I-Bus Hawkfish User manual

Hawkfish User’s Guide
Hawkfish™
Single Board Computer
User’s Guide
#095-00002-00, Rev. A

Hawkfish User’s Guide
@Copyright 1999
All Rights Reserved
The information in this document is subject to change without prior notice in order to
improve reliability, design, and function and does not represent commitment on the part
of the manufacturer.
In no event will the manufacturer be liable for direct, indirect, special, incidental, or con-
sequential damages arising out of the use or the possibility of such damages.
This document contains proprietary information protected by copyright. All rights are
reserved. No part of this manual may be reproduced by any mechanical, electronic, or
other means in any form without prior written permission of the manufacturer.
Trademarks
IBM PC is a registered trademark of International Business Machines Corporation.
Intel and Pentium are registered trademarks of Intel Corporation. Award is a registered
trademark of Award Software, Inc. Other product names mentioned herein are used for
identification purposes only and may be trademarks and/or registered trademarks of
their respective companies.
Customer Service
Mailing Address: I-Bus, A Maxwell Technologies Company
9174 Sky Park Court
San Diego, CA 92123
Telephone: [phone]
[phone] (in the U.S.)
Direct Sales: [phone]
Technical Support: (877) 777-IBUS (4287)
FAX: [phone]
E-mail: [email protected]
WEB: www.ibus.com

i
Hawkfish User’s Guide
Chapter 1 Introduction
What You'll Have From the Package . . . . . . . . . . . . . .1-2
Chapter 2 Switches and Connectors
Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
Switch Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2
Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-5
Connector Functions . . . . . . . . . . . . . . . . . . . . . . . . . .2-6
Pin Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-7
Chapter 3 Technical Specifications
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-1
Environmental Specifications . . . . . . . . . . . . . . . . . . . .3-5
Chapter 4 CPU Board
System Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
Installing the DIMM . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2
Changing the CPU Board . . . . . . . . . . . . . . . . . . . . . .4-3
Installing the CPU . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.4
Chapter 5 Award BIOS Setup
Entering Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1
Control Keys . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-2
Getting Help . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-3
The Main Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-4
Standard CMOS Setup Menu . . . . . . . . . . . . . . . . . . .5-7
BIOS Features Setup Menu . . . . . . . . . . . . . . . . . . . .5-10
Chipset Features Setup Menu . . . . . . . . . . . . . . . . . . .5-15
Table of Contents

ii
Hawkfish User’s Guide
Power Management Setup . . . . . . . . . . . . . . . . . . . . .5-20
PnP/PCI Configuration . . . . . . . . . . . . . . . . . . . . . . . .5-25
Integrated Peripherals . . . . . . . . . . . . . . . . . . . . . . . . .5-26
Supervisor/User Password Setting . . . . . . . . . . . . . . .5-30
IDE HDD Auto Detection . . . . . . . . . . . . . . . . . . . . . . .5-31
Hard Disk Low Level Format Utility . . . . . . . . . . . . . . .5-34
Power On Boot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-35
BIOS Reference - POST Message . . . . . . . . . . . . . . .5-35
BIOS Reference - POST Codes . . . . . . . . . . . . . . . . .5-41
BIOS Default Drive Table . . . . . . . . . . . . . . . . . . . . . .5-46
Appendix 1 Watch Dog Timer
Watch Dog Timer Working Procedure . . . . . . . . . . . . .A1-1
Watch Dog Timer Character and Function . . . . . . . . . .A1-1
Watch Dog Timer Control Register . . . . . . . . . . . . . . .A1-2
Watch Dog Timer Programming Procedure . . . . . . . . .A1-3
Appendix 2 Memory Mapping
Memory Mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . .A2-1
Appendix 3 Limited Warranty
Appendix 4 FCC Information
Appendix 5 Declaration of Conformity
List of Figures
Figure 2-1 Switch Positions . . . . . . . . . . . . . . . . . . . .2-1
Table of Contents

