🚀 go-pugleaf

Nick,

Nick Cole wrote in message <6ntjvf$mtg$2@pegasus.csx.cam.ac.uk>...
>IBM PS/2 & Microchannel bits & bobs
>
>* IBM PS/2 Model 30/286 System unit, 1MB RAM, 21MB HD and VGA onboard
>  ***NOTE*** These simms will fit in the IBM SCSI adapter to give 1MB
>  cache!


You might want to check this statement again.  It's true that the simms from the 30/286 will fit the SCSI adapter with cache, but it's a bit more complex than that:

- There are 2 simm slots on the scsi adapter.  Two 256K simms gives you 512K cache.  Two 1 MB simms gives you 2 MB cache.  These are the only options.

- There are 4 simm slots on the 30/286 motherboard.  You can use 2 or 4 256K simms to get 512K or 1 MB total memory.  You can use 2 or 4  1 MB simms to get 2 MB or 4 MB memory.  Memory must be all of the same size and must be installed in pairs.

- The only way to get 1 MB memory in a 30/286 is with 4 256K simms.  Since no more than 2 of these can be used on the scsi cache, you can only get 512K cache using the simms in your machine.

- In other words, you've described an impossibility!  ;-)

Carroll




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