Search found 3 matches

by ekaww
Fri Jul 30, 2021 5:18 pm
Forum: Hardware
Topic: SLOW MODE issue
Replies: 4
Views: 1454

Re: SLOW MODE issue

Hi Paul,

What's the line counter in your ZX80 replica? The counter of mine is 74LS393.
I have attached the slow mode schematic and I checked and re-checked several times.
by ekaww
Thu Jul 29, 2021 10:14 pm
Forum: Hardware
Topic: SLOW MODE issue
Replies: 4
Views: 1454

SLOW MODE issue

I have built a similar replica of ZX80 w/ slow mode. It’s working fine but has only one issue when working in slow mode.
Both inverse and graphic caracteres are missing a line over the caracter as you can see in the Picture.
Has anyone ever seen this problem?
by ekaww
Tue Jun 05, 2018 1:17 am
Forum: Development
Topic: ZX81 ULA-in-a-CPLD
Replies: 238
Views: 132577

Re: ZX81 ULA-in-a-CPLD

Great job Andy!

I want to buy one!