Hawkfish User’s Guide
iii
Figure 2-2 Connector Positions . . . . . . . . . . . . . . . . .2-5
Figure 4-1 Installing DIMM . . . . . . . . . . . . . . . . . . . . .4-2
Figure 4-2 Changing the CPU . . . . . . . . . . . . . . . . . .4-3
Figure 5-1 Main Menu . . . . . . . . . . . . . . . . . . . . . . . .5-3
Figure 5-2 Standard CMOS Setup Menu . . . . . . . . . .5-6
Figure 5-3 BIOS Features Setup Menu . . . . . . . . . . .5-10
Figure 5-4 Chipset Features Setup Menu . . . . . . . . .5-16
Figure 5-5 Power Management Setup . . . . . . . . . . . .5-21
Figure 5-6 PnP/PCI Configuration . . . . . . . . . . . . . . .5-25
Figure 5-7 Integrated Peripherals . . . . . . . . . . . . . . .5-26
Figure 5-8 IDE HDD Auto Detection . . . . . . . . . . . . .5-31
Figure 5-9 Low Level Format Utlility Main Menu . . . .5-33
Figure A1-1 Watch Dog Timer Control Register . . . . . .A1-2
Figure A2-1 Memory Mapping . . . . . . . . . . . . . . . . . . .A2-1
List of Tables
Table 2-1 VCORE Voltage . . . . . . . . . . . . . . . . . . . . .2-2
Table 2-2 Sensor SMI . . . . . . . . . . . . . . . . . . . . . . . .2-2
Table 2-3 Intel Processor . . . . . . . . . . . . . . . . . . . . .2-2
Table 2-4 VCC3 Voltage . . . . . . . . . . . . . . . . . . . . . .2-2
Table 2-5 CPUVIO Voltage . . . . . . . . . . . . . . . . . . . .2-2
Table 2-6 CPU CLK (MHz) . . . . . . . . . . . . . . . . . . . .2-3
Table 2-7 SDRAM Refresh Rate (MHz) . . . . . . . . . . .2-3
Table 2-8 About Panel . . . . . . . . . . . . . . . . . . . . . . . .2-3
Table 2-9 Panel Type Settings . . . . . . . . . . . . . . . . . .2-3
Talbe 2-10 Panel Types . . . . . . . . . . . . . . . . . . . . . . .2-3
Table 2-11 M-System Address . . . . . . . . . . . . . . . . . .2-4
Table 2-12 BIOS Refresh . . . . . . . . . . . . . . . . . . . . . .2-4
Table 2-13 SCSI Terminator . . . . . . . . . . . . . . . . . . . .2-4

Hawkfish User’s Guide
iv
Table 2-14 8/16 Bit SCSI . . . . . . . . . . . . . . . . . . . . . .2-4
Table 2-15 CMOS RAM . . . . . . . . . . . . . . . . . . . . . . .2-4
Table 2-16 ATX Power . . . . . . . . . . . . . . . . . . . . . . . .2-4
Table 2-17 Panel Voltage . . . . . . . . . . . . . . . . . . . . . .2-4
Table 2-18 Connector Function . . . . . . . . . . . . . . . . .2-6
Table 2-19 J1 Fan Connector . . . . . . . . . . . . . . . . . . .2-7
Table 2-20 J5/J6 IDE Interface Connector . . . . . . . . .2-7
Table 2-21 J7 Panel Connector . . . . . . . . . . . . . . . . .2-8
Table 2-22 Description Table . . . . . . . . . . . . . . . . . . .2-9
Table 2-23 J9 LED Connector . . . . . . . . . . . . . . . . . .2-9
Table 2-24 J10 Reset . . . . . . . . . . . . . . . . . . . . . . . . .2-9
Table 2-25 J12 FDC Connector . . . . . . . . . . . . . . . . .2-10
Table 2-26 J14 Parallel Port Connector . . . . . . . . . . .2-10
Table 2-27 J15/J22 COM2/COM1 . . . . . . . . . . . . . . . .2-11
Table 2-28 J16 USB Connector . . . . . . . . . . . . . . . . .2-11
Table 2-29 J17 Speaker . . . . . . . . . . . . . . . . . . . . . . .2-11
Table 2-30 J18 Keylock . . . . . . . . . . . . . . . . . . . . . . .2-12
Table 2-31 J19 Keyboard Connector . . . . . . . . . . . . .2-12
Table 2-32 J20 VGA Connector . . . . . . . . . . . . . . . . .2-13
Table 2-33 J21 PS/2 Mouse Connector . . . . . . . . . . .2-13
Table 2-34 J23 PS/2 Keyboard/Mouse Connector . . . .2-14
Table 2-35 JP3 External SPEED LED for LAN . . . . . .2-14
Table 2-36 JP4 External ACTIVE LED for LAN . . . . . .2-14
Table 2-37 JP5 External LINK LED for LAN . . . . . . . .2-14
Table 2-38 JP6 External SCSI LED . . . . . . . . . . . . . .2-15
Table 2-39 JP7 Wide SCSI 68-Pin High Density . . . . .2-16
Table 2-40 JP8 ATX Controller . . . . . . . . . . . . . . . . . .2-17
Table 2-41 ATX Button-In . . . . . . . . . . . . . . . . . . . . . .2-17
Table 2-42 IR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-17

