morse KP 286, User Manual

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HARDWARE INSTALLATION
II-3.3.6 Mono (Color) Fine Tuning (VC1)
This variable capacitor is used to adjust the color of video mode by deliver­
ing the correct frequency to the color display card. The user may use a screw
driver to tune the displayed colors with the VC1.
II-3.3.7
PROM
Type Select
(DSW1-SW5)
DSW1-SW5 Setting PROM Type Installed
On 27128
Off 27256
II-3.3.8 Keylock Function (JP20)
Note: a) Connector JP20 has two functions: the keyboard inhibited (Pin 4 &
Pin 5) and power on LED indicator (Pin 1 & Pin 3), usually connected
to the front panel by wires.
b) Insert key and turn the keyboard switch to control the keyboard inhibit
function.
Jumper (JP2O) Set Function
Pin 4
&
Pin 5
Close Keyboard inhibit
Open Keyboard functioning
II-3.3.9 Setting the On Board RAM Bank and Memory
Partition (DSW1-SW6,7,8)
KP 286 12MHz system board was designed to support on board memory
of up to 4M bytes, with 512K, 640K, IM, 2M or 4M bytes installed in the
dual-purpose 34-pin sockets. The RAM bank can be partitioned into various
configurations. These are 512/0, 640/0, 640/384, 640/EMS384, 640/1048,
640/EMD1048, 640/3456, 640/EMS3456. It supports DOS Conventional
memory, Expanded (EMS) memory, and Extended (running in protected mode)
memory functions.
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