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Re: My OSI 610 build - Expansion for the OSI 600
Posted: 01 Jul 2025 23:42
by HigashiJun
:girldance: :dualthumbup: :girldance:
Re: My OSI 610 build - Expansion for the OSI 600
Posted: 09 Jul 2025 15:02
by rubber_jonnie
This just arrived:
- IMG20250709133146.jpg (191.98 KiB) Viewed 1243 times
Double sided 80 track Tandon, seems to work OK with my BBC B.
Will try it with the OSI later.
Re: My OSI 610 build - Expansion for the OSI 600
Posted: 09 Jul 2025 15:25
by stephen_usher
:dualthumbup:
Re: My OSI 610 build - Expansion for the OSI 600
Posted: 09 Jul 2025 15:41
by rubber_jonnie
Seems to be working just fine with my BBC B too :)
Re: My OSI 610 build - Expansion for the OSI 600
Posted: 10 Jul 2025 11:10
by rubber_jonnie
And it's working with the OSI too :)
- IMG20250710092625.jpg (330.49 KiB) Viewed 1228 times
And here booting from a disk copied from Gotek to real FDD :)
- IMG20250710095149.jpg (269.88 KiB) Viewed 1228 times
The drive has a head lift solenoid too, something I've never had in a 5.25" drive before, and since the OSI is expecting an 8" drive, it continually spins the disk, so lifting the heads and dropping only when needed is a definite bonus.
Re: My OSI 610 build - Expansion for the OSI 600
Posted: 10 Jul 2025 11:34
by stephen_usher
:yay: :dualthumbup: :girldance:
Re: My OSI 610 build - Expansion for the OSI 600
Posted: 10 Jul 2025 11:41
by rubber_jonnie
stephen_usher wrote: 10 Jul 2025 11:34
:yay: :dualthumbup: :girldance:
I'm jamming like it's 1979 :)
Re: My OSI 610 build - Expansion for the OSI 600
Posted: 10 Jul 2025 11:46
by HigashiJun
:lol:
Re: My OSI 610 build - Expansion for the OSI 600
Posted: 15 Jul 2025 15:27
by rubber_jonnie
Well the last couple of days have been a bit of a pain.
My C1P-MF (OSI 600+610 Board) started to do this intermittently:
- IMG20250513153351.jpg (371.97 KiB) Viewed 1185 times
And slowly got worse until after a while that was all it would do. I spent a lot of time testing all the logic IC's and finding all were fine, pulling all the RAM bar the 2 video and 2 lower RAM ICs, then swapping them with each other to verify the RAM was good.
It didn't leave many options, but the CPU was showing signs of life at boot, but it wouldn't start. Surely the monitor ROM was fine? Nope it wasn't, as soon as I dropped in a replacement, it started running again, and after finally putting all the RAM back in, I got this:
- IMG20250715150950.jpg (200.67 KiB) Viewed 1185 times
Now breathing a sigh of relief that it was something simple. I can reassemble it with the 610 board now and fingers crossed it'll be just fine.
Re: My OSI 610 build - Expansion for the OSI 600
Posted: 15 Jul 2025 16:47
by rubber_jonnie
And just to annoy me even further, the FDD interface no longer works, even though the RAM upgrade does...