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documentation:hardware:m2:devcard_revh

Mod performed on MAC revH to convert to PC revH

  1. removed U2104. (bridget bus management)
  2. bypassed /BR /BG signals (removed bridget bus management) : R2122, R2124 (BG master, BG slave) connected directly to CPUs (via logic probes). R2125 (BR master) and R2123(BR slave) are bypassed with 0 ohm jumper.
  3. removed 29.5 MHz oscillator on position U5403
  4. populated and shorted J5401
  5. added 2 bodge wires on the back PCMCIA
  6. added PCMCIA to EPP bridge card.
documentation/hardware/m2/devcard_revh.txt · Last modified: 2022/11/02 14:27 by fixelsan