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that means your EPROM not be written. as you need,
please turn off the switch and change a new good
EPROM and do again until you get a fully programmed
EPROM.
2) READ: To instal the EPROM into the TEXTOOL and type 2,
the follows will come to the screen:
START ADDRESS ? $
Also please key in a start address of memory in hex
code. Where wish to reed in from EPROMs. and hit
RETURN. After one second, Read function finished:
READ (Show on the screen)
1) WRITE
2) READ
3) COPY
4) COMPARE
5) BLANKCHECK
6) MONITOR
Now you may key in 4 or 6 to check what you READ
from EPROMs according the next procedures we will
explained later.
3) COPY: To key in “3” means you Want to burn a new copy
EPROM from a old master ROM. You will see the follows
from the screen:
SET EASTER ROM
Please do it carefully, and hit RETURN
READ
SET BLANK ROM
Please take the master ROM away and put a blank EPROM
in the textool, press RETURN:
BLANK ? (Y/N)
The next procedure is same as WRITE until you get a
new copy EPROM.
4) COMPARE: To compare a block of memory and the master EPROM.
Only to hit “4” for compare function, the following
come to the screen:
START ADDRESS ? $
Please key in start address of memory location in
where you want to compare with the master EPROM