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The rear panel has several connectors (Fig. 1-3) for Disk Drives, Video
Monitor, Cassette Recorder and Joy stick.
required to make a functional computer. It also has 5 extention slots compatible
with Apple II peripherals. These slots are numbered #1,
#3,
#4, #5
and #7.
The chassis contains the computerboard and power supply. Open the cover
of chassis. and you will see the power supply on the
ri~t
side above the computer·
board. The power supply is a high frequency switching mode and proYides four
DC Voltages: +5V, +12V, -5V, -12V. The source of power can be either 110V
AC or 220V AC, switch selectable (FIG. 1-4). The output of power supply connects
to the computerboard via a G-pin connector. The connector pinout is shown in
Fig.ne 1-5.
FIG. 1-4
,...-------------------_.----------------------_
~
1
GND
+12V
-5V
-12V
+5V
+5V:
,
,
~
-
----- -- .----- ---------- -------- --
-.
-_._~
GAME TAPE
TAPE
I/O
OUT
IN
.[][].
220V 110V
VIDEO
DRIVE
1
::[J]
DRIVE
2
FIG,1-6 Computerboard
VIDEO DISPLAY:
Display type:
Memory mapped display
Displaymode:
Text, Low-resolution Graphics, High.Resolution Graphics.
Text capacity:
960 characters (24 lines, 40 columns)
Character type:
5x7 dot matrix
Character_set:
Upper/Lower case ASCII
Character modes: Nonnal, Inverse, Flashing
Graphics capacity: 1920 blocks (Low-Resolution) in a 40 by 4S array.
53760 dots (High·Resolution) in a 2S0 by 192 array.
FIG. 1-5 Power Pinout
COMPUTERBOARD:
The U·2200 is a single board computer. The computerboard (Fig. 1-6)
includes the 6502 and Z·80 microprocessors, RAM (Random Access Memory),
ROM (Read only Memory). IC's (Integrated Circuits) and other components
2
In the center of rear side of the computerboard there is a metal connector
marked "VIDEO". This connector allows you to attach a -rable between the U.2200
and a closed-<:ircuit video monitor. It is a female RCA phono jack. On the right
rear conner, there is a 4·pin.connector (ie. auxiliary video connector) for an RF
"?odulator that can connect to either TV set or video mointor. The U-2200 has
Video soft-switch functions.
If
you have an SO-<:olumn card plugged in slot
#3,
you can plug the output of an SO-<:olumn video into a 2-pin Connector marked
"SO-<:ol input" giving you automatic video switching.
3
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