Search found 1897 matches

by mrtinb
Tue Feb 20, 2024 10:36 pm
Forum: Emulators
Topic: Best web browser based ZX 80 or ZX 81 emulator
Replies: 2
Views: 165

Re: Best web browser based ZX 80 or ZX 81 emulator

I believe the best one is here.

It will work with your own files, and support more hardware.

https://www.weggetjes.nl/jszeddy/jszeddy.html
by mrtinb
Mon Feb 19, 2024 10:25 pm
Forum: WANTED
Topic: WANTED: Memotech Memopak RS232 Interface
Replies: 3
Views: 4984

Re: WANTED: Memotech Memopak RS232 Interface

It seems they are quite rare. I've never seen one on eBay the last 10 years I've collected Sinclair. I don't know if anyone on this forum has one. If they have, they would cherish it, and not part with it.
by mrtinb
Sun Feb 11, 2024 10:47 am
Forum: GAMES
Topic: K-man released as source only
Replies: 2
Views: 257

Re: K-man released as source only

Always a pleasure to see your work.
by mrtinb
Tue Jan 30, 2024 3:52 pm
Forum: Hardware
Topic: Any other source of ZXpand+ ?
Replies: 18
Views: 2201

Re: Any other source of ZXpand+ ?

Well the main problem with the ZX-Wespi is that you always have to load a menu, and select your program from the menu. That does not work with programs, that loads another file. That is because loading any file will load the menu. However there exist a version of the firmware on the German forum, th...
by mrtinb
Fri Jan 26, 2024 8:53 pm
Forum: Hardware
Topic: 90 degree card connector?
Replies: 4
Views: 685

Re: 90 degree card connector?

I bought these.

Please note, that any edge connector has closed sides. That means it will not fit the ZX81. You need to cut off the sides with a Dremel or the like, to connect it to the ZX81.


https://www.aliexpress.com/item/4001146953252.html
by mrtinb
Thu Jan 25, 2024 7:19 pm
Forum: Development
Topic: Using WAIT signal?
Replies: 3
Views: 619

Re: Using WAIT signal?

Thank you Paul and Mark for your great response.
by mrtinb
Thu Jan 25, 2024 3:11 pm
Forum: Development
Topic: Using WAIT signal?
Replies: 3
Views: 619

Using WAIT signal?

Hi!

If I'm creating a new circuit to connect to the ZX81 is it possible to:
  1. Pull the WAIT signal LOW
  2. Update the RAM of the ZX81
  3. Release the WAIT signal
and then the RAM is updated by the external circuit.

Is that possible?
by mrtinb
Thu Jan 25, 2024 3:04 pm
Forum: Sinclair Misc
Topic: Spectrum Next Issue 2 Unboxing Video
Replies: 28
Views: 3078

Re: Spectrum Next Issue 2 Unboxing Video

Maybe this topic should be moved to the Spectrum section. :ugeek:
by mrtinb
Wed Jan 24, 2024 1:49 pm
Forum: Hardware
Topic: Preferred SD Card for ZXpand+
Replies: 5
Views: 662

Re: Preferred SD Card for ZXpand+

I believe using the SD-Formatter program to format your card before usage is a good idea. I believe there is also an issue that firmware cannot be updated from a large SD-card. I think the firmware update might only work on a SD card formatted with FAT16. I cannot remember. I just know I have an old...
by mrtinb
Sun Jan 21, 2024 1:23 pm
Forum: Hardware
Topic: Desoldering heat gun
Replies: 9
Views: 1014

Re: Desoldering heat gun

I have one of these, that with an electro magnet suck once, and when you release the button, blows all solder out again. So it's not very good. However it's better than none at all.

https://a.co/d/hodRSQB