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New project: Repro Camputers Lynx

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PhilC
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Re: New project: Repro Camputers Lynx

Post by PhilC »

@stephen_usher what key switches does it use?
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stephen_usher
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Re: New project: Repro Camputers Lynx

Post by stephen_usher »

PhilC wrote: 29 Mar 2026 12:04 @stephen_usher what key switches does it use?
The keyboard PCB has Cherry MX compatible pinouts.
Intro retro computers since before they were retro...
ZX81->Spectrum->Memotech MTX->Sinclair QL->520STM->BBC Micro->TT030->PCs & Sun Workstations.
Added code to the MiNT kernel (still there the last time I checked) + put together MiNTOS.
Collection now with added Macs, Amigas, Suns and Acorns.
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rubber_jonnie
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Re: New project: Repro Camputers Lynx

Post by rubber_jonnie »

stephen_usher wrote: 29 Mar 2026 12:30
PhilC wrote: 29 Mar 2026 12:04 @stephen_usher what key switches does it use?
The keyboard PCB has Cherry MX compatible pinouts.
Nice, I used Cherry MX on the OSI 600D and the Cosmac Elf II uses them too, it's a great key switch :)
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
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stephen_usher
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Re: New project: Repro Camputers Lynx

Post by stephen_usher »

Yeah, well, I'm going to be using Chinese knock-off ones as they're massively cheaper and I don't think the machine will get a huge amount of use. :-)

Binary Dinosaurs did a high-resolution picture of his Lynx 128K so I could get the details of which parts are not installed on the original and where the factory bodge between IC61 and IC47 goes.


Original-PCB.jpg


It also shows that there are a number of chips which should be non-LS variants. Some are straight TTL parts others are the S variant. We'll see if the timings are important, especially for the 74S74 flip-flops.
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Intro retro computers since before they were retro...
ZX81->Spectrum->Memotech MTX->Sinclair QL->520STM->BBC Micro->TT030->PCs & Sun Workstations.
Added code to the MiNT kernel (still there the last time I checked) + put together MiNTOS.
Collection now with added Macs, Amigas, Suns and Acorns.
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stephen_usher
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Re: New project: Repro Camputers Lynx

Post by stephen_usher »

Well, the DIN sockets have arrived, as has the TEA1002. Nothing else has though.

The Mouser order was supposed to arrive today "8AM -12PM"... which FedEx have just changed to "By the end of the day". Given that Mouser (and hence I) paid for "before 12PM" delivery and because of that I've not been out grocery shopping and hence have no lunch I'm not happy. If they'd have been up front and said later in the day then I could have planned my day around it.

The CRTC is still somewhere within the Royal Mail system, apparently...

Cricklewood Electronics still haven't shipped the chips with the order status unchanged at "Processed" since last week. So I've given up on them and bought them from Farnell instead, along with the rest of the connectors so as to bulk out the order. At least they should arrive tomorrow.

So, on the whole, frustrating.
Intro retro computers since before they were retro...
ZX81->Spectrum->Memotech MTX->Sinclair QL->520STM->BBC Micro->TT030->PCs & Sun Workstations.
Added code to the MiNT kernel (still there the last time I checked) + put together MiNTOS.
Collection now with added Macs, Amigas, Suns and Acorns.
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HigashiJun
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Re: New project: Repro Camputers Lynx

Post by HigashiJun »

stephen_usher wrote: 01 Apr 2026 12:11 The Mouser order was supposed to arrive today "8AM -12PM"... which FedEx have just changed to "By the end of the day".
Same story here every time...
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stephen_usher
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Re: New project: Repro Camputers Lynx

Post by stephen_usher »

At least the post has arrived.... Which contained all the eBay stuff (CRTC & extra LS161s) and the two Cricklewood Electronics chips.

Still no sign of the Mouser delivery though.
Intro retro computers since before they were retro...
ZX81->Spectrum->Memotech MTX->Sinclair QL->520STM->BBC Micro->TT030->PCs & Sun Workstations.
Added code to the MiNT kernel (still there the last time I checked) + put together MiNTOS.
Collection now with added Macs, Amigas, Suns and Acorns.
Top
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rubber_jonnie
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Re: New project: Repro Camputers Lynx

Post by rubber_jonnie »

stephen_usher wrote: 01 Apr 2026 12:34 At least the post has arrived.... Which contained all the eBay stuff (CRTC & extra LS161s) and the two Cricklewood Electronics chips.

Still no sign of the Mouser delivery though.
So I'm not the only person who uses Cricklewood then :)
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
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PhilC
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Re: New project: Repro Camputers Lynx

Post by PhilC »

So will you get it up and running today then @stephen_usher?
If it ain't broke, test it to Destruction.
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stephen_usher
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Re: New project: Repro Camputers Lynx

Post by stephen_usher »

PhilC wrote: 01 Apr 2026 13:12 So will you get it up and running today then @stephen_usher?
No idea at this point. It partly depends upon FedEx really.
Intro retro computers since before they were retro...
ZX81->Spectrum->Memotech MTX->Sinclair QL->520STM->BBC Micro->TT030->PCs & Sun Workstations.
Added code to the MiNT kernel (still there the last time I checked) + put together MiNTOS.
Collection now with added Macs, Amigas, Suns and Acorns.
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