Search found 251 matches

by GCHarder
Fri Dec 06, 2019 11:24 pm
Forum: GAMES
Topic: Pac man on the ZX81
Replies: 12
Views: 6220

Re: Pac man on the ZX81

There are literally dozens of versions, commercial and mag type-ins. All the early 80's arcade hits had ZX81 versions, Defender, Scramble...etc. There are probably 20 or more versions of Space Invaders. Of course the quality varies greatly. Most of these are available in the ZX81 software collection...
by GCHarder
Sat Nov 30, 2019 7:55 pm
Forum: ZX BASIC
Topic: HLIN & VLIN BASIC extensions
Replies: 2
Views: 2057

HLIN & VLIN BASIC extensions

Versions of Applesoft's HLIN and VLIN commands for the ZX81.

See enclosed .txt file for more info.

Regards;

Greg
HLinVLin.zip
Source and demo
(6.34 KiB) Downloaded 79 times
by GCHarder
Mon Nov 25, 2019 11:12 pm
Forum: Emulators
Topic: [Vb81] Test release.
Replies: 25
Views: 12078

Re: [Vb81] Disassembler Window

If not too hard would it be possible to make the disassembler window resizable? I find it a bit constricting, especially when the contents of the registers are being shown. I'd also like to see wider columns, these are sizable, but restricted because of the size of the main window. Just a suggestion...
by GCHarder
Mon Nov 04, 2019 11:20 pm
Forum: Sinclair Misc
Topic: ZX81 Academic and Research related articles!
Replies: 1
Views: 2035

ZX81 Academic and Research related articles!

https://www.tandfonline.com/action/doSearch?AllField=zx81 Most of these are "Locked", so you can only read the abstracts, which gives you the idea. You can pay to get access if you want. A few are "Open Access", like the Quicksilva article I posted yesterday. Here's another one https://www.tandfonli...
by GCHarder
Sun Nov 03, 2019 11:50 pm
Forum: Sinclair Misc
Topic: Quicksilva article
Replies: 1
Views: 1912

Quicksilva article

Hope this hasn't been posted before, the article was uploaded in 2016, so it's pretty new.

https://www.tandfonline.com/doi/full/10 ... 16.1190441

First hand account of working for Quicksilva. Lots of interesting information. Nice downloadable PDF available.

Regards;

Greg
by GCHarder
Thu Oct 31, 2019 9:19 pm
Forum: Sinclair Misc
Topic: Machine Language help
Replies: 4
Views: 3424

Re: Machine Language help

Using the ROMs find line address routine at 09D8 LINE-ADDR. may work better. or not, for your REM loop. For a given BASIC line number this subroutine will return the starting address of the actual line or the starting address of the following line if it does not exist (C reset). 09D8 LINE-ADDR PUSH ...
by GCHarder
Mon Oct 21, 2019 10:44 pm
Forum: Emulators
Topic: [Vb81] Test release.
Replies: 25
Views: 12078

Re: [Vb81] Text Compiler Bug

This line...
10 LET X=16623

Produces a false error message!

This line...

10 LET X=Val "16623"

Avoids the error message.

I've seen this bug before with other values as well, weird huh.

See the attached.

Regards;

Greg
by GCHarder
Thu Oct 17, 2019 10:51 pm
Forum: Welcome Area
Topic: Hello from Nottingham, UK.
Replies: 21
Views: 4539

Re: Hello from Nottingham, UK.

Before you type anything in check out the "Type Fantastic" web site.

www.users.globalnet.co.uk/~jg27paw4/typ ... pehome.htm

Regards;

Greg
by GCHarder
Thu Oct 17, 2019 1:27 am
Forum: Welcome Area
Topic: Hello from Nottingham, UK.
Replies: 21
Views: 4539

Re: Hello from Nottingham, UK.

High Rise Hive is a HogRogProg game. See HogRogProg Collection in the games forum for more great games by them. I really like Bug Burst myself.

Regards;

Greg
by GCHarder
Wed Oct 16, 2019 9:46 pm
Forum: Software
Topic: ZXPand Organizer
Replies: 17
Views: 5998

Re: ZXPand Organizer

I've updated the program with line... 9997 IF PEEK 49151>MAX THEN POKE 49151,0 Also the HogRogProg and Benham Disk programs. This should work as long as the VARS have been initialized before saving. BTW, what value do you get when you PEEK 49151? I guess the T/S1000 and ZX81 aren't 100% compatible! ...