4 ms·

There was at least one non-identical ISA slot: https://www.lo-tech.co.uk/wiki/IBM_Personal_Computer_XT_System_Board_Slot_8 https://www.lo-tech.co.uk/wiki/IBM_P

There was at least one non-identical ISA slot: https://www.lo-tech.co.uk/wiki/IBM_Personal_Computer_XT_System_Board_Slot_8 https://www.lo-tech.co.uk/wiki/IBM_Personal_Computer_XT_Syst... https://www.lo-tech.co.uk/understanding-pcxt-slot-8/ https://www.lo-tech.co.uk/understanding-pcxt-slot-8/

cestith 5mo ago
I used to have a couple of IBM EduQuest machines. The majority of the ISA slots were wrong-handed.
M95D 5mo ago
IBM was always special. :-) Aren't they the ones who invented the MCA bus abomination that required a floppy disk to configure each card?
- trollbridge 5mo ago
  You may want to read up on the history of dip switches, jumpers, and plug and play a little bit more.