Search found 77 matches
- Mon Jul 15, 2019 4:54 pm
- Forum: Hardware
- Topic: EPROM models for 8K ZX80 ROM
- Replies: 2
- Views: 1907
Re: EPROM models for 8K ZX80 ROM
Mutant Caterpillar is going to do some for me.
- Mon Jul 15, 2019 1:00 pm
- Forum: Hardware
- Topic: Jailbars on ZX80
- Replies: 4
- Views: 2585
Re: Jailbars on ZX80
Thanks as always 1024! I'll try your suggestions.
- Sun Jul 14, 2019 1:07 pm
- Forum: Hardware
- Topic: EPROM models for 8K ZX80 ROM
- Replies: 2
- Views: 1907
EPROM models for 8K ZX80 ROM
Possible dumb question,
I'd like to have an 8K BASIC ROM burned for my ZX80. What model EPROM should I ask for? 2364 or pin-compatible modern replacement?
I'd like to have an 8K BASIC ROM burned for my ZX80. What model EPROM should I ask for? 2364 or pin-compatible modern replacement?
- Sun Jul 14, 2019 12:41 pm
- Forum: WANTED
- Topic: 8K BASIC ROM for ZX80
- Replies: 6
- Views: 7318
Re: 8K BASIC ROM for ZX80
ThanksLardo Boffin wrote: ↑Tue Jul 09, 2019 8:02 pm Mutant Caterpillar Games may be able to help.
http://www.mutant-caterpillar.co.uk/
- Sun Jul 14, 2019 12:40 pm
- Forum: Hardware
- Topic: Jailbars on ZX80
- Replies: 4
- Views: 2585
Re: Jailbars on ZX80
Strategically placed 100nF capacitors over the power rails of U9 and U20 made for some improvement.
- Sat Jul 13, 2019 7:27 pm
- Forum: Hardware
- Topic: Identifying Board Version
- Replies: 3
- Views: 4201
Re: Identifying Board Version
Thank you
- Sat Jul 13, 2019 7:22 pm
- Forum: Hardware
- Topic: Jailbars on ZX80
- Replies: 4
- Views: 2585
Jailbars on ZX80
Does anyone have any suggestions on how I can eliminate or reduce the "jail bar" effect present on my ZX80s composite output?
http://www.myprius.co.za/jailbar.JPG
http://www.myprius.co.za/jailbar.JPG
- Sat Jul 13, 2019 6:57 pm
- Forum: Hardware
- Topic: Interference in Composite
- Replies: 3
- Views: 3533
Re: Interference in Composite
Could you please help and point me to a schematic so I can see which components you refer to? Thank you for all your help.
- Sat Jul 13, 2019 5:36 pm
- Forum: Hardware
- Topic: Data interface on ZX
- Replies: 2
- Views: 2767
Re: Data interface on ZX
I was actually gifted recently three or four 8250 UARTs. Could they be useful?
I can program an Arduino to do conversion too. I was just looking for ideas. Thanks 1024!
I can program an Arduino to do conversion too. I was just looking for ideas. Thanks 1024!
- Sat Jul 13, 2019 5:32 pm
- Forum: Hardware
- Topic: Interference in Composite
- Replies: 3
- Views: 3533
Interference in Composite
Hi, I made a plugin adapter to tap the composite video signal from the PCB edge connector on my Spectrum. I got video, but there is a herringbone type interference and like a speckle noise. I figured it might be because the modulator was still active so I snipped its power line, but still, the compo...