UCI EasyPC Z-100 Series User manual

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Contents Copyrighted
ucr Corporation
Kent, Ohio
January, 1985
Revision 1

Table of Contents
Page
INTRODU C'l' ION. • • • • • • . • . • • • • • •• • • • • • • • • • • • • • • • •• • • • . • . • •• • • •• 3
CONFIGURATION. • • • • • . • . • • • • • • • • • • • • •• • • . • • • • • •• • • • . • . • . • • • •• 4
5KHz and 8MHz............................................ 4
16 Color Video."""""""""""""""""""""""""""""""""""""""""" 4
Single Dot and Double Dot Video Characters •••••••.•.••••• 4
48TPI and 96TPI
Disk Drives •••••••••.••••••••••••••••.••• 5
IBM Type Monitors ••••••.••••••••••.•.•.•••••••••••••••••• 5
INSTALLATION. • • • • • • • • . • • • • • • • • ••• • •• •• •• . • • • • • • • • • • • • . • • • •• 6
Disassembly of the Z-lOO •.••••••••••••••••••••••••••••••• 7
Cabinet Removal........................................ 7
Low Profile Front Panel Assembly Removal ••••••••••••••• 8
PI op~ Sy stems" " """ """" """" """" "" """ """" """ """ "" " "" "" 9
Winchester Systems."""""""""""""""""""""""""""""""""" 10
All in One Front Panel Assembly Removal •••••••••••••••• 11
PI op~ Systems" """""""""""""""""""""""""""""""""""""" 12
Winchester Systems •••••.•.••••••••••••••••••••••••••• 13
Keyboard and Video Board Removal ••••••••••••••••••••••• 14
EasyPC Installation •••••••••••••••••••••••.•••••••••••••• 16
System Board Installation •••••••••••.•••••••••••••••••• 16
Video Board Installation •••.•.••••••••••••••.•.•••••••• 20
Speaker Installation •••••••.••••••••••••••••.•••••••••• 22
Ploppy Controller Board Installation ••••••••••.•••••••• 23
OPERATION" """"" .. """""""""""" .. """""""""""""""""""""""""""" "" 25
Power Dp and Booting..................................... 25
Pover Up."""""""""""""""""""""""""""""""""""""""""""""" 25
Booting" " " .. """" """ .. " """ .. """"""""" .. "25
Z-lOO Mode ... " .. """" " .. """ .. """ .. " .. " .. " .... "...... " .. """ .. """ .. 25
PC Mode............................................... 26
PloPPY' Booting..................................... 26
Winchester Disk Preparation •••••••••••••••••••••••• 26
MS-DOS 150 Set Up................................ 27
Manual Booting 29
Auto Booting .•..•....•....•......•............. 30
PC-DOS Set Up.................................... 30
Manual Booti ng. •••••••••••••••••••••••••••••• •• 32
Auto Booting................................... 32
COMl, COM2 and Parallel Printer Ports •••••••••••••••••••• 33
Add-on S-IOO
Board Products •••••••••••••••••••••••••••••• 33
Easy PC Command Summary................................... 34
'l'H EORY OF OPERATION........................................ 35
System Board •.•........••..•...•...•..•.••....•.•••...••. 35
Ploppy Controller Board •••.•....•••••.....•••.•.••.•.•... 37
Video Master Board ••.•••••............................... 40
leybo.rd. .......• .... ............... .. •. .. ....•.... •. . . .. 44
FLOPPY DISK CONTROLLER CALIBRATION ••••••••••••••••••••••••• 46
TROOBLESBOOTING.. ••••••••••••••••••••••••••••••••••• .. • • • • • •• 49
APPENDICES. • • • . • . . . . • . . . . . • .. • • . . . . • • • • . • . • • . • . . . • • • . . • . . •• 51
Key code Tabl e. . . . . . . . . . • . . . • . . . . . . . . . . • . . . . . . . • . . . . . . . . .• 51
Specifications •.......•.................................. 54
Block Dia9r aJD.s. . • . . . . . . . . . . • . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 57
Component
Layout......................................... 61
96TPI Disk Drive Set Up •••••••••••••••••••••••••••••••••• 64
EasyPC
Address Map....................................... 65
IBM Type Monitor Set Up 67
DIP
Switch 101 pictorial ••••••••••••••••••••• : ••••••••••• 68
DCI EXPANDABLE RAM Memory Board Configuration •••••••••••• 69
WARRANTY ••.••••.•••••••...•..••...•...•....•.•.•.•••. Inside Cover
1

