Search found 1030 matches

by Paul
Thu Oct 10, 2019 3:02 pm
Forum: Hardware
Topic: Hack to get 5V for keyboard
Replies: 15
Views: 486

Re: Hack to get 5V for keyboard

As SMD I didn’t find electrolyte capacitors In your use case it's not necessary to use a polarized capacitor. Any 4u7 capacitor will do. In SMD you find larger non polarized capacitors than in through hole. Kind regards Paul P. S. https://m.reichelt.de/Elkos-SMD-Low-ESR-105-C/2/index.html?ACTION=2&...
by Paul
Wed Oct 02, 2019 9:34 pm
Forum: Hardware
Topic: ZX80 trouble shooting
Replies: 37
Views: 1708

Re: ZX80 trouble shooting

Searching for ZX80 ramtop with Google found
PRINT PEEK 16388 + 256 * PEEK 16389 NEW LINE
by Paul
Wed Oct 02, 2019 8:06 pm
Forum: Hardware
Topic: ZX80 trouble shooting
Replies: 37
Views: 1708

Re: ZX80 trouble shooting

Yes it recognizes it. 1 to 16 k are valid.
Kind regards Paul
by Paul
Wed Sep 25, 2019 10:12 pm
Forum: Hardware
Topic: Non working ZX81
Replies: 20
Views: 793

Re: Non working ZX81

He found the appropriate thread.
Kind regards Paul
by Paul
Mon Sep 23, 2019 2:08 pm
Forum: Hardware
Topic: Hack to get 5V for keyboard
Replies: 15
Views: 486

Re: Hack to get 5V for keyboard

You could have a closer look at the 48p-kdlx from Pokémon. He enables extra keys without extra lines (just 8+5) and makes energy harvesting from the keyboard lines. He uses low power ICs for this. There is a Schematic in the tlienhard forum. Kind regards Paul Edit: name correction and specify the pr...
by Paul
Tue Sep 17, 2019 9:18 am
Forum: Hardware
Topic: Repairing lower RAM - which approach?
Replies: 6
Views: 669

Re: Repairing lower RAM - which approach?

Option 4 works fine in my Spectrum.
Option 3 /OE will be the same as the /OE for a one bit solution.
Kind regards Paul
by Paul
Fri Sep 06, 2019 3:39 pm
Forum: Hardware
Topic: ZX80 trouble shooting
Replies: 37
Views: 1708

Re: ZX80 trouble shooting

Hi Moggy, did you burn the 4k ROM twice into the 8k Eprom? I guess it needs to be there from 0-4k and from 4-8k
Kind regards Paul
by Paul
Tue Sep 03, 2019 4:27 pm
Forum: Emulators
Topic: sz81 emulator
Replies: 23
Views: 1954

Re: sz81 emulator

ZesarUX supports zxpand as well.
Kind regards Paul
by Paul
Mon Sep 02, 2019 8:22 pm
Forum: Hardware
Topic: A homemade ZX81 keyboard of wood
Replies: 13
Views: 682

Re: A homemade ZX81 keyboard of wood

They will be available I guess next year in April. Made by the German ZX-TEAM.
by Paul
Mon Sep 02, 2019 6:27 pm
Forum: Hardware
Topic: A homemade ZX81 keyboard of wood
Replies: 13
Views: 682

Re: A homemade ZX81 keyboard of wood

Enigmachine wrote:
Mon Sep 02, 2019 3:58 pm
TI99/4A's are more common than Zeddies so why not sacrifice one to do this. O :)
Because nothing compares to a real Cherry Keyboard with ZX81 professional printed keycaps.
:mrgreen: