Search found 1142 matches

by mrtinb
Wed Jan 15, 2020 12:21 pm
Forum: FAQs
Topic: ZX81 as a ZX80 by just changing ROM?
Replies: 4
Views: 188

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: 188

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: 182

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: 252

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: 196

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: 196

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: 19468

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: 1081

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...
by mrtinb
Wed Jan 08, 2020 9:07 pm
Forum: Development
Topic: ZX81 Clone Tynemouth Minstrel 3
Replies: 18
Views: 1199

Re: ZX81 Clone Tynemouth Minstrel 3

You cannot have RAM enabled in the same area on the Minstrel and the Chroma. Chroma has DIP switches for this. Maybe the Minstrel has some jumpers for this setting on its device. However Chroma might need to have RAM enabled where screen and color is stored, for video output to work through the Chro...
by mrtinb
Fri Jan 03, 2020 7:02 am
Forum: Hardware
Topic: Which ROM for Minstrel 3?
Replies: 21
Views: 685

Re: Which ROM for Minstrel 3?

And again Mark’s invaluable help, knowledge and kindness to help.