Figure
Table of Figures
Page
1 Single Dot Video ROM Jumper •••••••••••••••••••••••••• 4
2Z-lOO
Cabinet Removal •.•••••••••••••••••••••••••••••• 7
3
Low Profile Front Panel Assembly Removal ••••••••••••• 8
4
Low Profile Cable Disconnect Floppy Systems Only ••••• 9
5
Low Profile Cable Disconnect Winchester Systems Only. 10
6 All-In-One Front Panel Assembly Removal •••••••••••••• 11
7 All-In-One Cable Disconnect Floppy Systems Only •••••• 12
8 All-In-One Cable Disconnect Winchester Systems Only •• 13
9 Keyboard Shell Removal ••••••••••••••••••••••••••••••• 14
10 Keyboard and Video Board Removal ••••••••••••••••••••• 15
11 IC Locations Z-lOO Motherboard ••••••••••••••••••••••• 17
12 IC Installation Instructions ••••••••••••••••••••••••• 18
13 EasyPC system Board IC Locations ••••••••••••••••••••• 19
14 System and Video Master Board Installation ••••••••••• 21
15 Cable Assembly .......•••...•..••.•.................•. 21
16 Cable and Speaker Installation ••••••••••••••••••••••• 22
17 Floppy Disk Controller Board Installation •••••••••••• 24
18 Keyboard Key Changes for PC Mode...................... 51
19 Floppy Disk Controller Block Diagram ••••••••••••••••• 57
20 Video Master Board Block Diagram ••••••••••••••••••••• 58
21 System Board Block Diagram ••••••••••••••••••••••••••• 59
22 Vectored Interrupts Block Diagram •••••••••••••••••••• 60
23 Video Master Board Component Layout •••••••••••••••••. 61
24 Floppy Disk Controller Board Component Layout •••••••. 62
25 System Board Component Layout •••••••••••••••••••••••• 63
26 96TPI Foil Cut •....••••.••••.•..••...•••••••.•....... 64
27 96TPI Hardware Jumper................................ 64
28 IBM Monitor Foil Cut ••••••••••••••••••••••••••••••••• 67
29 IBM Monitor Hardware Jumper •••••••••••••••••••.••.••• 67
30 DIP Switch 101 Settings ••••••••••••••••••••••••••.••• 68
31 UCI EXPANDABLE RAM Memory Board Foil Cut ••••••.••.••• 69
32 UCI EXPANDABLE RAM Memory Board Jumper ••••••••••••••• 70

INTRODUCTION
The EasyPC gives the Z-lOO user the best of two worlds: all of
the capabilities and features of the Z-lOO and the ability to run
virtually the entire library of PC programs. Features by mode
include:
Z-lOO Mode
- Identical in operation to Z-lOO
-
All Z-lOO software supported
- No degradation in speed or performance
- No additional memory required
PC Mode
- Supports most PC software including copy protected software
- Supports PC color graphics, keyboard, timer, and sound
generation
- Supports Winchester disk operations
- Supports COMl, COM2, and parallel printer ports through
ROM BIOS
-
No additional memory required
The EasyPC ·consi sts of two S-IOO ci rcui t boards and a piggyback
board. Yet its design requires only one extra slot. The
following parts should be included in your EasyPC package.
- 1 System Board
- 1 Video Master Board
- 1 Floppy Disk Controller Board
- 1 Cable Assembly
- 1
Speaker
- 1 Keyboard Overlay
- 1 74LS74 (integrated circuit)
- 1 74S244 (integrated circuit)
- 1 User's Manual
Note: Do not discard the packaging material: the box, foam, or
black conductive bags. If there is ever any reason for you
to ship the product back to UCI, repack it exactly as you
received it. This will guarentee no electrical or physical
damage is done in shipping.
During the installation procedure, you will be required to
partially disassemble your computer before you can install the
EasyPC. Please refer to the installation section of this manual.
3

