Search found 246 matches

by McKlaud
Tue Jan 09, 2018 12:56 am
Forum: Hardware
Topic: zx spectrum in zx81 case
Replies: 63
Views: 15551

Re: zx spectrum in zx81 case

Nope still the same log. The CPLD is warm. I've checked continuity from the 10 pin header to CPLD and all is good. Voltage to the board is good. To be honest I bought five (5) CPLD chips from a Far East supplier and only 2 are fine. Anyway, good luck with your board. @superfo designed an interface ...
by McKlaud
Sun Jan 07, 2018 1:36 am
Forum: Development
Topic: "Professional" Keyboard TI99 Packaging Project
Replies: 5
Views: 1498

Re: "Professional" Keyboard TI99 Packaging Project

IPA is goo. But be very careful with any printed labels. They will come off if the paint is alcohol based.
by McKlaud
Sat Jan 06, 2018 9:15 pm
Forum: Hardware
Topic: Yet another ROM adapter
Replies: 46
Views: 7449

Re: Yet another ROM adapter

My mini boards arrived and work well.

The prototype in flesh
Image

Image

moordean, thanks for the idea :)
by McKlaud
Thu Jan 04, 2018 10:22 am
Forum: Hardware
Topic: TS1000's (ZX81's) black screen
Replies: 12
Views: 2565

Re: TS1000's (ZX81's) black screen

:mrgreen: well, well, well ... :mrgreen: I think a few other guys on here would be interested in a broken TS1000 :twisted:

Before you start cannibalising the board check if the TR1 is fine.

What version of the ULA is there?
by McKlaud
Wed Jan 03, 2018 10:02 pm
Forum: Hardware
Topic: zx spectrum in zx81 case
Replies: 63
Views: 15551

Re: zx spectrum in zx81 case

by McKlaud
Wed Jan 03, 2018 6:19 pm
Forum: WANTED
Topic: Wanted Timex Sinclair 1000 with rampack
Replies: 5
Views: 1746

Re: Wanted Timex Sinclair 1000 with rampack

Yeah, they are common in the States but prices are sky-high there. Plus unbelievable costs for shipment across the pond and probable import duties makes any TS1000/1500 overpriced and worth much more than ZX80 in good shape.
by McKlaud
Wed Jan 03, 2018 12:08 am
Forum: Hardware
Topic: zx spectrum in zx81 case
Replies: 63
Views: 15551

Re: zx spectrum in zx81 case

Let's start :) I assume that your PC is Windows 7 or earlier OS based and the Altera Quartus package has been already installed. So, first thing first and connect an Altera USB Blaster to any USB port on you PC. The blaster should be detected and drivers installed automatically. If Windows struggles...
by McKlaud
Tue Jan 02, 2018 2:09 pm
Forum: Hardware
Topic: zx spectrum in zx81 case
Replies: 63
Views: 15551

Re: zx spectrum in zx81 case

Hi Dave, You should also download and install the Max7000 library ( http://download.altera.com/akdlm/software/acdsinst/13.0sp1/232/ib_installers/max_web-13.0.1.232.qdz ). To make ZXmax48 working, you need just one file with .pof extension. This is the brain for this clone. Anyway when I am back home...
by McKlaud
Mon Jan 01, 2018 7:23 pm
Forum: Hardware
Topic: zx spectrum in zx81 case
Replies: 63
Views: 15551

Re: zx spectrum in zx81 case

I've forgotten to mention about another modification that is needed for the /IORQULA signal. This line is not available on the edge connector, so there is a newer version of the CPLD software that sorting this out. Also an additional 470R resistor is needed between pin 20 and 24 of the PLCC and a sh...
by McKlaud
Mon Jan 01, 2018 6:38 pm
Forum: Hardware
Topic: zx spectrum in zx81 case
Replies: 63
Views: 15551

Re: zx spectrum in zx81 case

Hi Guys, To program Altera Max7000 (EPM7128S) you need software called Altera Quartus II in version 13.0sp1. Any newer Quartus does not support these chips. Anyway, it would be also good if you use Windows 7, because this version does not work very well under Win10 (especially 64-bits one). You can ...