Search found 261 matches

by AndyC
Sun Feb 16, 2020 9:19 am
Forum: Hardware
Topic: ZX Spectrum Next Discussion
Replies: 292
Views: 22937

Re: ZX Spectrum Next Discussion

Alcoholics Anonymous wrote:
Sun Feb 16, 2020 2:43 am
llewelyn wrote:
Sun Feb 16, 2020 12:09 am
What do you mean? Like FOR/NEXT? How could you not have that?
The basic is extended and includes things like repeat/until, while and procs. The syntax is a little odd for repeat/until but I'm sure garry had a good reason for it.
I think it was WHILE loops that looked most odd to me.
by AndyC
Wed Feb 12, 2020 7:24 am
Forum: Programming
Topic: Keeping track of registers
Replies: 43
Views: 1465

Re: Keeping track of registers

In terms of performance, which would be preferred? push/pop af or ex af? http://clrhome.org/table/ Okay, beginner level question... what is a t-state? Is it just a clock cycle? So for a 3.5Mz processor, there would be (counts fingers) about 70,000 t-states per frame at 50 fps? And checking if your ...
by AndyC
Sun Feb 09, 2020 9:21 am
Forum: Programming
Topic: Keeping track of registers
Replies: 43
Views: 1465

Re: Keeping track of registers

Ahh, lack of good detail in comments in the code. Guaranteed to cause problems weeks, months or years later.... Mark Or even days or hours later.. :) I actually sometimes wonder if it's possible to over comment the code. Occasionally it feels as though I'm having to wade through a ton of verbose ex...
by AndyC
Sun Feb 02, 2020 11:07 am
Forum: Games/Software
Topic: Best Selling Spectrum Game
Replies: 24
Views: 2058

Re: Best Selling Spectrum Game

It was really great. I'd have been disappointed with it at a budget price. At best, it'd be interesting as a magazine covertape inclusion. Bought it full price and I was quite satisfied. Better than the coin op conversion, with its trite and repetitive smash-everybody gameplay. The coin op game wor...
by AndyC
Fri Jan 17, 2020 7:36 pm
Forum: Programming
Topic: Learning Machine Code
Replies: 36
Views: 1336

Re: Learning Machine Code

Another trick is to start your code with a series of JP instructions to the entry points. Since each is three bytes long the addresses are easily predictable and won't move each time you reassemble the listing.
by AndyC
Sat Jan 11, 2020 5:31 pm
Forum: Sinclair Miscellaneous
Topic: +3 sound quality?
Replies: 10
Views: 341

Re: +3 sound quality?

Isn't the beeper thing intentional? The manual describes the beeper volume as being as loud as all three AY channels at full volume.
by AndyC
Tue Jan 07, 2020 7:09 pm
Forum: Announcements
Topic: Royal Mail Retro video games stamps
Replies: 12
Views: 616

Re: Royal Mail Retro video games stamps

I thought Dizzy was birthed on the Amstrad so wouldn’t it be more accurate to include the Amstrad version rather than our beloved Speccy one though? This is something of a misnomer. It was written on the Amstrad, but it's clear that the primary target platform is the Speccy. Inside the code for the...
by AndyC
Thu Jan 02, 2020 5:00 am
Forum: Hardware
Topic: 128K toastrack manuals
Replies: 8
Views: 326

Re: 128K toastrack manuals

I had a 16K, then a 48K+ and finally (till now) a +2A and I do remember the + model having a very flimsy manual that really didn't tell you how to use BASIC at all. I don't know if Sinclair were perhaps selling the old manual separately or whether they had given up, assuming most users just wanted t...
by AndyC
Sat Dec 21, 2019 10:59 am
Forum: Games/Software
Topic: The best Speccy game by Players Premier: vote
Replies: 13
Views: 545

Re: The best Speccy game by Players Premier: vote

Many of these are 1989 or 1990 going by the years in the loading screens. I had definately moved on before these. They look like a decent bunch of games though. IIRC Players Premier was the "premium" budget label for Players in the later days, priced something like £1 higher than their other titles...
by AndyC
Tue Dec 17, 2019 7:41 am
Forum: Games/Software
Topic: The best Speccy game by Players Premier: vote
Replies: 13
Views: 545

Re: The best Speccy game by Players Premier: vote

Has to be Spooked, that was a great game. Although the only others I remember are Vatman and Robinson At, both of which were obviously aimed at selling Joe Blade 3!