Search found 945 matches

by XavSnap
Fri Aug 14, 2020 8:16 pm
Forum: Hardware
Topic: This weekends projects
Replies: 53
Views: 3846

Re: This weekends projects

"R" is the decimal notation in the BS1852 format.
https://reviseomatic.org/help/e-resisto ... 0Codes.php

R47 = 0R47 = 0.47 Ohm.

47R = 47R0 = 47 Ohm.

470R= 470R0 = 470 Ohm.
by XavSnap
Fri Aug 14, 2020 8:56 am
Forum: Hardware
Topic: This weekends projects
Replies: 53
Views: 3846

Re: This weekends projects

:o
c8.JPG
c8.JPG (18.67 KiB) Viewed 554 times
Something's wrong in this kind of circuits…
Like "Elletronica mister kit", this article seem to be a rough draft of the original project.

This purpose (article) is clearly sloppy and wrong to sell the greatest number of PCB…

Buy a PCB, and put a bunch of components…
That's all.
by XavSnap
Fri Aug 14, 2020 12:32 am
Forum: Hardware
Topic: This weekends projects
Replies: 53
Views: 3846

Re: This weekends projects

R7:
resistor.jpg
resistor.jpg (28.72 KiB) Viewed 782 times
YEL-VIO-BLK-BLK-BRN
470x1 qua:1

470 Ohms 1%
by XavSnap
Thu Aug 13, 2020 11:35 pm
Forum: Hardware
Topic: This weekends projects
Replies: 53
Views: 3846

Re: This weekends projects

Mageco (VTR) SPO256-al2 board:

Mageco.JPG
MANUEL-ZX81-SPO256[MAGECO]-5.jpg
From:
http://zx81.ordi5.free.fr/vtr/download/ ... ECO%5D.pdf
by XavSnap
Thu Aug 13, 2020 11:20 am
Forum: Hardware
Topic: This weekends projects
Replies: 53
Views: 3846

Re: This weekends projects

Something's wrong with R7=470R Surely 470k , due to a compression error from the native "Djvu" format document… :o This format used to get all black zones (characters, lines, drawing…) and put them on the page and get the similar character to use it in the document. The "Djvued" document, in a book,...
by XavSnap
Thu Aug 13, 2020 8:41 am
Forum: Welcome Area
Topic: Hello from Texas Again
Replies: 6
Views: 1029

Re: Hello from Texas Again

happy to read you again.
take care.

Being passionate about ZX81 is a very good therapy for feeling better !
by XavSnap
Thu Aug 13, 2020 8:33 am
Forum: Hardware
Topic: This weekends projects
Replies: 53
Views: 3846

Re: This weekends projects

Hi mcarlson_sb, Thanks for sharing. Are there more readable scans of this magazine? I can't read the pin number on the linked web page… :mrgreen: I plan to rebuild it on Kicad. [edit] http://www.computinghistory.org.uk/det/52940/Maplin-ZX81-Talk-Back-GB18U/ Link to Maplin magazines : https://worldra...
by XavSnap
Sun Aug 09, 2020 9:53 pm
Forum: Software
Topic: Is this a ZX81 recording or not?
Replies: 50
Views: 5173

Re: Is this a ZX81 recording or not?

Zip update:
"Tape verify", "Cauchemard House".
CompilWill.zip
(132.24 KiB) Downloaded 17 times
(minor changes on "Cauchemard-House")
by XavSnap
Sun Aug 09, 2020 9:09 pm
Forum: Software
Topic: Is this a ZX81 recording or not?
Replies: 50
Views: 5173

Re: Is this a ZX81 recording or not?

Thanks Paul. Still worth re-recording... Yes it was badly corrupt. About five mute or bit decay. The Basic program can be rebuilt using "ZxToken" P to TXT, but the main part of this game is in the Vars values. I ever type-ins the "little pocket book for the Zx81" and the adventure game "La maison du...
by XavSnap
Sun Aug 09, 2020 10:13 am
Forum: Software
Topic: Is this a ZX81 recording or not?
Replies: 50
Views: 5173

Re: Is this a ZX81 recording or not?

Cauchemard House update.
Cauchemard-house.zip
(29.21 KiB) Downloaded 21 times