So, the boards then....
Firstly and to save you reading on if you're broke, the PCB's are going to be £10
delivered. I paid just short of £8 for them and they were dearer than say BeebSID because they're bigger and, more significantly, the EUP boards have the gold-plated edge connector. (I went for gold plating in the end because after canvassing opinions on here, I would never have heard the end of it if anyone subsequently suffered tarnishing
.) On top of the £8 I'm going to buy some new padded envelopes because re-cycling old ones is painful and then there'll be the postage.
Basically then, if you fancy one, PM me with an email address, I'll reply via email and we can exchange details from there. PayPal is my preferred payment method but please note that I'll ask you to 'gift' the money to avoid PP fees. There's no profit in the tenner and I certainly don't want to lose a chunk to PayPal
(If you’re not familiar with PP gifting I’ll explain via email.)
What do you get for your tenner? A bare PCB.
What does it do once assembled? The completed board plugs into one of the slots in a Plus 1 or Rombox/Rombox+ and…
Adds a 6522 VIA giving the Elk two eight-bit User Ports, each having the identical interface specification to the Beeb & Master User Port. The 6522 clock support circuitry is enhanced to ensure that the VIA timing is immune to Elk clock-stretching thus ensuring maximum compatibility with Beeb/Master peripherals.
Incorporates an UPURS interface so that you can take advantage of this famous integrated disc & rom image transfer suite and the ground-breaking UPCFS ‘direct-play’ system
Adds a single rom socket which allows the use of 8, 16 and 32K rom & ram chips. If a 32K rom or ram chip is used (e.g. 27256 or 62256), the socket will respond as two 16K devices – Elk OS rom id’s 0/1 or 2/3 depending on Plus 1 slot in use.
(On-board battery backup support for ram chips is included but initial testing has shown that the ram contents tend to corrupt at power cycle and hence I suggest that these components are left off for the time being.)
A pile of boards ready for the off with the epoxy shim already added.
An assembled board is shown below. The empty socket at IC8 is a development spare and can be left off as can the battery holder and battery support components, R4, D3 and D4. A wire link should be fitted in place of D3.
As a point of interest regarding the connectors, the type I used
for the UPURS port is shown below. This type takes advantage of solder strain-relief which I have provisioned for on the PCB and thus avoids the need for nuts & bolts. The 20-way User Port connectors don’t normally require strain relief but fixing holes are present on the PCB for these if you feel you are very heavy-handed
Sorry, but I can't offer assembled boards - I'm hoping there can be some forum love where those who can will come to the aid of those who can't