| This computer was in use at The Open
University and was acquired for me by a friend John, who
also got a couple of IBM's 5160 & 5170 for me as well
many thanks' John. When I first powered this up I had to
enter the BIOS settings which fortunately for me were
write down on a piece of paper that came with it, since
then I have replaced the BIOS battery which saves that
hassle every time I want to run it. With this I also got
an owners manual and a 4 volume set on MS DOS 3 by
Zenith. This is assembled in an unusual way compared to
modern computers. It has a backplane board screwed to the
base of the case and then the CPU/memory board and all
other I/O boards and expansion memory boards are plugged
into the backplane board. The BIOS battery is fitted to
the backplane board.
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Well this is the system as it stands: Z-200
model ZW-248-84
Taxan 760 EGA monitor 14" colour
Zenith Data Systems Keyboard
Logitech Mouse
O/S DOS 3.21
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The Zenith keyboard is QWERTY layout but
it takes a bit of getting used to as some of the
additional character keys are not where you expect them
to be. Notice the F keys are down the left hand side. It
weighs quite a bit but after dismantling it to clean it
most of the weight is the metal base plate. The
Logitech three button mouse M/N C7DOAB this has a DB-25
female connector which plugs into an SCA/2 card
additional serial port.
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This is a large and heavy unit, it
weighs 49lbs (23Kgs) Dimensions:
Width 21"
Depth 17"
Height 6.25"
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Although it is a large unit there is not
any spare room inside with 2 x 5.25" floppy disk
drives at the bottom right of the picture, underneath
those there are 2 x 5.25" hard drives. At the rear
right is the power supply and on the left are all the I/O
boards, from left to right there are: |
| 1 & 2 |
Emulex Persyst memory board |
| 3 |
SCA/2 additional serial port for mouse DB-25
male |
| 4 |
Paradise Basic EGA board |
| 5 |
I/O board 1 x serial & 1 x parallel port |
| 6 |
CPU/Memory board 85-3261-01E |
| 7 |
Irwin tape drive controller |
| 8 |
Disk controller for floppy & hard drives |
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Here is a size comparison between a 4MB
72 pin SIMM and one of the Emulex memory boards, these
contain 9 rows of 12 chips which are broken down into 2
sets of 6 banks. These boards have been set up as a VDISK Dimensions
of the Emulex board
13.5" (337mm) wide x 4.5"(115mm) high
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