40 SMD micro switches later and I now have the keyboard mounted on the zx80core.
Absolutely fantastic.
G
Search found 91 matches
- Fri May 23, 2014 10:40 pm
- Forum: Development
- Topic: ZX80 Core - new ZX80 motherboards
- Replies: 259
- Views: 73294
- Tue May 20, 2014 3:30 pm
- Forum: Development
- Topic: ZX80 Core - new ZX80 motherboards
- Replies: 259
- Views: 73294
Re: ZX80 Core - new ZX80 motherboards
*goes off to find his white stick*
- Tue May 20, 2014 2:57 pm
- Forum: Development
- Topic: ZX80 Core - new ZX80 motherboards
- Replies: 259
- Views: 73294
Re: ZX80 Core - new ZX80 motherboards
I am probably being really blind, but the Composite/Phono socket is missing from the parts list. I guess thats because it doesn't have a JXX number on the board.
G
G
- Sun May 18, 2014 6:56 pm
- Forum: Development
- Topic: ZX80 Core - new ZX80 motherboards
- Replies: 259
- Views: 73294
Re: ZX80 Core - new ZX80 motherboards
The place where you put the v1.0 manuals seems to be down, I should really get my v1.0b board up and running as well 

- Sun May 18, 2014 12:50 am
- Forum: Development
- Topic: ZX80 Core - new ZX80 motherboards
- Replies: 259
- Views: 73294
Re: ZX80 Core - new ZX80 motherboards
As a bonus this was the first time I had a chance to use logic analiser properly since I bought it years ago 

- Sun May 18, 2014 12:47 am
- Forum: Development
- Topic: ZX80 Core - new ZX80 motherboards
- Replies: 259
- Views: 73294
Re: ZX80 Core - new ZX80 motherboards
About the SMD capacitors - I gave one more 10uF just to have a different amount of each capacitor value to distinct them. Unfortunately the values are not printed on. Yeah, I just got over eager and soldered the two, I went back and checked the parts list and realised what I had done. Now I need to...
- Sat May 17, 2014 11:54 pm
- Forum: Development
- Topic: ZX80 Core - new ZX80 motherboards
- Replies: 259
- Views: 73294
Re: ZX80 Core - new ZX80 motherboards
Found it, got confused with the SMD caps and fitted C97 with a 10uF, replaced with the 1nF and I have the magic K 

- Sat May 17, 2014 10:16 pm
- Forum: Development
- Topic: ZX80 Core - new ZX80 motherboards
- Replies: 259
- Views: 73294
Re: ZX80 Core - new ZX80 motherboards
Sync
Pixel
I have the bottom two positions of J96 (NMI) jumpered, top of J98.
Am I supposed to do anything with J94? Instructions are a little confusing around that, I have fitted SMDs to back, TV seems happy with signal apart from it being all black.
- Sat May 17, 2014 8:13 pm
- Forum: Development
- Topic: ZX80 Core - new ZX80 motherboards
- Replies: 259
- Views: 73294
Re: ZX80 Core - new ZX80 motherboards
Built my zx80core today \o/
Unfortunately it is a bit too goth for me in that in only outputs black on black
My A15 seems to agree with the debugging guide.
I do not currently have access to my Oscilloscope only USB logic analyser
Unfortunately it is a bit too goth for me in that in only outputs black on black

My A15 seems to agree with the debugging guide.
I do not currently have access to my Oscilloscope only USB logic analyser

- Mon May 12, 2014 11:25 am
- Forum: Hardware
- Topic: looking for someone in London to help me troubleshoot a ZX81
- Replies: 22
- Views: 4375
Re: looking for someone in London to help me troubleshoot a
That easycap really struggles with the non-standard signals from most retro computers, I will be surprised if you get a valid pic from a zx81 