Hawkfish User’s Guide
v
Table 2-43 External SMBUS Connector . . . . . . . . . . .2-17
Table 2-44 P2 LAN Connector . . . . . . . . . . . . . . . . . .2-18
Table 4-1 DIMM Configuration . . . . . . . . . . . . . . . . . .4-1
Table 5-1 Control Keys . . . . . . . . . . . . . . . . . . . . . . .5-2
Table 5-2 Standard CMOS Setup . . . . . . . . . . . . . . .5-31
Table 5-3 BIOS Reference POST Codes . . . . . . . . . .5-41
Table 5-4 BootBlock POST Codes . . . . . . . . . . . . . . .5-42
Table 5-5 Non-Compressed Version POST Codes . . .5-43
Table 5-6 Compress and Non-Compressed Versions
POST Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-44
Table 5-7 BIOS Default Drive Table . . . . . . . . . . . . . .5-46
Table A1-1 Watch Dog Timer Character and Function .A1-1

Hawkfish User’s Guide
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vi

1-1
Welcome to the Hawkfish Pentium/Socket 7 single board computer.
The Hawkfish is a brand new generation of proven technologies. It is
built with a high performance, cost effective Pentium/Socket 7 CPU
with up to 233 MHz, high performance PCI Bus and I/O's, large memo-
ry support (256MB), and complies with the new PICMG standard.
Furthermore, this is the first Pentium/Socket 7 SBC designed with all
advanced features on one SBC.
The Hawkfish can run with a Intel Pentium MMX processor up to 266
MHz, and memory support up to 256 MB SDRAM. The on board
enhanced PCI IDE interface can support up to mode 4 PIO and Mode 2
DMA master which also supports Ultra DMA 33. The on board Adaptec
AIC 7880 is the popular high performance PCI SCSI master with ultra
and ultra wide SCSI interfaces.
The ultra wide SCSI now supports 40MB/s data rate that is high enough
for mass storage access. The new C&T 69000 VGA Controller with
2MB embedded SDRAM can support both CRT and panel displays.
The Intel single chip 82558 Ethernet Controller supports 10 Base T/ 100
Base TX, full Duplex. An On board PCI Device, the Intel 21152 PCI
Bridge Controller is used.
The SMC 37C932 integrates the floppy controller, two serial ports, one
parallel port, and keyboard/mouse controller. The two on-chip UARTs
are compatible with the NS 16C550, and the parallel port supports
EPP/ECP.
The PICMG standard ensures the Hawkfish works with the ISA and
PCI backplanes. The system monitor can check voltage levels, fan
speeds and temperatures. The flash ROM is used to make the BIOS
update easier. An additional keyboard connector is reserved for the
keyboard connector on the back plane. The Universal Serial Bus (USB)
is also available for flexible connections. The high precision real-time
clock/calendar provides accurate scheduling. The watch dog timer is
also a standard feature.
Chapter 1 - Introduction
Hawkfish User’s Guide

Hawkfish User’s Guide
1-2
What you'll have from the package
In addition to this manual, the Hawkfish series package includes the fol-
lowing items:
· Hawkfish series single board computer x 1
· SIO+PIO cable x1
· FDC cable x 1
· IDE cable x 1
· 5 pin to 5 pin keyboard cable x 1 (for DIN keyboard connector)
· Wide SCSI cable x 1
· Adaptec SCSI Drivers Diskettes x 3
· Manuals for Adaptec SCSI drivers x 2
· VGA Driver diskette x 1
· LAN Driver diskette x 1
· System Monitor Driver diskette x 2
If any of these items are missing or damaged, please contact I-Bus.
Chapter 1 - Introduction

