Search found 2135 matches

by Moggy
Sun Nov 29, 2020 8:28 pm
Forum: ZX BASIC
Topic: Replacing numbers with a full stop.
Replies: 5
Views: 116

Re: Replacing numbers with a full stop.

Ha I see so when declaring variables for example such as,LET A=0,LET B=0 etc the six byte overhead that using a zero causes can be saved by using the full stop instead.
by Moggy
Sun Nov 29, 2020 8:18 pm
Forum: Welcome Area
Topic: Great to meet you
Replies: 24
Views: 995

Re: Great to meet you

You might want to post this on the German ZX forum too as there is a lot of ZX80 interest on that forum,some of their members do look here occasionally as well.

https://forum.tlienhard.com/phpBB3/view ... hp?f=2&f=2
by Moggy
Sun Nov 29, 2020 5:00 pm
Forum: ZX BASIC
Topic: Replacing numbers with a full stop.
Replies: 5
Views: 116

Replacing numbers with a full stop.

Taken from a PDF I've been reading Saving Memory on the Sinclair ZX81Sean A. Irvine Hamilton, New Zealand. "Another oddity is that an isolated period (.) is a valid representation for 0 on the ZX81.Therefore, it was possible to go through a program after it was written and compress out all but one o...
by Moggy
Sat Nov 28, 2020 7:19 pm
Forum: Welcome Area
Topic: Great to meet you
Replies: 24
Views: 995

Re: Great to meet you

Bloody lovely! :D

A ZX80 ready for business, nice one JonnyGee.
by Moggy
Wed Nov 25, 2020 10:24 pm
Forum: GAMES
Topic: DANGERMAN UDG
Replies: 1
Views: 421

DANGERMAN UDG

Another one of the type in games that XavSnap has been contributing. This one is called DANGERMAN and from what I can make out it seems you are a jolly riveter climbing all over the site hammering home the rivets to earn an honest days pay whilst looking out for the wind that can blow you away. Curs...
by Moggy
Mon Nov 23, 2020 7:47 pm
Forum: Hardware
Topic: Fixing inherited Sinclair ZX81
Replies: 30
Views: 1494

Re: Fixing inherited Sinclair ZX81

Another one lives well done Mikeyp. :D

Add a switching reg to it and it will run a damn sight cooler and should last for ages.
by Moggy
Mon Nov 23, 2020 6:37 pm
Forum: Software
Topic: Pascal for ZX81
Replies: 6
Views: 389

Re: Pascal for ZX81

Partial pascal readily available but unfortunately no manual.
by Moggy
Sun Nov 22, 2020 10:30 pm
Forum: SALES
Topic: Composite boards for sale.
Replies: 3
Views: 227

Re: Composite boards for sale.

Lardo Boffin wrote: Sun Nov 22, 2020 7:18 pm Always interesting to see another comp mod board. It also always makes me wonder how Pokemon can do such a good board for so little!
I think it's because he doesn't do it for profit and only covers his costs.
by Moggy
Sun Nov 22, 2020 3:03 pm
Forum: SALES
Topic: Composite boards for sale.
Replies: 3
Views: 227

Composite boards for sale.

I have no link to seller just thought it may be useful.

Does not say whether back porch generated but as the sample picture shows 158c ULA then would assume it does.

https://www.ebay.co.uk/itm/ZX81-Composi ... SwLAtfuWl7