Pin Name Description Pin Name Description
20 GND Ground 54 GND Ground
21 ATN_H Attn + 55 ATN_L Attn -
22 GND Ground 56 GND Ground
23 BSY_H Busy + 57 BSY_L Busy -
24 ACK_H Acknowledge + 58 ACK_L Acknowledge -
25 RST_H Reset + 59 RST_L Reset -
26 MSG_H Message + 60 MSG_L Message -
27 SEL_H Select + 61 SEL_L Select -
28 CD_H CD + 62 CD_L CD -
29 REQ_H Request + 63 REQ_L Request -
30 I/O_H I/O + 64 I/O_L I/O -
31 D8_H Data 8 + 65 D8_L Data 8 -
32 D9_H Data 9 + 66 D9_L Data 9 -
33 D10_H Data 10 + 67 D10_L Data 10 -
34 D11_H Data 11 + 68 D11_L Data 11 -
Appendix - 9
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