Search found 1905 matches

by mrtinb
Sun Feb 11, 2024 10:47 am
Forum: GAMES
Topic: K-man released as source only
Replies: 2
Views: 381

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: 2478

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: 760

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: 711

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: 711

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: 3872

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: 729

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: 1091

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
by mrtinb
Fri Jan 19, 2024 10:28 pm
Forum: Hardware
Topic: Internal RAM and then ZXpand or Chroma Interface?
Replies: 8
Views: 987

Re: Internal RAM and then ZXpand or Chroma Interface?

You have conflict in the address space. I'm not an electronics expert, but I believe two different signal is comming to the bus at the same time, which makes it a coincident who is winning the signal competition. At best the Zeddy wont work. At worst you destoy one of the chips. Anyone please correc...
by mrtinb
Fri Jan 19, 2024 8:52 am
Forum: Hardware
Topic: I've recorded what I've learned
Replies: 15
Views: 1497

Re: I've recorded what I've learned

That's a good resource you've gathered. Maybe you should add a link to it in your signature. You can simply add a signature to all your post in you profile here at the forum. This would make it easy for us to find the link, because we just need to find one of your posts.