CONFIGURATION
-----------------------------------------------------------------
The EasyPC can run at 5 or 8 MHz, with single or double dot video
characters, with 48 TPI or 96 TPI floppy disk drives (PC
operating systems do NOT support 96TPI drives.) and with IBM type
monitors. In addition, all 16 video colors are available if
desired. Refer to discussion below to configure the board set to
your particular system.
5 AND 8 MHz Operation
The EasyPC was designed to operate at either the 5 MHz or the
8 MHz speed. Onboard logic automatically adjusts the EasyPC to
the speed of your Z-lOO system. It is not necessary to set
any hardware jumpers on any of the three boards. The EasyPC
will function with both the 5MHz and 8MHz motherboards
manufactured by Zenith as well as any of the speed kits
retroactively installed such as the UCI Speed Up Module. This
includes kits with frequencies under 8 MHz which are popular
in the field.
16 Color Video
The EasypC's Video Master board is capable of producing all 16
IBM color signals. With the standard Zenith Z-lOO cabling,
only 8 colors are possible. For users who desire the full
color range, UCI offers a16 color cable assembly that is
simple to install. For more information contact UCI.
Single or Double Dot Video Characters
The Video ROM on the Video Master Board contains both the
single and double dot video characters. The double dot
characters are recommended for systems with low resolution
composite monitors and the Zenith All-In-One models. For such
systems the double dot characters provide amore legible
screen. The EasyPC is shipped set for the double dot
characters. No change on the Video Master board is required.
For systems with RGB color monitors, the single or double dot
characters can be used. To display the single dot characters
a hardware jumper must be soldered to the Video ROM. To do
so, remove U7 (the only 24 pin IC on the board) from the Video
Master board. Solder a small insulated wire from pin 21 to
pin 12 as shown below. With a small screwdrive extend pin 21.
Reinsert the ROM back into the Video Master board but do not
insert pin 21. The system is now configured for single dot
characters. The procedure can be reversed if you decide to
display the double dot characters again.
4

CONFIGURATION
--------------------------------------------~--------- -----------
1
Figure 1
Single Dot Video Characters ROM Jumper
Disk Drives 48TPI or 96TPI
The EasyPC
Floppy Controller board can support both 48TPI and
96TPI drives. In the PC mode however, the MS-DOS or PC-DOS
operating system can NOT access 96TPI drives. If your system
has 96TPI drives, when operating in the PC mode, data will be
stored on half of the drive. Any disks formatted for 48TPI
drives can not be read on the system.
The Floppy Disk Controller board comes from the factory set up
for 48TPI drives (most disk drives are 48TPI). In order for
it to function with 96TPI drives under the Z-IOO mode, the
board must be jumpered. Please refer to Appendix E for set up
instructions.
Non-Zenith Monitors
If your system does not use one of the Zenith/Heath monitors,
but an IBM or similar monitor, the horizontal and vertical
sync signals on the Video Master board must be inverted before
the EasyPC can function properly. If this is the case with
your Z-lOO system, refer to Appendix G for set up procedures.
5

INSTALLATION
----------------------------------------------------------------
Installation of the EasyPC requires:
1. The disassembly of your Z-lOO system
2. The removal and discard of the Zenith Z207 floppy
disk controller board
3. The swapping of two ICs on the motherboard.
4. The insertion of two 8-100 cards (Video and Floppy
Controllers) and one piggyback System board
5. The installation of speaker and cable assembly
The step by step instructions for both the Low Profile and All-
In-One models are described in the following pages.
Note: Be sure your computer operates properly before you begin
these instructions.
6

INSTALLATION
DISASSEMBLY of the Z-IOO
Cabinet Removal
1. Disconnect all line cords and peripherals to your
computer.
2. Move the metal slides on each side of the computer toward
the back 1/4 inch (see illustration). For the All-In-One
model a flat headed screwdriver is needed.
3. Lift cabinet top off and set it aside.
METAL
/SLIDE
1/4"
CA BI NET
TOP
f~~~~~~---~~ 1/4"
~r METAL
---SLIDE
Figure 2
Z-IOO
Cabinet Removal
7

INSTALLATION
DISASSEMBLY of the Z-lOO
Low Profile Front Panel Assembly Removal
1. For Low Profile models remove the four screws labeled Aand
two locking pins labeled B.
Figure 3
Low Profile Front Panel Assembly Removal
8