I missed the hot cakes...

ZX80 / ZX81 hardware and software offered for sale or swapping
Bloodnok
Posts: 9
Joined: Wed Dec 02, 2015 11:57 pm
Location: New Zealand
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Re: I missed the hot cakes...

Post by Bloodnok » Fri Aug 16, 2019 1:15 am

Moggy wrote:
Thu Aug 15, 2019 12:24 pm
QUOTE.

"It looks like you sold about 6 of these since moggy pointed them out yesterday. :D Happy days."

I WANT 10% !!!!!!!!!! :lol:

Seriously, welcome aboard Bloodnok ( A Goons fan perhaps?) and really excellent work. :D
Thanks Moggy. Bloodnok is an old gaming tag which has sort of stuck - and yes it does originate from a fond appreciation of the Goons humour.

And I'll definitely look at 10% (of the profit :lol: )

Bloodnok
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Re: I missed the hot cakes...

Post by Bloodnok » Fri Aug 16, 2019 1:21 am

1024MAK wrote:
Thu Aug 15, 2019 9:00 pm
I prefer my internal RAM upgrade detailed here :D

Hello Bloodnok, welcome :D

I must admit, I could not resist buying one of your vLA81 Sinclair ZX81 ULA replacements.

When it arrives (and I can find some time) I’ll try hooking it up to the Zeddy that I used in the article on the site I linked to above. I’ll have to reroute one SRAM address line to the vLA81 pin 35 and wire up the remaining SRAM address line to the CPU A14 address line.

Mark
Hi Mark, definitely a neater approach. I've done much the same but didn't cut any tracks. Instead I made a modified socket which did the pin translation needed. Can remove the mod and restore the zeddy to original easily.

Your vLA81 has already shipped (along with the rest) so should reach you in 2-3 weeks (maybe sooner).

Bloodnok
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Re: I missed the hot cakes...

Post by Bloodnok » Fri Aug 16, 2019 3:13 am

mrtinb wrote:
Thu Aug 15, 2019 6:51 am
Hi and a warm welcome. Looks like a great product.

Since you, by magic, just create one ULA after the other, :) how about a ULA for the Lambda 8300? It’s a little different than the ZX81 and has the charset (ROM) build into the ULA. :)
Just when I thought I had run out of things to do :) Is there any good source of info on the Lambda? The ROM would probably mean a small FPGA is required but otherwise I'd be interested in taking up the challenge.

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Paul
Posts: 1024
Joined: Thu May 27, 2010 8:15 am
Location: Germanys west end

Re: I missed the hot cakes...

Post by Paul » Fri Aug 16, 2019 6:04 am

Bloodnok wrote:
Fri Aug 16, 2019 3:13 am

Just when I thought I had run out of things to do :)
As far as I know there is the Sinclair C5 ULA missing as well.
There is definitely a small market for this.
Kind regards Paul
In theory, there is no difference between theory and practice. But, in practice, there is.

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mrtinb
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Re: I missed the hot cakes...

Post by mrtinb » Fri Aug 16, 2019 1:33 pm

Bloodnok wrote:
Fri Aug 16, 2019 3:13 am
Just when I thought I had run out of things to do :) Is there any good source of info on the Lambda? The ROM would probably mean a small FPGA is required but otherwise I'd be interested in taking up the challenge.
Unfortunately the info on Lambda 8300 is quite sparse.

The best source I have found is NO$ZX emulator's documentation: https://problemkaputt.de/zxdocs.htm#lambda8300

Then there's the disassembled ROM source in Das PC-8300 ROM Buch.
Martin
ZX81, Lambda 8300, Commodore 64, Mac G4 Cube

Lardo Boffin
Posts: 1013
Joined: Sat Nov 26, 2016 2:42 am

Re: I missed the hot cakes...

Post by Lardo Boffin » Sat Aug 17, 2019 11:05 pm

The hot cakes are back! There is one less now though. :D
ZX80
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
Iss 3 ZXVid
TS 1000 iss 3, ZXPand AY, ZX8-CCB, ZX-KDLX & ChromaSCART
TS 1500
TS 2000
Spectrum 16k (iss 1 s/n 1499)
Various Spectrum 48ks plus a DIVMMC future and SPECTRA

nollkolltroll
Posts: 282
Joined: Sat Sep 27, 2014 8:02 pm
Location: Stockholm, Sweden

Re: I missed the hot cakes...

Post by nollkolltroll » Fri Aug 30, 2019 5:46 pm

My VLA81 arrived safely to Sweden today. I am VERY happy to report I did not get slammed with the usual customs and VAT. I was a bit worried about that since I thought it was delivered from Germany when I ordered...
Will try to get time to test it this weekend and report back.
/Adam

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