From: ldo@nz.invalid   
      
   On 25 Feb 2025 02:19:13 -0400, Mike Spencer wrote:   
      
   > Learned all the basic principles of how computers operate --   
   > intentionally obstructed from day 1 by Apple for Mac, dismally more   
   > arcane for then-current 386.   
      
   The “Inside Macintosh” series had all the details. Volumes I and II   
   covered the software APIs, while Volume III described the original   
   Macintosh hardware: the video buffers, sound buffers, vertical refresh   
   interrupt, floppy interface, Z8530 serial controller chips, the lot.   
   Volume IV updated all that for the Mac Plus (with SCSI!).   
      
   Those Z8530 chips were wonderfully versatile. Back when your Microsoft-   
   compatible PCs were struggling to do transfers beyond about 19200bps, the   
   Mac could do 230.4kbps, or even a megabit per second with external   
   clocking (e.g. for MIDI).   
      
   --- SoupGate-DOS v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)