APPENDIX
9, 1.7
9, 1.8.
9,1,9
9.1. 10
VER.V09F
SECTION 9.1
CHARACTER SETS
Five different sized :True descenders on larger sizes.
charactersets selectable
from Basic.Reverse
video characters
supported for all sets.
MEMORY
Type
Retention
Capacity
Firmware
Upgrading
REAL TIME CLOCK
Type
Accuracy
Integrity
MICROPROCESSOR
Type
Software
Cycle time
:CMOS low power semiconductor RAM.
:Battery support with soldered in Ni/Cd
backup.
:Available in RAM size options of 80k
byte, 144k byte and 208k byte.
Operating system utilises Bk byte of
this memory,
:Built-in operating system including
file manager, Basic interpreter and
disk emulator.
: RAM memory can be upgraded on return
to factory to larger size
:Software accessible time of day and
calendar clock, Totally independant of
microprocessor.
:200ppm worst case, typically 2 sec per
day,
:Non volatile, battery backed,
:NSC800-4
:Executes the Z-80 instruction set
(8080 super set); can run standard
CP/M compatible programs,
:250ns (4MHz)
PAGE9-3
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