PIN
No./QFP
NAME
TOTAL
SYMBOL
nHDSEL
nDIR
nSTEP
nDSKCHG
nDS0
nDS1
nMTR0
nMTR1
nWRTPRT
nTRKO
BUFFER TYPE
12
8
9
17
5
6
3
4
15
14
13
1
Head Select
Step Direction
Step Pulse
Disk Change
Drive Select 0
1
1
1
1
1
1
1
1
1
1
1
1
1
O24
O24
O24
IS
O24
IO24
O24
IO24
IS
IS
IS
O24
IO24
Drive Select 1/GP17
Motor On 0
Motor On 1/GP16
Write Protected
Track 0
Index Pulse Input
Drive Density Select 0
Drive Density Select 1/GP52/IRQ8/nSMI
nINDEX
DRVDEN0
DRVDEN1
2
GENERAL PURPOSE I/O (6)
77
78
79
General Purpose 10/nSMI
1
1
1
GP10
GP11
GP12
IO12
IO4
IO4
General Purpose 11/nRING/EETI (Note 4)
General Purpose 12/WDT/P17/P12/EETI
(Note 4)
80
81
82
General Purpose 13/LED Driver
General Purpose 14/Infrared Rx
General Purpose 15/Infrared Tx (Note 3)
1
1
1
GP13
GP14
GP15
IO24
IO4
IO24
BIOS INTERFACE (10)
83
84
85
86
87
88
89
90
91
92
ROM Bus 0/IRQ1/GP60/nSMI
ROM Bus 1/IRQ3/GP61/LED
ROM Bus 2/IRQ4/GP62/nRING
ROM Bus 3/IRQ5/GP63/WDT
ROM Bus 4/IRQ6/GP64/P17/P12
ROM Bus 5/IRQ7/GP65
ROM Bus 6/IRQ8/GP66
ROM Bus 7/IRQ10/GP67
nROMCS/IRQ11/GP53/EETI (Note 4)
nROMOE/IRQ12/GP54/EETI (Note 4)
1
1
1
1
1
1
1
1
1
1
RD0
RD1
RD2
RD3
RD4
RD5
RD6
RD7
IO12
IO24
IO12
IO12
IO12
IO12
IO12
IO12
IO12
IO12
nROMCS
nROMOE
SERIAL PORT 1 INTERFACE (8)
112
113
115
Receive Serial Data 1
Transmit Serial Data 1
Request to Send 1
1
1
1
RXD1
TXD1
I
O4
IO4
nRTS1/
SYSOP
nCTS1
nDTR1
nDSR1
nDCD1
nRI1
116
117
114
119
118
Clear to Send 1
1
1
1
1
I
Data Terminal Ready 1
Data Set Ready 1
Data Carrier Detect 1
Ring Indicator 1
O4
I
I
I
1
SERIAL PORT 2 INTERFACE (8)
123
Receive Serial Data 2/Infrared Rx
1
RXD2/IRRX
I
8