2
CONTENTS
MANUAL ORGANIZATION .....................................................................................................................4
1. INTRODUCTION .................................................................................................................................5
PRODUCT DEFINITION .............................................................................................................5
FEATURES.................................................................................................................................5
FUNCTIONAL BLOCKS ..............................................................................................................6
STD 32 BUS INTERFACE ..............................................................................................6
INTERRUPTS.................................................................................................................7
FLOPPY DISK CONTROLLER .......................................................................................7
FLOPPY DISK DRIVE ....................................................................................................7
EXTERNAL FLOPPY INTERFACE .................................................................................7
2. GETTING STARTED ...........................................................................................................................8
UNPACKING...............................................................................................................................8
SYSTEM REQUIREMENTS ........................................................................................................8
CPU BOARDS SUPPORTING THE ZT 8954: ...........................................................9
CPU BOARDS NOT SUPPORTING THE ZT 8954:...................................................9
PHYSICAL REQUIREMENTS.........................................................................................9
POWER REQUIREMENTS.............................................................................................9
ENVIRONMENTAL REQUIREMENTS ..........................................................................10
INSTALLING THE ZT 8954 .......................................................................................................10
INTERRUPT SELECTION ............................................................................................10
DMA MODE SELECTION .............................................................................................10
JUMPER REQUIREMENTS - DOS AND STD 32 STAR SYSTEMS ..............................11
FRONTPLANE CONNECTORS ................................................................................................11
STD 32 COMPLIANCE..............................................................................................................12
3. THEORY OF OPERATION ................................................................................................................13
FREQUENTLY ASKED QUESTIONS........................................................................................13
WHY IS THE ZT 8954 IS INCOMPATIBLE WITH OLDER CPU BOARDS? ...................13
WHAT FLOPPY DISK DRIVES ARE SUPPORTED BY THE ZT 8954? .........................13
HOW DO I USE FRONTPLANE DMA? .........................................................................13
HOW DO I REMOTE MOUNT A FLOPPY DISK DRIVE? ..............................................13
STD BUS COMPATIBILITY .......................................................................................................14
STD BUS INTERFACE..............................................................................................................14
DATA TRANSFERS......................................................................................................14
MEMORY .....................................................................................................................14
I/O ................................................................................................................................14
FLOPPY DISK CONTROLLER REGISTERS ................................................................15
INTERRUPTS ...........................................................................................................................16
ZIATECH STD 32 STAR SYSTEM USE ....................................................................................16
STAR SYSTEM FLOPPY RULE ...................................................................................16
4. FDC DESCRIPTION (82078) .............................................................................................................17
PERPENDICULAR RECORDING MODE ..................................................................................18
STATUS, DATA, AND CONTROL REGISTERS ........................................................................18
STATUS REGISTER A (SRA).......................................................................................19
STATUS REGISTER B (SRB).......................................................................................19
TAPE DRIVE REGISTER (TDR) ...................................................................................21
DATARATE SELECT REGISTER (DSR) ......................................................................22
MAIN STATUS REGISTER (MSR)................................................................................24
DATA (FIFO) ................................................................................................................25
DIGITAL INPUT REGISTER (DIR) ................................................................................26
RESET......................................................................................................................................27
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