DATAMAN S4 MANUAL
SUM KEY (green)<$&SUM> 51
ENTER key. A mismatch between PROM and
USER-RAM is displayed RAM
ADDRESS, RAM BYTE, ROM BYTE as follows:
@COMPUTER TEXT = 001B6 RAM=AA
ROM=FF<R>
<R>
<R>
<$IKEY;SUM>
SUM KEY (green)<$&SUM>
@COMPUTER TEXT = >><R>
>><R>
>>CHKSUM 27256<R>
SUM = 01234567
<$IPROM;Checksum without
loading><$IChecksum;PROM without
loading>The
green SUM key operates on the PROM in the ZIF
socket. It performs
a checksum on all the locations of a ROM in the
ZIF socket. The CHECKSUM
ROM function allows the user to take the
checksum of a ROM device
without first loading it into RAM, thus avoiding
over-writing USER
MEMORY.
The PROM TYPE as specified in CONFIG is
displayed.
The CHECKSUM is presented the answer as a
eight digit hex number.
A CHECKSUM provides a "signature" for
identifying and labelling programmed
PROMS. Master PROMS should be labelled with
their CHECKSUM to ensure
that they have not been over-programmed by
mistake - and neither gained
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