Hawkfish User’s Guide
2-1
This chapter gives the definitions and locations of the switches and con-
nectors.
Switches
Switches on the CPU board are used to select options for different func-
tions. The switch-on or off is to accommodate the variations on the fol-
lowing table.
Chapter 2 - Switches and Connectors
J
P
2
J
1
6
J
2
0
JP
17
DIMM0/J2
DIMM1/J3 COM2/J15
J20
J22
J23
FDD CONN/J12
Primary IDE(J5)
Secondary IDE(J6)
PIO/J14
SCSI/J18
J16
M-system
J19
RTC
Socket 7
430TX
PII X 4 69000
82558
JP1
7880 JP10
JP9
JP8
JP2
SW1
SW3
SW4
SW2 SW5
SW6
W
JP11
J1 Panel Connector J7
J 9
JP7
J18
J17
J21
JP6
J10
JP3 JP5
JP4
P2
FDC37C932F
Figure 2-1 Switch Positions

Hawkfish User’s Guide
2-2
VCORE Voltage 1.9V 2.2V *2.8V 2.9V 3.2V 3.3V 3.5V
P266/P166 K6/K6-2 266 P55C K6-166 K6-233 WINCHIP
(0.25micron) K6/K6-2 300 K6-200 P54C
K6-2 333
SW1.1 ON OFF OFF OFF OFF OFF OFF
SW1.2 ON OFF ON ON ON ON ON
SW1.3 ON OFF OFF OFF ON ON ON
SW1.4 OFF ON OFF OFF OFF OFF ON
SW1.5 OFF OFF OFF ON OFF ON ON
Table 2-1: VCORE Voltage
Sensor SMI Enable *Disable
SW1.6 ON OFF
Table 2-2: Sensor SMI
For INTEL Processor
SW2.1 SW2.2 SW2.3 SW2.4 SW2.5 SW2.6 SW2.7 SW2.8 Core/Bus Ratio
ON OFF ON OFF - - - - 1.5x
OFF ON ON OFF OFF ON - - 2.0x
OFF ON OFF ON OFF ON - - 2.5x
ON OFF OFF ON OFF ON - - 3.0x
ON OFF ON OFF OFF ON - - *3.5x
OFF ON OFF ON ON OFF - - 4.0x
Table 2-3: Intel Processor
VCC3 Voltage *3.3V 3.45V
SW3.1 ON OFF
SW3.2 OFF ON
Table 2-4: VCC3 Voltage
CPUVIO Voltage 2.5V *3.3V 3.45V
SW3.3 ON OFF OFF
SW3.4 OFF ON OFF
SW3.5 OFF OFF ON
SW3.6 ON OFF OFF
SW4.4 OFF ON ON
SW4.5 ON OFF OFF
Table 2-5: CPUVIO Voltage
Chapter 2 - Switches and Connectors

