Comments on: 32bits of disappointment, upgrading the IBM PS/2 model 60 https://virtuallyfun.com/2023/10/27/32bits-of-disappointment-upgrading-the-ibm-ps-2-model-60/ Fun with Virtualization Thu, 04 Jan 2024 00:11:23 +0000 hourly 1 https://wordpress.org/?v=7.0.4 By: Randy Lea https://virtuallyfun.com/2023/10/27/32bits-of-disappointment-upgrading-the-ibm-ps-2-model-60/comment-page-1/#comment-348210 Thu, 04 Jan 2024 00:11:23 +0000 https://virtuallyfun.com/?p=13416#comment-348210 I’m interested in the graphics card in your PS/2. Does it have the Inmos Color Palette chip, or Music Semiconductor? I was very involved with the chips from both vendors. One big difference, if you updated the palette RAM at random times on the Inmos chip, there were snowflakes on the display, while the Music chip didn’t. This is documented in the VGA manual, because IBM went with Inmos for the original design. The Music chip came out later.

]]> By: neozeed https://virtuallyfun.com/2023/10/27/32bits-of-disappointment-upgrading-the-ibm-ps-2-model-60/comment-page-1/#comment-343436 Thu, 16 Nov 2023 08:08:43 +0000 https://virtuallyfun.com/?p=13416#comment-343436 In reply to Chris M..

Yeah it’s pretty much what I had figured. I wasn’t sure if I should get the i960 super ultra cachelord card as I figure it’ll suffer the exact same issue.

It’s nice to have disks that basically break optimization strategies

]]> By: Chris M. https://virtuallyfun.com/2023/10/27/32bits-of-disappointment-upgrading-the-ibm-ps-2-model-60/comment-page-1/#comment-343401 Wed, 15 Nov 2023 23:58:20 +0000 https://virtuallyfun.com/?p=13416#comment-343401 I’m not surprised that the caching card has no performance benefit with a flash memory solution. The overhead of the caching controller is likely the cause of the slowdown you see. Most of the speed advantage is gone when you have a drive with practically zero seek time and transfers data well above what period hard drives did (the flash memory is faster than the RAM in the machine!).

]]>