forum.defence-force.org

Assuming the detection of ESCape works

Fancy looking stuff for sure, but does not come cheap!
- $49 for the color screen
- $29 for the card reader
plus I guess the Arduino Mega must not come cheap. That's DeLuxe hardware

Kind of a shame that this 0.96" device has more power than the whole Oric.

Chema wrote:So 6 unused cycles in all the routine for keyboard reading, which is not bad, imho.

I would call that "pretty good" instead of "not bad"

Here we are:
- Updated page: http://www.defence-force.org/computing/ ... /index.htm
- Direct link: http://www.defence-force.org/computing/ ... b-1983.pdf

That's why I was suggesting in a previous post some month ago, that we could use this time to maintain a real in memory matrix, with the status of the keys, currently pressed or not, and transitions from a state to another one.

Ok. I did a minimalistic test program that read the keys used in Space:1999, but I substituted the 4 nops with the ldy #4: loop dey: bne loop. That makes for quite a large granularity. NOP is 2 cycles long, DEY+BNE is 2+3 cycles. Something that could work better, is to do that: jmp nops nops nop no...

Just send my mail

At least this could make a minimalistic TAP file that everybody can easily try on any real oric.

I perfectly understand the tech behind, but I have to admit that I still don't understand the game

Zip'n Zap, yes, Pulsoids, yes, Magnetix, no

Considering how flaky the Oric hardware is, I would not surprised if there was large differences in timing between machines.

Using the stack, smart

The TEXT character sets are from $B400 and $B800 respectively, but the 3 lines of text at the end of the HIRES section uses the adresses $9800 and $9C00. So technically, if you start in TEXT mode, then at the end of line 25 you insert a SWITCH TO HIRES attribute, you effectively forced the 3 last li...

About the "plug the pc output to the tape input of the oric", yes this works well, but BE CAREFUL: BOTH THE ORIC AND THE PC SHOULD BE SHARING THE SAME POWER SOCKET. If you don't do that, you may be unlucky and have the two machines on two separates electric system, resulting in possible sp...

Thanks for the information Symoon :) Well, I guess it should not be too difficult to rewrite an operating system, if all it has to support is basic commands to manage files, folders and sectors. Higher level things like a command interpreter, and similar things can be built on top later. This has to...

Ok, so if you are using the osdk, you could as well use PictConv to create the data

Check the sample\c\hires_picture folder in the OSDK directory.

osdk_makedata.bat calls pictconv to generate a "picture.s" file from "picture.png".