Hawkfish User’s Guide
2-3
CPU CLK(MHz) 50.0 75.0 83.3 68.5 83.3 75.0 60.0 *66.8
PCI CLK 25.0 32.0 41.65 34.25 33.3 37.5 30.0 33.4
SW4.1 ON ON ON ON OFF OFF OFF OFF
SW4.2 ON ON OFF OFF ON ON OFF OFF
SW4.3 ON OFF ON OFF ON OFF ON OFF
Table 2-6: CPU CLK (Mhz)
SDRAM Refresh Rate(MHz) *66 60
SW4.6 ON OFF
Table 2-7: SDRAM Refresh Rate(MHz)
About PANEL Default Reserved
SW5.1 *OFF ON
SW5.2 *ON OFF
SW5.3 -
SW5.4 -
Table 2-8: About Panel
PANEL Types 1 2 3 4 5 6 7 8 9 *10 11 12 13 14 15 16
SW5.5 ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF
SW5.6 ON ON OFF OFF ON ON OFF OFF ON ON OFF OFF ON ON OFF OFF
SW5.7 ON ON ON ON OFF OFF OFF OFF ON ON ON ON OFF OFF OFF OFF
SW5.8 ON ON ON ON ON ON ON ON OFF OFF OFF OFF OFF OFF OFF OFF
Table 2-9: Panel Type Settings
PANEL Types
1 1024x768 Dual Scan STN Color Panel
2 1280x1024 TFT Color Panel
3 640x480 Dual Scan STN Color Panel
4 800x600 Dual Scan STN Color Panel
5 640x480 Sharp TFT Color Panel
6 640x480 18-bit TFT Color Panel
7 1024x768 TFT Color Panel
8 800x600 TFT Color Panel
9 800x600 TFT Color Panel (Large BIOS only)
10 800x600 TFT Color Panel (Large BIOS only)
11 800x600 Dual Scan STN Color Panel (Large BIOS only)
12 800x600 Dual Scan STN Color Panel (Large BIOS only)
13 1024x768 TFT Color Panel (Large BIOS only)
14 1280x1024 Dual Scan STN Color Panel (Large BIOS only)
15 1024x600 Dual Scan STN Color Panel (Large BIOS only)
16 1024x600 TFT Color Panel (Large BIOS only)
Table 2-10: Panel Types
Chapter 2 - Switches and Connectors

Hawkfish User’s Guide
Switch Settings
2-4
M-SYSTEM ADDRESS *Disable C0000 C8000 D0000 D8000
SW6.1 OFF ON ON ON ON
SW6.2 - ON ON OFF OFF
SW6.3 - ON OFF ON OFF
Table 2-11: M-SYSTEM ADDRESS
BIOS Refresh Enable *Disable
SW6.4 ON OFF
Table 2-12: BIOS refresh
SCSI Terminator *Enable Disable
SW6.5 ON OFF
Table 2-13: SCSI Terminator
8/16 Bit SCSI *16 Bit 8 Bit
SW6.6 ON OFF
Table 2-14: 8/16 Bit SCSI
CMOS RAM Clear *Normal
SW6.7 ON OFF
Table 2-15: CMOS RAM
ATX Power *No USE Use
SW6.8 ON OFF
J9 NC 1-2
Table 2-16: ATX Power
PANEL Voltage *3.3V 5V
JP2 2-3 1-2
Table 2-17: Panel Voltage
Chapter 2 - Switches and Connectors

Hawkfish User’s Guide
2-5
Connectors
Connectors on the CPU Board provide interfaces to other devices.
J
P
2
J
1
6
J
2
0
JP
17
DIMM0/J2
DIMM1/J3 COM2/J15
J20
J22
J23
FDD CONN/J12
Primary IDE(J5)
Secondary IDE(J6)
PIO/J14
SCSI/J18
J16
M-system
J19
RTC
Socket 7
430TX
PII X 4 69000
82558
JP1
7880 JP10
JP9
JP8
JP2
SW1
SW3
SW4
SW2 SW5
SW6
W
JP11
J1 Panel Connector J7
J 9
JP7
J18
J17
J21
JP6
J10
JP3 JP5
JP4
P2
FDC37C932F
Figure 2-2: Connector Positions
Chapter 2 - Switches and Connectors

Hawkfish User’s Guide
2-6
Connectors Functions
Connector Function Remark
J1 FAN Conn.
J2 DIMM 0
J3 DIMM 1
J5 Primary IDE
J6 Secondary IDE
J7 PANEL Conn.
J9 IDE LED Conn.
J10 Reset
J12 Floppy
J14 PIO
J15 COM2
J16 USB Conn.
J17 Speaker
J18 Keylock
J19 Keyboard.
J20 VGA Conn. CRT
J21 PS/2 Mouse
J22 COM1
J23 PS/2 Keyboard
JP1 CPU Temperature Sensor Pin
JP2 Panel Voltage 3.3V/5V
JP3 SPEED LED For LAN
JP4 ACTIVE LED For LAN
JP5 LINK LED For LAN
JP6 SCSI LED
JP7 Ultra Wide SCSI
JP8 ATX Controller
JP9 ATX Button-in
JP10 IR
JP11 SM BUS
P2 LAN Connector
Table 2-18: Connector Functions
Chapter 2 - Switches and Connectors

