Reply 40 of 42, by Mithloraite
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> still wondering if the poster of the board with a PS/2 DIN has a working PS/2 mouse on this motherboard.
Hello!
Sorry I had no access to Vogons notification mailbox for some time.
This Chaintech SPM board (indeed) ended up in my possession but it was not my project.
The PS/2 mouse connector was soldered on by a talented experimenter but it never worked. He had an idea the PS/2 mouse operation has something to do with the keboard controller chip AND bios. Since the "proper" controller chip does remain unknown and the existing bios is dubious about PS/2 operation the expriment was halted.
Frankly I have never regretted that too much because I have lots of mice with wheel control (almost like any old PS/2 but standard COM!) and these are quite capable of handling Doom or Quake. Like it really was in the 90s.
Some A4 Tech wheel mice even have a nice 'silver' coating reminding of early ATX case style. When they stopped being all office-grey-white...
IIRC the keyboard controller chip on this mb is socketed. If you might have an idea what it should be to drive PS/2 mice I could look for that. BIOS clues could also change something I suppose.
I have another 486 glory idea, also 😀 Your fastest 486 Ultimate test with PC Player using the rare Cyrix 133Mhz does show around 12 fps. But I have seen (with my own eyes) a 12.6 fps score is possible even without Cyrix 133, just with the common AMD-160Mhz.
(overmarked and/or overclocked X5-133 which are many.)
Since I can see Cyrix-133 is more powerful than 160Mhz AMD (judging by other bench scores) I suppose it could breat the 13 fps limit or even reach 14 fps with the EXP8449 board that I used.
14 fps would be the true ultimate PCP bench score.
If it is ready to support Cyrix 133Mhz, that is.
P.S.
Getting a proper Cyrix for myself and checking this is not too cheap these days. Some people are too crazy driving up the vintage prices asking hundreds of dollars for real vintage - and around a hundred for total crap... 😀 This would not be a healthy plan. 😀
Perfection is the key. Fatality is the key. (c)