diskette is write protected (causes write
commands to be ignored)
25 HDSEL O Head Select. Selects the side for R/W
operations (0 = side 1, 1 = side 0)
26 DSKCHG I Disk Change. Sense that the drive door is
open or the diskette has been changed
Ethernet connector
Pin Signal I/O
1 TxD+ O
2 TxD- O
3 RxD+ I
4 Ground
5 Ground
6 RxD- I
7 Ground
8 Ground
External video connector
Pin Connector
1 Red
2 Green
3 Blue
4 Monitor ID2 - not
used
5 Ground
6 Red ground
7 Green ground
8 Blue ground
9 no connector
10 Gound
11 No connector
12 MON ID1
13 Horizontal sync
SurePOS 500 Model XX3 Technical Reference, v 1.3 Page 54 of
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