HWLatchPA (PCMCIA_A)
 Bit 0   Io_power     1=on
     1   Serial_power 1=on
     2   Hdd_power    1=on
     3   Hdd_rst      1=released  0=held reset      
     4   Fdd_power    1=on
     5   Input: PrinterNotFloppy
     6
     7

HWLatchPB (PCMCIA_B)
 Bit 0  Input: Docinsert 
     1
     2  ExtPwr        1=on
     3  TrkBall       1=external mouse, 0=internal trackerball
     4  Flash12V      1=Flash write power on, 0=off
     5
     6
     7

HWLatchMC (MORRIS_C)
 Bit 0  LCDInverter   1=off 0=backlight on
     1  LCDLogic      1=off 0=on
     2
     3  Input: DRAM type
     4
     5  Reset }
     6  Clock } 'Digi-pot' brightness and contrast controls
     7  Data  }

HWLatchMA (MORRIS_AtoD)
 Bit 0
     1
     2
     3
     4   Sound        1=on
     5
     6
     7


PrinterNotFloppy read from HWLatchPA + 4. Bit5 is 1=Floppy connected.
Docinsert read from HWLatchPB + 4. Bit0 is 1=Docking station connected.
DRAMtype read from MORRIS_C. Bit3 is 1=self-refresh, 0=slow-refresh.