Search found 1557 matches

by Andy Rea
Wed May 28, 2008 11:55 pm
Forum: Hardware
Topic: Can ZX81 load progs directly from MP3 player?
Replies: 14
Views: 11059

Re: Can ZX81 load progs directly from MP3 player?

It All depends on the output level of your MP3 player i have found the Cheap ones usually give a higher level output than the more expensive ones, as for MP3's and high bit rates doesn;t really make the file that much bigger because zx81 tape data is highly compressable, even more so if you sample i...
by Andy Rea
Wed May 28, 2008 11:50 pm
Forum: Emulators
Topic: EightyOne 1.0a
Replies: 13
Views: 10724

Re: EightyOne 1.0a

This is Fantastic Work SirMorris, i reall like the symbols in the debugger, should be a real help when developing your own Z80 routines, i also like the resizable memview window, Something that i will try and implement too. Labels on the flags make it much easier to quickly check the state of any gi...
by Andy Rea
Tue May 27, 2008 11:02 pm
Forum: Emulators
Topic: Testing Emulators.
Replies: 23
Views: 16099

Re: Testing Emulators.

Well i know what Blitting is, but how to do it, i don't know, i guess there must be plenty of examples on the net thought, since as my emu is only ever going to be an ZX81 emu i could just draw the chars if stopped or single stepped, the realtime update it still a bit slow but it's useful for findin...
by Andy Rea
Sun May 25, 2008 4:26 pm
Forum: Emulators
Topic: Testing Emulators.
Replies: 23
Views: 16099

Re: Testing Emulators.

Thanks Mike, i'll see what i can knock up then, hopefully by then end of the bank holiday i'l have something workable.

Regards Andy.
by Andy Rea
Sun May 25, 2008 2:38 pm
Forum: Emulators
Topic: Testing Emulators.
Replies: 23
Views: 16099

Re: Testing Emulators.

Got a techincal question regarding tape emulation, More specifically TZX format, reading the TZX format specification it has an example of the generalized data block for ZX81, that seems to be using 3.5Mhz timing however earlier on in the rules and definitions its quite clearly states that timing sh...
by Andy Rea
Sun May 25, 2008 12:05 am
Forum: Emulators
Topic: Disassembling
Replies: 4
Views: 5591

Re: Disassembling

Hi Mike, I've been Thinking about this since you posted it, and i think your gonna need a super Ai Comp to do this, Whilst it's possible sometimes for a human to work out what's what we would be looking at the bigger picture structure of the overall code ect and trying to choose the best fit instruc...
by Andy Rea
Sat May 24, 2008 8:06 pm
Forum: Emulators
Topic: Testing Emulators.
Replies: 23
Views: 16099

Re: Testing Emulators.

Yes it's my first 'C' program (but i do tinker with idea's in a temporary project before putting it in) ,althought i have programmed in the past many dialects of Basic (bbc, sinclair, qbasic, gwbasic, commodore), 6502 assembler, Z80 assembler (i used to code my first programs by hand using lookup ta...
by Andy Rea
Sat May 24, 2008 12:34 pm
Forum: Emulators
Topic: Testing Emulators.
Replies: 23
Views: 16099

Re: Testing Emulators.

It's here Code Rewind :mrgreen: upto 255 steps of backtracking allowing you to change register contents and step through the same code again and again, Once the memory editor is complete this could be a really useful feature (i hope). basiccaly everything else is the same as before to modify a regis...
by Andy Rea
Thu May 22, 2008 8:53 pm
Forum: Emulators
Topic: Testing Emulators.
Replies: 23
Views: 16099

Re: Testing Emulators.

Whooey i finally worked out how to make a standalone !!! its only took me a few days. anyhows here it is http://dl4u.savefile.com/f165c0a854d78b51e9812975edb303f8/AR81.rar or here http://www.savefile.com/files/1568013 So the quick instructions, unrar into a folder of your choice and run the exe. aft...
by Andy Rea
Thu May 22, 2008 5:09 pm
Forum: Emulators
Topic: Testing Emulators.
Replies: 23
Views: 16099

Re: Testing Emulators.

Thanks for that Mike, i haven't even implemented im mode 2 so i'll take a look at it and see what i can do. regards Andy Additionally a Question. is the ZX81 databus always $FF when idle and expecting part of the interupt vector on it in IM2 ? Thanks. Well that was easy, IM2 now implemented... QSDEF...