Issue Tx boards discussions

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RalfR
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Re: Issue Tx boards discussions

Postby RalfR » Sun Aug 16, 2020 12:00 pm

I am really impressed!


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Pr0f
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Re: Issue Tx boards discussions

Postby Pr0f » Sun Aug 16, 2020 12:28 pm

tetroid wrote:
Pr0f wrote:Are there any additional signals around the ROM socket - as I've spotted 3 rows of pads, but only 2 are required for the original ROM socket? ;-)


Two rows have parallel connection, because of different connectors have 2.54 or 5.08 mm between rows.
Modern connectors - 5.08mm, but old QL connector - 2.54.


Good planning :-) Thank you for the explanation


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Re: Issue Tx boards discussions

Postby tetroid » Sun Aug 16, 2020 12:56 pm

Tesla wrote:Tetroid, It is wonderful.
New motherboard + new keyboard, will we see the new ql soon? :D


Unfortunately, we need only mass production ( big batch ) for QL case to have the resonable price. Case - last big problem.


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Dave
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Re: Issue Tx boards discussions

Postby Dave » Sun Aug 16, 2020 8:20 pm

tetroid wrote:Two rows have parallel connection, because of different connectors have 2.54 or 5.08 mm between rows.
Modern connectors - 5.08mm, but old QL connector - 2.54.


This was exactly my experience too. I had to put a second row of contacts in for the same reason.

How come the DRAM didn't change from 64Kx1 (x16)?


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Re: Issue Tx boards discussions

Postby tetroid » Sun Aug 16, 2020 8:30 pm

Dave wrote:
tetroid wrote:Two rows have parallel connection, because of different connectors have 2.54 or 5.08 mm between rows.
Modern connectors - 5.08mm, but old QL connector - 2.54.


This was exactly my experience too. I had to put a second row of contacts in for the same reason.

How come the DRAM didn't change from 64Kx1 (x16)?


I have many Samsung KM4164 and no 4464.
Because of this I didn' change this part. :)


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dex
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Re: Issue Tx boards discussions

Postby dex » Tue Aug 18, 2020 12:04 pm

Unfortunately, we need only mass production ( big batch ) for QL case to have the resonable price.

Can be the ZX Spectrum Next case used for QL/Q68 board?
That is mass produced, and we can try some negotiation about suprlus production for QL use.


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Cristian
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Re: Issue Tx boards discussions

Postby Cristian » Tue Aug 18, 2020 12:55 pm

What about utilizing an existing (thick) keyboard? Would it be adaptable as a case?

Image
Image


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Peter
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Re: Issue Tx boards discussions

Postby Peter » Tue Aug 18, 2020 9:09 pm

dex wrote:Can be the ZX Spectrum Next case used for QL/Q68 board?
That is mass produced, and we can try some negotiation about suprlus production for QL use.

Not ideal as it lacks the function keys.


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Re: Issue Tx boards discussions

Postby tofro » Tue Aug 18, 2020 9:31 pm

Peter wrote:
dex wrote:Can be the ZX Spectrum Next case used for QL/Q68 board?
That is mass produced, and we can try some negotiation about suprlus production for QL use.

Not ideal as it lacks the function keys.


Beyond that: quite a bit of "getting-used-to" involved if you don't have a ZX Spectrum background.

My muscle memory got quite a bit confused when I first tried the Next.


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