Dynabyte 5505 User manual

5505
Computer Unit
Technical Manual

1.
2.
3.
4.
5.
6.
7.
GENERAL
Features.
PHYSICAL DESCRIPTION •
Front Panel
Rear Panel
Card
Cage -- S-IOO Bus.
S-IOO Bus Cards •
Power Supply fvt:>dule •
Diskette Drive.
Winchester Drive.
FUNCTIONAL DESCRIPTION •
SPECIFICATIONS •
5505 CCJt1PUTER
MAINTENANCE
TABLE OF CONTENTS
OPERATION AND INSTALLATION •
Unpacking
Ac Line •
Options •
Set Up and Turn On.
MAINTENANCE.
Customer Support Service.
Repacking and Returning Material.
Diagnostics •
Fault Location.
Power Supply fvt:>dule Voltages and Adjustment
Removing Assemblies •
REFERENCES •
S-100
Bus •
.,
Schematics and Replaceable Parts.
OEM EquiJ;ment •
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5505 Technical Manual 404512
ILLUSTRATIONS
. ... • 5
Table 1-1 -- 5505 Computer, Models •••
Figure 2-1 -- 5505 Computer, Front Panel . . . . . . . . • 5
Table 2-1 -- 5505 Computer, Front Panel Controls and Indicators. • • • • 6
Figure 2-2 -- 5505 Computer, Rear Panel. • • • • • • • • • • • • 8
Table 2-2 -- 5505 Computer, Rear Panel Controls and Connectors. • 8
Table 2-3 -- 5505 Computer, Interior Major Assemblies •••
Figure 3-1 -- 5505 Computer Functional Block Diagram •
Table 4-1 -- 5505 Computer Functional Specifications • ..
Figure 5-1 -- Central Processing Unit, Option Switch Settings.
Figure 5-2 -- 641< Random Access Memory, Option Switch Settings •
.13
.17
.22
• .31
••• 32
Figure 5-3 -- Disk Controller, Option Switch Settings ••••••
.. .33
.34
.37
Figure 5-4 -- Auxiliary Disk Controller, Option Switch Settings ••
Figure 6-1 -- Dynabyte Identification Plate. • • • • • • • • •
Figure 6-2 -- Power Supply Module Voltage Test Points, BS1 ••••
Table 6-1 -- Troubleshooting Chart • • • • • • •
Table 7-1 -- Dynabyte 8-100 Bus Pin Assignments. • •
Figure 7-1 -- 5505 Computer Chassis Wiring Diagram • •
Table 7-2 --. 5505 Computer Replaceable Parts List.
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5505 Technical Manual
404512
1. GENERAL
1.01 This manual provides a physical and functional description and
the operating theory necessary for effective installation and field service of
the 5505 Computer.
Features
1.02 The 5505 Computer, illustrated on the title page, is supplied indivi-
dually or as a system component to a larger Dynabyte computer system. Its
features include the following:
• Z-80 microprocessor operating at 4 MHz.
• Two serial, software-programmable 110 to 76,800 baud ports. Each of
the ports' data lines may be configured to an RS-232C level or 20 rnA
current loop data communication line interface.
• One parallel port wi th full handshaking logic.
• Double Density Diskette Controller.
• Mini~inchester Controller.
• Built-in Diskette Drive in single-sided or double-sided
configuration (see Table 1-1).
• Built-in Mini~inchester Drive (see Table 1-1).
• Ten internal timers.
• Sixteen priortized vectored interrupts.
• A real-time clock.
• 64K of Random Access Memory. Optional memory to 400K bytes can also
be provided with multiple memory cards.
• The power supply module features pre regulation to minimize
operational problems from brown outs and line voltage surges.
• Efficient cooling of the 5505 S-IOO cards and power supply is assured
by a 4-5/8 inch axial fan furnishing air through the chassis and
exhausted
out through the rear panel.
• The backplane is shielded and fully socketed for 12 S-IOO card
positions.
• Heavy' duty metal construction.
• The front panel switches POWER and RESET-HALT are illuminated.
• A line fuse is provided for ac line protection.
