Search found 1144 matches

by mrtinb
Thu Jan 23, 2020 6:52 am
Forum: Hardware
Topic: Sparkly pixels
Replies: 6
Views: 102

Re: Sparkly pixels

It sounds like the problem I had when connecting the ZXpand to a Lambda 8300. Then random chars would appear someplace on the screen. They weren’t wrong in RAM but only on screen.

I guess it’s some sort of timing issue with the ZXpand, as there’s no issue when a regular Sinclair 16K is used.
by mrtinb
Mon Jan 20, 2020 3:52 pm
Forum: WANTED
Topic: SD card reader for ZX81
Replies: 11
Views: 596

Re: SD card reader for ZX81

And they went fast.
by mrtinb
Wed Jan 15, 2020 12:21 pm
Forum: FAQs
Topic: ZX81 as a ZX80 by just changing ROM?
Replies: 4
Views: 332

Re: ZX81 as a ZX80 by just changing ROM?

Thank you for your thorough answer. :)
by mrtinb
Wed Jan 15, 2020 10:12 am
Forum: FAQs
Topic: ZX81 as a ZX80 by just changing ROM?
Replies: 4
Views: 332

ZX81 as a ZX80 by just changing ROM?

Since ZX80 and ZX81 are much alike. The ZX81 has added NMI/Sync.

So can I get my ZX81 to act exactly as a ZX80 by just changing the ROM?
by mrtinb
Wed Jan 15, 2020 6:22 am
Forum: ZX BASIC
Topic: Fruitz - another Fruit Machine-alike clone
Replies: 2
Views: 219

Re: Fruitz - another Fruit Machine-alike clone

My “The ZX81 Pocket Book” is written by Trevor Toms.
by mrtinb
Tue Jan 14, 2020 10:11 pm
Forum: ZX BASIC
Topic: Resizing the screen (number of lines)
Replies: 7
Views: 429

Re: Resizing the screen (number of lines)

With this software from Wilf Rigter, can set the screen to any size, and giving more time to run code. When less time is used for display, then more can be used for code.

http://www.user.dccnet.com/wrigter/inde ... va2005.htm
by mrtinb
Sat Jan 11, 2020 7:00 pm
Forum: WANTED
Topic: ZX8-CCB, where's Karl-Heinz?
Replies: 5
Views: 224

Re: ZX8-CCB, where's Karl-Heinz?

Bought one from him 25.09 this year. So I think he puts new supplies on SellMyRetro from time to time.
by mrtinb
Sat Jan 11, 2020 6:43 pm
Forum: WANTED
Topic: ZX8-CCB, where's Karl-Heinz?
Replies: 5
Views: 224

Re: ZX8-CCB, where's Karl-Heinz?

Last I heard he was busy putting food on the table.
by mrtinb
Fri Jan 10, 2020 11:13 pm
Forum: Hardware
Topic: looking for Jarek Adamski
Replies: 34
Views: 19607

Re: looking for Jarek Adamski

Please tell us if it’s working.
by mrtinb
Thu Jan 09, 2020 6:51 am
Forum: ZX BASIC
Topic: Started learning Machine code: Am i doing this correctly?
Replies: 15
Views: 1110

Re: Started learning Machine code: Am i doing this correctly?

:oops: "26" n/l "00" n/l "2E" n/l "2A" n/l "C9" n/l "S" n/l RAND USR 30000 Not: "2600" n/l "2E2A" n/l "C9" n/l "S" n/l RAND USR 30000 I would assume they would give the same results. If you use LD B,01 LD C,02 RET You can get the output to Basic with PRINT USR 30000 PRINT USR 30000 would in this ca...