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Re: A poorly Zeddy

Posted: Tue Sep 26, 2017 4:39 pm
by 1024MAK
A new control system for a pizza oven so that you can have hot pizza when you get home?

Mark

Re: A poorly Zeddy

Posted: Tue Sep 26, 2017 4:41 pm
by 1024MAK
:arrow: Ahh, got it! :D

It's part of a module to help with the repair of this :mrgreen:

Mark

Re: A poorly Zeddy

Posted: Tue Sep 26, 2017 5:23 pm
by Moggy
No it's the kludge fix for his UDG board which could only manage to display 127.9342876 out of 128 UDG's. :lol:
(apologies to the Pentium floating point unit design team)

Re: A poorly Zeddy

Posted: Tue Sep 26, 2017 5:51 pm
by PokeMon
Maybe a Trump card ? :mrgreen:

Re: A poorly Zeddy

Posted: Tue Sep 26, 2017 6:51 pm
by Andy Rea
LOL i've had a good laugh at some of those suggestions,,, @mark "ah, so you're a waffle man."

@siggi i had a thought that maybe an arduino or perhaps something a little faster pic32 maybe could sit and watch the addrress and data lines purely passively and then output the result on an coloured lcd...

regards Andy

Re: A poorly Zeddy

Posted: Tue Sep 26, 2017 11:37 pm
by gammaray
This thread seems like two threads in one given the two different images. An unpopulated board and another one called the "Sincluster ZX81ish" but...

I'Il pick this one
IMG_4048.jpg
(4.92 MiB) Downloaded 467 times

At the risk of sounding stupid (again) this one runs a ROM image from an SDCARD! But only with the approval of the thumbscanning coder in the upper left allows it to boot.

The first ZXPAND?

Re: A poorly Zeddy

Posted: Wed Sep 27, 2017 6:57 am
by mrtinb
Andy Rea wrote: Mon Sep 25, 2017 10:33 pm not much progress but it hasn't been forgotten...
Image

can you tell what it is yet ?
To me it seems the bottom pcb is missing alle the capacitors, diodes etc. Strange?

Re: A poorly Zeddy

Posted: Wed Sep 27, 2017 12:27 pm
by Moggy
gammaray wrote: Tue Sep 26, 2017 11:37 pm This thread seems like two threads in one given the two different images. An unpopulated board and another one called the "Sincluster ZX81ish" but...

I'Il pick this one

IMG_4048.jpg

At the risk of sounding stupid (again) this one runs a ROM image from an SDCARD! But only with the approval of the thumbscanning coder in the upper left allows it to boot.

The first ZXPAND?
No the first Xpand was a piece of Vero board stuffed into a Sinclair ram pack casing about a decade ago shame that the pictures are lost though.

Some interesting reading on this,now defunct, Zx81/TS1000 forum that was ran by New Yorker Bill H..

http://forum.tlienhard.com/TS1000/www.t ... 902112.htm


Moggy(Tabbycat)

Re: A poorly Zeddy

Posted: Wed Sep 27, 2017 11:42 pm
by Andy Rea
ah i miss the old ts1000 site, was a good one...

@martin, most of the passives have been mounted on the back side of teh board, see the images in the earlier posts

Andy

Re: A poorly Zeddy

Posted: Thu Sep 28, 2017 1:10 am
by gammaray
I have given it some thought and it is an internal UDG and ram upgrade probably 32K with 8k in the 8-16k range.

Where is my cookie?

^No NO NO! It's his under-the-hood ULA replacement!