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5505 Technical Manual
404512
• Each internal subassembly is modular and is unit-replaceable for ease
in servicing.
• Each 5505 carries a lBO-day warranty on parts and labor from the date
of shipment from Dynabyte.
• Each 5505 is burned in for a minimum of 72 hours.
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5505 Technical Manual 404512
Table 1-1 -- 5505 ~omputer, Models
5505 -Al 5505 -
Bl
5505 - Cl
Floppy Disk Drive
Surfaces 1 2 2
Unfonnatted Capacity
500K
1000K
1000K
Fonnatted Capacity
315K
655K
655K
Winchester Hard Disk Drive
Surfaces
4 4 6
Unfonnatted Capacity
6. 4MB
10. 67MB
16MB
Formatted Capacity 5. 32MB
a.9MB
13.4MB
1.03 Dynabyte maintains hardware and software compatibility with Dynabyte
S-100 .cards used in the Dynabyte S-IOO Bus only. S-IOO I/O cards, e.g.,
modems, clocks, and parallel ports from other manufacturers will be compatible
with the Dynabyte S-100 Bus in most cases. Contact Dynabyte for specific
applications.
4
Figure 2-1 -- 5505' Computer, Front Panel 807129
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5505 Technical Manual 404512
Key
1
2
3
4
Table 2-1 -- 5505 Computer, Front Panel Controls and Indicators
Element
POWER ON OFF
SWitch and Indicator
RESET Switch and
HALT Indicator
Diskette Drive
Diskette Drive
Select Indicator
Function
Applies the ac line to the 5505 Computer and
the ac power receptacle on the rear panel.
Refer to Figure 2-2, Key 3. The indicator
lights When +8 Vdc is available from the power
supply.
Momentarily grounds the S-IOO Reset line
generating a Power On Clear (POC) sequence:
(1)
CPU Program Counter is reset,
(2) Disk Contoller is reset.
When the indicator is lit, the CPU has stopped
at a Z-80 HLT (76H) instruction in the
program.
Provides for reading and writing onto 5.25"
double and single sided floppy Diskettes for
permanent storage of programs and data files.
Lit when Disk Controller selects drive for a
read
or write operation.
2. PHYSICAL DESCRIPTION
2.01 The 5505 Computer is an integrated piece
incorporating all necessary component assemblies.
are:
(1) Power Supply Module
(2)
Central Processing Unit
(CPU)
(3)
S-lOO Bus Card Cage and Motherboard
(4)
Random Access Memory (RAM)
(5) Floppy Disk
Controller
(6 )
Diskette Drive
(7) Hard Disk
Controller
(8) Winchester Hard Disk Drive
Some of the optional assemblies are:
(9) Octaport (an eight-port seria~ I/O).
(10) Additional Random Access Memory (RAM).
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of electronic equipment
The principle assemblies

5505 Technical Manual 404512
Details on these individual assemblies, as well as their schematic diagrams
and
,replaceable parts lists, are funished under separate cover as individual
technical manuals. These assemblies have been enclosed in an exceptionally
compact package measuring 52 em x 47 em x 18 em (20.5 in. x 18.5 in. x 7 in.)
weighing 25 kg (about 55 lbs.).
2.02 The 5505 draws nominally 400 VA of 115 Vac, 60 Hz commercial power. It
may be factory optioned for operation from a 230 Vac, 50 Hz line.
2.03 The 5505 is designed to operate efficiently in an environment with an
ambient
temperature range from 10 to 35 degrees Centrigrade (50 to 95
degrees Farenheit) and with a relative humidity from 20 to 80 percent.
2.04 Figures 2-1 and 2-2 provide number key callouts of all components
located on the front, rear and interior of the 5505. Associated Tables 2-1
through 2-3 provide a cross reference for each callout, identifying the
respective part as to function, description and/or designation.
Front Panel
2.05 Refer to Figure 2-1 for the description Which follows. The 5505
Computer Front Panel has only two operating controls with which the user
should be concerned.
(1) The POWER ON OFF Switch turns the computer on and off. The switch also
connects the ac line power to a convenience receptacle on the rear panel.
