Specifications

3.7 Using Floppy Drl\ies ...................................................................................................... .3-8
3.8
Using SCSI Hard Disk Drl\ies ....................................................................................... 3-8
3.8~1 Hardware Preparation .................................................................................. .3-8
3.8.2 Preparation for DOS Use .............................................................................. 3-9
CHAPTER .. - THEORY OF OPERATION
4.1 Introduction ..................................................................................................................... 4-1
4.2 Technical References ..................................................................................................... 4-1
4.3
CPU and General Architecture .................................................................................... 2-4
4.4 V40 Internal Peripherals ................................................................................................ 4-4
4.4.1 Interrupt Controller ....................................................................................... 4-5
4.4.2 COuntertrimers .............................................................................................. 4-5
4.4.3
DMA Controller ............................................................................................. 4-6
4.4.4 Wait State Control .......................................................................................... 4-7
4.5 Onboard Memory ...........................................................................................................
4-8
4.5.1 DRAM Sockets ............................................................................................... 4-8
4.5.2
EPROM Socket .............................................................................................. 4-9
4.5.3 Byte·Wide Sockets (U15 and
U26) .............................................................. 4-9
4.6 Onboard
I/O Interfaces ............................................................................... -.................. 4-10
4.6.1 V40 Serial Port ................................................................................................ 4-10
4.6.2 Parallel Printer Port ....................................................................................... 4-11
4.6.3
Keyboard Interfaces ....................................................................................... 4-11
4.6.4 Speaker Interface ............................................................................................ 4-12
4.6.5
PC COnfJgUration Switches ............................................................................ 4-12
4.6.6
PC Serial Port ................................................................................................. 4-12
4.6.7 Floppy Disk Controller .................................................................................. 4-13
4.6.8
SCSI Bus Interface ........................................... : ............................................. 4-13
4.7
PC Bus Interface ............................................................................................................. 4-14
CHAPTER 5 - PROGRAMMING INFORMATION
5.1 Introduction .................................................................................................................... .5-1
5.2 System Memory Map ...................................................................................................... 5-1
5.3 I/O Address Map ............................................................................................................ 5-1
5.4 V 40 Internal Registers ................................................................................................... .5-4
5.5 V 40 Initialization ............................................................................................................ .5-4
5.6 SCSI Interface ................................................................................................................ .5-7
5.6.1 SCSI Programming ........................................................................................ .5-7
5.6.2 Simple Bidirectional I/O .............................................................................. .5-8
5.6.3 Jumper Input Port ......................................................................................... .5-8
5.6.4 Ampro SCSI/BIOS ........................................................................................ 5-9
APPENDIX A - UTTLE BOARD/PC UTiUTIES SOFTWARE
CONDRVR.syS
PRNDRVR.syS
SCSI·ID
SCSICOMP
SCSICOPY
SCSIFMT
SCSIPARK
SCSITOOL
SETWAIT