Technical data

From Cable To

J43, SCSI MCBL176A External SCSI drives

J68, Fan Power MCBLZ177 System Fans

J64, Fan Power MCBLZ660 Vertical bay disk drive fan

J72, Power On LED MCBLZ610 Power On LED

J73, Disk Activity LED MCBLZ620 Disk Activity LED

J17, MCBL038A, MIDI

Signal Pin Signal Pin Signal

1 +5V 6 Y-axis, joystick 1 11 X-axis, joystick 2

2 Fire button 0 7 Fire button 1 12 MIDI out

3 X-axis, joystick 1 8 +5V 13 Y-axis, joystick 2

4 Ground 9 +5V 14 Fire button 3

5 Ground 10 Fire button 2 15 MIDI in

J22, MCBLZ630 (for SCSI drive) or MCBL122A (for EIDE drive), Audio

Signal

1 Right Sound Channel

2 Ground

3 Left Sound Channel

4 Ground

J30, MCBLZ380, Floppy

Signal Pin Signal Pin Signal

2 RPM 14 DRV0- 26 TRK0-

4 No connect 16 MTR1- 28 WRPRT-

6 DRATE0 18 DIR 30 RDATA-

8 INDEX- 20 STEP- 32 HDSEL

10 MTR0- 22 WDATA- 34 DSKCHG

12 DRV1- 24 WGATE-

NOTE All odd-numbered pins of J30 are connected to ground, except pin 29 (MID1) and pin 33 (MID0).