IBM ps/2 model 30 286 memory configuration \ VOGONS

IBM ps/2 model 30 286 memory configuration

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First post, by my03

Posted on 2020-03-12, 19:42

my03 Offline

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Hi Vogons,

i got hold of (again) my very first PC recently (last time was in 91 i think) in stellar condition (besides the Dallas RTC, but i will piggyback that with a coin-cell according to the guides available). My machine comes with the 1024Kb ram and i recently got hold of a couple of 1Mb sticks (just like what nztdm described here: Success! Convert regular SIMMs into IBM PS/2 proprietary SIMMs) to modify.

But what would a potentially good configuration look like? Does all four slots need to be filled with the exact same amount of memory per stick (i.e 4 1Mb sticks) or does it work with two 256 and two 1Mb`?

Reply 1 of 2, by pentiumspeed

Posted on 2020-03-12, 20:41

pentiumspeed Offline

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In pairs for 286 using 30 pin SIMMs. Detection resistors on SIMMs had to be added or changed to meet requirement of PS/2.

Cheers,

Great Northern aka Canada.

Reply 2 of 2, by my03

Posted on 2020-03-12, 20:53

my03 Offline

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Rank: Member
Posts: 182
Joined: 2019-11-20, 19:50
Location: Sweden

pentiumspeed wrote on 2020-03-12, 20:41:

In pairs for 286 using 30 pin SIMMs. Detection resistors on SIMMs had to be added or changed to meet requirement of PS/2.

Cheers,

thx pentiumspeed for the reply 😀

So two 1MB + two 256Kb (2.5MB total) would actually be a valid configuration for this machine? That sounds great 😀

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