From: slavotinek@gmail.com   
      
   On 19.04.2023 20:47, schimmi wrote:   
   > Hm, I thought, the Local Bus on a PS/2 _is_ MCA, like VLB or PCI on other   
   machines. Do I miss something here? :)   
      
   Well, local bus is a rather ambiguous term. Generally it has two   
   (sometimes overlapping) meanings:   
      
   -a bus that is a direct or almost direct extension of the CPU bus (no   
   bridges, only buffers... if that)   
   -a high-performance bus that overcomes the bandwidth limitations of the   
   legacy bus (this meaning is somewhat relative as "legacy" may mean ISA   
   or even MCA or EISA)   
      
   Some period-correct publications called MCA "a local bus" but this was   
   mainly to highlight its higher performance (granted, the early MCA   
   implementations where somewhat closer to the CPU bus...).   
      
   Even PCI is sometimes called a local bus (the term is used even in the   
   PCI standard itself), yet it clearly is not local to the CPU, it's   
   always bridged.   
      
   To remove this ambiguity we use the "local bus" term only for components   
   that are attached directly to the CPU bus (possibly through some   
   buffers) - like the S3 video on Lacuna, the SCSI subsystem on the 56/57   
     planars, the GXT150L GPU in the RS/6000 7006, etc.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)