Pacific Northwest Intel Inboard 386/PC + Accessories, Cyrix cx486drx2 25/50, IBM 5161 Expansion Unit

[mtrahms]

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Hi all, removing some upgrades from my IBM 5150 to revert it to a configuration closer to stock. All of these components were working before I pulled them from the machine unless otherwise listed.

Intel Inboard 386/PC ($1200): comes with 5.25" driver disk, manual, 1MB memory expansion (not working, at least one of the ram chips are bad), and Harrison's 4MB memory expansion replica with SIMMs. 387 FPU is also installed on board.


IBM 5161 Expansion Unit ($1000): Chassis and cards appear to be original, backplane appears to be an accurate replica and cable is likely the one available from Mouser. Chassis is a little beat up with no rust and PSU is noisy and unserviced but works (standard XT form factor PSU). No drives in the 5.25 drive bay slots






Cyrix cx486drx2 25/50 ($200): Clock doubled 386 to 486 upgrade, verified to work on Intel Inboard with 16 MHz external (32 MHz internal) clock. Heatsink appears to be firmly attached but correctly oriented.



Am happy to discuss bundling if someone else wants to experience something close to the maximum performance of the original IBM PC/PC XT architecture.

 

[saifbadri]

Hi all, removing some upgrades from my IBM 5150 to revert it to a configuration closer to stock. All of these components were working before I pulled them from the machine unless otherwise listed.

Intel Inboard 386/PC ($1200): comes with 5.25" driver disk, manual, 1MB memory expansion (not working, at least one of the ram chips are bad), and Harrison's 4MB memory expansion replica with SIMMs. 387 FPU is also installed on board.
View attachment 1277389

IBM 5161 Expansion Unit ($1000): Chassis and cards appear to be original, backplane appears to be an accurate replica and cable is likely the one available from Mouser. Chassis is a little beat up with no rust and PSU is noisy and unserviced but works (standard XT form factor PSU). No drives in the 5.25 drive bay slots
View attachment 1277390
View attachment 1277391
View attachment 1277392
View attachment 1277394
View attachment 1277396

Cyrix cx486drx2 25/50 ($200): Clock doubled 386 to 486 upgrade, verified to work on Intel Inboard with 16 MHz external (32 MHz internal) clock. Heatsink appears to be firmly attached but correctly oriented.
View attachment 1277397
View attachment 1277399

Am happy to discuss bundling if someone else wants to experience something close to the maximum performance of the original IBM PC/PC XT architecture.

Hi, I assume this is sold correct?

 

[mtrahms]

Hi, I assume this is sold correct?

Not at all! Sorry if there's a mistake in my listing, this is my first time using the marketplace. All items are still available if you're interested.

 

[saifbadri]

Thanks, how much for the 4mb expansion only? Is it in working condition?

 

[mtrahms]

Thanks, how much for the 4mb expansion only? Is it in working condition?

I'm not interested in selling just the 4MB expansion on it's own at this time. It was working without issues when I pulled it off of the Inboard though.

 

[saifbadri]

Thanks, I have an inboard. Good luck with the sale. Nice complete collection

 

[saifbadri]

Hi, you mentioned
"1MB memory expansion (not working, at least one of the ram chips are bad"
How much for the above board only?

 

[mtrahms]

Hi, you mentioned
"1MB memory expansion (not working, at least one of the ram chips are bad"
How much for the above board only?

It's not an above board, it's one of the ram expansion modules that clips onto the inboard itself. I'm also planning on keeping that bundled with the inboard.

 

[saifbadri]

Ok thanks, let me know if you decided to let it go separately