New project: Repro Camputers Lynx

[PhilC]

@stephen_usher what key switches does it use?

[stephen_usher]

@stephen_usher what key switches does it use?

The keyboard PCB has Cherry MX compatible pinouts.

[rubber_jonnie]

@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

[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 (632.34 KiB) Viewed 892 times

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.

[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.

[HigashiJun]

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...

[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.

[rubber_jonnie]

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

[PhilC]

So will you get it up and running today then @stephen_usher?

[stephen_usher]

So will you get it up and running today then @stephen_usher?

No idea at this point. It partly depends upon FedEx really.