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4. PRE-sTART u p PROCEDURES
/MELSEC
4
(1) RAM
is
built into the unit, there is no need to load RAM
into either socket.
(2) The correct direction of the "blip" on the ROM is indi-
cated on the ROM socket.
(3) ROM may be loaded into either socket and ROM sizes
(27128, 27256) may be mixed providing the address
ranges are noted.
(4) When ROM i s installed some RAM address ranges change.
(For details, refer t o Section 3.5 (page 3-13).
(5) Cover the EPROM window after i t has been programmed.
(6) Ensure that ROMs are correctly stored and protected.
(7) Keep the ROM away from static electricity
-
use anti-
static foam where possible.
(8) The shorting pin is factory-set to RAM (RAM.A and
RAM.B connectors).
(9) Channel 1 shorting pins are marked RAM.A and channel
2, RAM.B.
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