Search found 11 matches

by daveZX4th
Wed Mar 21, 2018 12:59 pm
Forum: Development
Topic: ROM hacking
Replies: 8
Views: 6162

Re: ROM hacking

I can see how ZX97 adds new commands (albeit via FUNCTION 0-9) by adding CALL's in syntax and scanning etc. But I don't see how you can (as easily) add true functions (ie. unary like PEEK). I wanted to add IN (& OUT) but have had to resort to using PEEK (& POKE). If address is <256 then do IN or OUT...
by daveZX4th
Thu Jan 18, 2018 1:08 pm
Forum: Development
Topic: AY-3-8910 (AY/YM) music generation?
Replies: 23
Views: 5564

Re: AY-3-8910 (AY/YM) music generation?

For anyone with a QL & ZX81 here's the Basic I used to convert STC to SNG.
by daveZX4th
Thu Jan 11, 2018 4:05 pm
Forum: Development
Topic: AY-3-8910 (AY/YM) music generation?
Replies: 23
Views: 5564

Re: AY-3-8910 (AY/YM) music generation?

Ah, I didn't think to try pressing BREAK...

Excellent, I've got 32K battery backed RAM 8K-paged at 40-48K (for H4th Forth block filing). I can use that for temporary data.
by daveZX4th
Thu Jan 11, 2018 2:55 pm
Forum: Development
Topic: AY-3-8910 (AY/YM) music generation?
Replies: 23
Views: 5564

Re: AY-3-8910 (AY/YM) music generation?

Hi Tim, I'll tidy my ZX81 STC/SNG programs so they don't require my QL set up. I've also done programs to list completely contents of STC & SNG files, which make it easier to peruse song and samples/ornaments. Re ZX81 Tracker, I've only used it on EightyOne since (IIRC) it needs ZXpand for filing. M...
by daveZX4th
Mon Jan 08, 2018 1:53 pm
Forum: Development
Topic: AY-3-8910 (AY/YM) music generation?
Replies: 23
Views: 5564

Re: AY-3-8910 (AY/YM) music generation?

Moggy wrote : Again excellent work which hopefully will inspire others to create new music I must admit I found Andy's ZX81 SoundTracker much easier to use than Spectrum original. Waiting for pointer movement and getting it exactly in right place was tedious, and put me off using it in the past. And...
by daveZX4th
Mon Jan 08, 2018 1:49 pm
Forum: Development
Topic: AY-3-8910 (AY/YM) music generation?
Replies: 23
Views: 5564

Re: AY-3-8910 (AY/YM) music generation?

Glad to hear it. :D

Attached all of them, with dates same as STC files.

Only 18/1513 would not decompile, and 16 of them were due to too many pattern lines - SNG file max is 64 per pattern. Though STC player will cope with them OK.
by daveZX4th
Sat Jan 06, 2018 1:28 pm
Forum: Development
Topic: AY-3-8910 (AY/YM) music generation?
Replies: 23
Views: 5564

Re: AY-3-8910 (AY/YM) music generation?

Moggy, thanks for making huge STC file archive available, appreciated. Here's my first attempt at batch decompiling them back to SNG files (first 500, a few bad apples missing). I'll see if I can refine the process, including retaining the date stamping from original STC files. I need to try them ou...
by daveZX4th
Tue Jan 02, 2018 3:44 pm
Forum: Development
Topic: AY music menu/player
Replies: 17
Views: 4432

Re: AY music menu/player

Thanks Andy, your source reduced what would have been a week or two of head scratching to about one day :-) Though I was a bit puzzled with the CLEAR_AY_ENV_SHAPE routine until I realised it would have to deal with false retriggering of the AY envelope. Here's my take on it: CHANNEL_1_PROG_STORE_MIN...
by daveZX4th
Wed Dec 27, 2017 1:27 pm
Forum: Development
Topic: AY music menu/player
Replies: 17
Views: 4432

Re: AY music menu/player

Thanks, I've just downloaded zedragon and will have a look. Just need to relocate code to a suitable place for H4th.
by daveZX4th
Fri Dec 22, 2017 1:19 pm
Forum: Development
Topic: AY music menu/player
Replies: 17
Views: 4432

Re: AY music menu/player

I'd like do a version of STC player for Tree/H4th ZX81Forth. I'm familiar with STC file format and have done a quick disassembly of JUK.P but it would make life a lot easier if the source was available ;) What makes it easier is H4th has a user frame counter which can action a routine when exhausted.