Search found 2060 matches

by dr beep
Fri Mar 08, 2024 1:43 pm
Forum: Hardware
Topic: RAM speed issue
Replies: 29
Views: 1111

Re: RAM speed issue

The lowres display is ok, problem is in the hiresdisplay.
by dr beep
Fri Mar 08, 2024 1:42 pm
Forum: Hardware
Topic: RAM speed issue
Replies: 29
Views: 1111

Re: RAM speed issue

This game is the first to use executable code in upper memory, but that should not be the problem
by dr beep
Fri Mar 08, 2024 5:41 am
Forum: Development
Topic: ZX81, Alternate Register Pair HL' Used By System?
Replies: 9
Views: 2403

Re: ZX81, Alternate Register Pair HL' Used By System?

I think it interesting that this detail is conspicuously missing from the ZX81 User Manual, especially when it addresses which registers not to mess with. It doesn't seem like such a minor detail to me. The manual also doesn't mention the use of IX or A' which you can only use in a special way. IX ...
by dr beep
Thu Mar 07, 2024 6:23 pm
Forum: Development
Topic: ZX81, Alternate Register Pair HL' Used By System?
Replies: 9
Views: 2403

Re: ZX81, Alternate Register Pair HL' Used By System?

stroebeljc wrote: Thu Mar 07, 2024 6:04 pm HL' is used by the FP calculator when machine code is launched using USR in BASIC. So you need to do what dr beep says and save-and-restore it.
Wow.... a 2015 thread revived!
Well if it helps anyone, why not!
by dr beep
Thu Mar 07, 2024 1:32 pm
Forum: Development
Topic: PACMAN 1K
Replies: 27
Views: 4720

Re: PACMAN 1K

Latest version now gives a bonuslife every 10.000 points.
by dr beep
Wed Mar 06, 2024 10:26 pm
Forum: GAMES
Topic: New ZX81 Games
Replies: 363
Views: 682319

Re: New 1K Games : K-MAN (free edition)

Name of Software: K-MAN Author: Johan "Dr Beep" Koelman Release Date: 06/03/2024 Requirements (eg. 1K, 16K, AY Card, Hi-Res Scheme): 1K lowres Commercial / Public Domain / Free ware / Other - please specify? Freeware Description: 1K pacman NOW WITH BONUS LIVE EACH 10.000 points Downloadlink: K-man-b...
by dr beep
Mon Mar 04, 2024 1:43 pm
Forum: Development
Topic: PACMAN 1K
Replies: 27
Views: 4720

Re: PACMAN 1K

Crayon21 wrote: Fri Mar 03, 2023 7:46 pm listing please. Also, hello God :shock:
https://www.sinclairzxworld.com/viewtop ... 248#p54248
by dr beep
Thu Feb 29, 2024 10:44 pm
Forum: ZX BASIC
Topic: multi-statement in zx81 basic?
Replies: 5
Views: 384

Re: multi-statement in zx81 basic?

msknight wrote: Thu Feb 29, 2024 9:28 pm Thanks for confirming. Just going to have to write more code :-)

Easiest is
IF condition THEN GO SUB linenumber

and at linenumber code mutiple lines and end with RETURN
by dr beep
Thu Feb 29, 2024 6:45 pm
Forum: GAMES
Topic: What's happened to revival studios?
Replies: 7
Views: 597

Re: What's happened to revival studios?

msknight wrote: Thu Feb 29, 2024 5:06 pm I can't find that handle on Discord. Perhaps there's still a #number after it?
Info on DISCORD

superogue#0159
by dr beep
Thu Feb 29, 2024 4:27 pm
Forum: GAMES
Topic: What's happened to revival studios?
Replies: 7
Views: 597

Re: What's happened to revival studios?

If you have DISCORD you could contact SUPEROGUE, That is him!