance.com/oric/programming.html#via2 "The Telestrat has a second VIA interfacing new hardware, and allowing the selection of the memory banks. This VIA is located at address 0320. Pin assignment changed from the original Stratos when crossing the chanel (fro...
by Dbug
Sun Nov 11, 2007 3:16 pm
Forum: Hardware hacks and extensions
Topic: sd cards & stuff
Replies: 64
Views: 46504

If you need a second VIA, do you think there is a way to get something that would be at the same adress as on the Telestrat ?

The more compatible things are, the better :)
by Dbug
Sun Nov 11, 2007 1:37 pm
Forum: Games
Topic: Space99 - Music and Sound Effect Forum
Replies: 99
Views: 68435

About random routines, a point to consider is that in many context the routine should not be random at all. The fact that given the same seed you get the same serie of values is a very important property, because it means you can reproduce the events when you want to debug, or you can use that to ge...
by Dbug
Thu Nov 08, 2007 11:04 pm
Forum: General Discussion
Topic: Do you want a PC Diskette controller + ampli-bus board ?
Replies: 33
Views: 31747

With the number of people with similar/overlapping hardware knowledge on this forum, if we can't get some decent low cost-efficient-useful extension for the Oric... :twisted:
by Dbug
Tue Nov 06, 2007 8:51 pm
Forum: AY sound chip
Topic: 2 eurocents question about AY-8912 possibilities
Replies: 14
Views: 17450

Good question. I think it's 8khz, but I'm not sure. Thing is, this routine does not use any timer, it is just disabling the interruptions and try to send stuff to the soundchip as fast as possible. You probably noticed the 7 "nop" instructions, it's to slow down the replay. The faster the loop, the ...