Hawkfish User’s Guide
2-7
Pin Definitions
·J1: Fan Connector
·J5 /J6: IDE Interface Connector
Pin No. Description
1 GND
2 +12V
3 Sense
Table 2-19: J1 Fan Connector
Pin No. Description Pin No. Description
1 Reset# 2 Ground
3 Data 7 4 Data 8
5 Data 6 6 Data 9
7 Data 5 8 Data 10
9 Data 4 10 Data 11
11 Data 3 12 Data 12
13 Data 2 14 Data 13
15 Data 1 16 Data 14
17 Data 0 18 Data 15
19 Ground 20 N/C
21 DMA REQ 22 Ground
23 IOW# 24 Ground
25 IOR# 26 Ground
27 IOCHRDY 28 N/C
29 DMA ACK 30 Ground
31 Interrupt 32 IOCS16#
33 SA1 34 N/C
35 SA0 36 SA2
37 HDC CS0# 38 HDC CS1#
39 HDD Active# 40 Ground
Table 2-20: J5/J6 IDE Interface Connector
Chapter 2 - Switches and Connectors

Hawkfish User’s Guide
2-8
·J7: Panel Connector
Pin No. Description Pin No. Description
1 ENABKL 2 +12V SAFE
3LP 4DE
5 SHFCLK 6 FLM
7 PO 8 VDDSAFE
9P2 10P1
11 P4 12 P3
13 P6 14 P5
15 P8 16 P7
17 P10 18 P9
19 P12 20 VDDSAFE
21 P14 22 P11
23 GND 24 P13
25 P16 26 P15
27 P18 28 P17
29 P20 30 ENAVEE
31 P22 32 P19
33 GND 34 P21
35 P24 36 P23
37 P26 38 P25
39 M/PCLK 40 GND
41 P28 42 P27
43 P30 44 P29
45 P32 46 P31
47 P34 48 P33
49 GND 50 P35
Table 2-21: J7 Panel Connector
Chapter 2 - Switches and Connectors

Hawkfish User’s Guide
2-9
·J9: IDE LED Connector
·J10: Reset
Description Table
ENABKL Backlight enabled control pin (Active high)
+12V SAFE Backlight power +12V
LP Latch Pulse/HSYNC Single
DE Display Enable
SHFCLK Shift Clock/Pixel Clock
FLM First Line Marker/VSYNC
P0 –P35 Digital R.G.B. Signal Pixel Data
VDDSAFE Panel Power
GND Ground Pin
ENAVEE Panel Bias Voltage
M/PCLK Display Enable/Video in port PCLK output
Table 2-22: Description Table
Pin No. Description
1 +5V
2 HDD Active #
Table 2-23: J9 LED Connector
Pin No. Description
1 Reset
2 Ground
Table 2-24: J10 Reset
Chapter 2 - Switches and Connectors

Hawkfish User’s Guide
2-10
·J12: FDC Connector
·J14: Parallel Port Connector
Pin No. Description Pin No. Description
1 Ground 2 Density Select
3 Ground 4 N/C
5 Ground 6 N/C
7 Ground 8 Index#
9 Ground 10 Motor Enable A#
11 Ground 12 Drive Select B#
13 Ground 14 Drive Select A#
15 Ground 16 Motor Enable B#
17 Ground 18 Direction#
19 Ground 20 Step#
21 Ground 22 Write Data#
23 Ground 24 Write Gate#
25 Ground 26 Track 0#
27 Ground 28 Write Protect#
29 N/C 30 Read Data#
31 Ground 32 Head Side Select#
33 N/C 34 Disk Change#
Table 2-25: J12 FDC Connector
Pin No. Description Pin No. Description
1 Strobe# 14 Auto Form Feed#
2 Data 0 15 Error#
3 Data 1 16 Initialize
4 Data 2 17 Printer Select IN#
5 Data 3 18 Ground
6 Data 4 19 Ground
7 Data 5 20 Ground
8 Data 6 21 Ground
9 Data 7 22 Ground
10 Acknowledge 23 Ground
11 Busy 24 Ground
12 Paper Empty 25 Ground
13 Printer Select 26 GND
Table 2-26: J14 Parallel Port Connector
Chapter 2 - Switches and Connectors