The switch also contains an indicator which lights when there is an output
from the internal +8 Vdc power supply.
(2) The RESET Switch is used to restart the computer if it should become
locked up due to a software or hardware malfunction. Operating the RESET
Switch causes the S-IOO Reset Line, Pin 75, to be active low. The Reset
Line is an input to the Power On Clear (POC) circuits and resets the CPU
Program Counter, Disk Controller, etc. Then the CPU initiates a reboot by
jumping
to a starting address appropriate for the user's system. The switch
also contains an indicator, which, when lit, indicates the CPU has read a
Halt (HLT) instruction and has stopped.
The right half of the front panel contains the 5.25 inch diskette storage
unit.
Rear Panel
2.06 Figure 2-2 illustrates the Rear Panel of the 5505 Computer. Table 2-2
tabulates and describes each of the rear panel elements. Ac line and computer
Input Output (I/O) connections are through the rear panel. At the right, the
ac line is connected through an IEC connector. This permits the 5505 to be
connected domestically to 115 Vac, 60 Hz with a National Electrical
Manufacturers Association (NEMA) cord set or internationally with a cord set
appropriate for that country. A line fuse provides protection for the 5505 and
equipment powered from
the ac convenience receptacle above.
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5505 Technical Manual 404512
Key
1
2
3
Figure 2-2 -- 5505 Computer, Rear Panel -802470
Table 2-2 -- 5505 Computer
Rear Panel
Controls and Connectors
Element
Function
Ac Line Receptacle
(J6)
lEe standard three-wire male receptacle.
Provides for ac line, neutral and a third
wire bonded to the chassis frame. Mates with
Belden P-2392 ac cord set for U.S. domestic
use
or the appropriate cord set for the export
country.
Ac Line Fuse (Fl)
Provides ac line overcurrent protection:
(1 ) 115
Vac -- 6 A.
(2) 230 Vac -- 3 A.
Early serial number units are provided with a
circuit breaker in this position.
SWITCHED AC OUTLET
N~ three-wire female receptacle provides for
Receptacle
(J7) .
the ac line, neutral and third wire bonded to
the chassis frame. '!his receptacle is switched
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5505 Technical Manual 404Sl2
4
5
6
7
8
9
10
11
Axial Fan
Dynabyte Identification
Plate
SERIAL 1 PRINTER
Port Receptacle
SERIAL 2 TERMINAL
Port Receptacle
PARALLEL I/O Port
Receptacle
FLOPPY DISK I/O
Receptacle
Hard Disk I/O Access
Hole and
Clamp
I/O Port Connector Area
by
the POWER ON Switch on the front panel -
refer to Figure 2-1, Key 1 - and is protected
by fuse, Key 2, above.
Provides for drawing heat from the power
supply module and internal heat dissipating pc
assemblies.
Furnishes the model and serial number neces-
sary for warranty service. Refer to Figure
6-1.
O8-2S-S connector. Optionally EIA RS-232C or
20 rnA current interface. Connection point for
the EIA cable to the Serial Printer.
D8-2S-S connector. Optionally EIA RS-232C or
20 rnA current interface. Connection point for
the EIA cable to the Video Tenninal.
DB-2S-S connector. Eight-bit parallel I/O
connection point to 2S-conductor cable to a
parallel printer.
SO-conductor ribbon connector. Provides a
connection point for the cable to the
Dynabyte 5010 Dual Diskette Storage.
Furnishes a hole and clamp for the cable to
the Dynabyte S012 Cartridge Module Drive or
SOlI or 5013 Winchester Drive.
Provides positions for O8-2S-S connectors.
Figure 2-2 illustrates connectors for:
(1) Three ports from the CPU
(2) Up to 16 ports from;~p to two
Octaport cards. '<
CAUTION
Power consumption from the ac convenience"
receptacle is limited to 200 V A.
2.07 A four-inch fan draws heat dissipated internally out of the rear
panel. Air is drawn into the 5S05 cabinet through louvers provided in the
bottom of the cabinet.
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