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comp.sys.ibm.ps2.hardware

Discussing IBM PS/2 hardware

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Message 42,271 of 42,985

Tomas Slavotinek to Christian Holzapfel

Re: PC 730/750 "secret" 33 MHz base cloc

29 Nov 23 22:17:48

   From: slavotinek@gmail.com   
      
   On 24.11.2023 10:03, Christian Holzapfel wrote:   
   > IBM states:   
   >   
   > J26/J27 = 2-3/2-3 => 50 MHz   
   > J26/J27 = 2-3/1-2 => 60 MHz   
   > J26/J27 = 1-2/1-2 => 66 MHz   
   >   
   > By setting the fourth option   
   >   
   > J26/J27 = 1-2/2-3   
   >   
   > the system runs at a 33 MHz CPU base clock.   
   > Darn, was hoping for 75...   
      
   Thanks! Table updated:   
   https://ardent-tool.com/PC750/#Jumpers   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)

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