Specifications

FIGURES
Figure 1-1
Figure 2-1
Figure 2-2
Figure 4-1
TABLES
Table 2-1
Table 2-2
Table 2-3
Table 2-4
Table 2-5
Table
2-6
Table 2-7
Table
2-8
Table 2-9
Table
2-10
Table 2-11
Table
2-U
Table 2-13
Table 2-14
Table 2-15
Table 2-16
Table 2-17
Table 2-18
Table 2-19
Table 2-20
Table 2-21
Table 2-22
Table 2-23
Table 2-24
Table 2-25A
Table 2-25B
Table 4-1
Table
5-1
Table 5-2
Table 5-3
Table 5-4
Table 5-5
Table 5-6
Little Board/PC Mechanical Dimensions ................................................... 1-4
Connector and Jumper Locations ................................................................ 2-2
Power Connector Wiring ............................................................................... 2-4
Little
Board/PC Block Diagram .................................................................. 4-1
Summary
of Connector Usage ...................................................................... 2-3
Power Connector
Usage (J1) ........................................................................ 2-4
Power Consumption
vs. Configuration ........................................................ 2-5
Onboard DRAM Memory Size Jumpering ................................................. 2-6
U26
Device Jumpering .................................................................................. 2-8
U15 Device Jumpering .................................................................................. 2-9
Video Display Mode ...................................................................................... 2-9
I/O Wait States ............................................................................................... 2-10
Utility
Connector (J4) .................................................................................... 2-11
Keyboard Connector
(J5) .............................................................................. 2-U
Parallel Printer Connector (J6) .................................................................... 2-13
Parallel Printer Configuration ...................................................................... 2-13
PC Serial Port Connections ........................................................................... 2-14
PC Serial Port Configurations ...................................................................... 2-15
V40 Serial Port Connections ......................................................................... 2-16
Supported Floppy Formats ............................................................................ 2-17
Floppy Disk Interface Connector (J8) ......................................................... 2-18
Floppy Drive Quantity ................................................................................... 2-19
Drive A
Type Selection .................................................................................. 2-19
Drive B
Type Selection .................................................................................. 2-19
Floppy Interface
Options ............................................................................... 2-20
SCSI Interface Connector (J7) ..................................................................... 2-21
SCSI Initiator ID Jumpering ......................................................................... 2-24
SCSI Interface Option Jumpers .................................................................... 2-25
PC Expansion Bus Connector, AI-A32 (J9) ............................................... 2-29
PC Expansion Bus Connector, B1-B32 (J9) ............................................... 2-30
DMA Channel Remapping ........................................................................... 4-7
Little
Board/PC Memory Map ..................................................................... 5-2
Little Board/PC I/O Map ............................................................................. 5-3
V 40 Internal Peripheral Control Registers ................................................. 5-5
ROM-BIOS Default V40 Initialization ...................................................... .5-6
53C8O Internal Registers ............................................................................... 5-7
Jumper Input Port .......................................................................................... 5-9