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Re: OSI 600D Superboard Build
Posted: 13 Jan 2024 19:42
by rubber_jonnie
Re: OSI 600D Superboard Build
Posted: 13 Jan 2024 20:54
by HigashiJun
:lol:
Re: OSI 600D Superboard Build
Posted: 14 Jan 2024 16:34
by rubber_jonnie
I got round to running the initial tests, and also confirmed there are no shorts on the 5v rail, so feeling confident I added the ICs I have to the board, and also the keycaps, since I only have 5 resistors left to install, and that's all the soldering done:
PXL_20240114_162252309.jpg
Looking pretty good, though not enough to power on and get any activity. I'm pleased with the outcome thus far, and given that the keycaps were a bit on the expensive side, very pleased with how that's turned out.
I also spent some time working out what ICs I need to order, and have managed to identify the items not on the BoM, but contained in the instructions. I also managed to populate a few more sockets I'd missed when going through the initial trawl of my stock of ICs.
Fingers crossed I will be somewhere close to running this beast by the end of January.
Re: OSI 600D Superboard Build
Posted: 14 Jan 2024 16:52
by stephen_usher
Nearly there!
Re: OSI 600D Superboard Build
Posted: 14 Jan 2024 17:05
by rubber_jonnie
Re: OSI 600D Superboard Build
Posted: 14 Jan 2024 19:06
by rubber_jonnie
Well, that's the last of the ICs ordered, it's just a waiting game now.
It's been a relatively expensive project, probably about £120 in components (Including what I've just ordered), another £40 for the PCB.
In total, including the key caps, I'd suggest it's about £300 to build, so a little more today than the £219+VAT @15% in 1979 for the UK-101, the equivalent machine over here.
However, the £250 ish total price back then is worth nearly £1600 in today's money. Luckily I've been able to spread the cost over a few months, so it hasn't been all or nothing.
It's a fun project if you like this sort of thing.
Re: OSI 600D Superboard Build
Posted: 14 Jan 2024 20:56
by stephen_usher
Keeps you out of mischief. ;-)
Re: OSI 600D Superboard Build
Posted: 14 Jan 2024 22:53
by rubber_jonnie
stephen_usher wrote: 14 Jan 2024 20:56
Keeps you out of mischief. ;-)
It certainly does 😁
Re: OSI 600D Superboard Build
Posted: 15 Jan 2024 04:43
by HigashiJun
The end soon ?
Re: OSI 600D Superboard Build
Posted: 15 Jan 2024 09:03
by rubber_jonnie
HigashiJun wrote: 15 Jan 2024 04:43
The end soon ?
Depends when my parts arrive. I think I will have enough for initial configuration of the video circuit and a full power on test this week, but I won't have all the RAM for a couple of weeks I think, though hopefully enough for a basic test.