Gilderfluke&Co 8 Bit Digital Audio Systems User Manual
Page 59
- MX-100 / MX-200 -
- Memory Expansion Boards -
for use with AB-100
Digital Audio Repeaters
A MX-100 or MX-200 Memory Expansion Board is used to increase the
capacity of a Digital Audio Repeater by thirty-two additional memory chips.
Any number of these memory expansion cards can be used on any
Repeater card within the physical space limitations of the Repeater hous-
ing. The practical limits are three MX-100's in an AB-100 AudioBrick case.
This gives a capacity of up to 112 Eproms on an AB-100 AudioBrick or AB-
Clock.
The MX- expansion cards, like the Repeaters they work with, support
Eproms from 27C512 (64 KBytes x 8) up to 27C080 (1024 KBytes x 8). A red
LED on each MX- card shows when the memory chips on that card are ac-
tive. All Eprom sockets in the Repeater card with which the MX- is used with
must be filled. The Eproms on the MX- card are installed starting with the
socket marked as 'ROM 1' and extending through the socket marked 'ROM
32'. There can be no breaks in the Eprom sequence, and the MX- card
must be completely filled if additional MX- cards are going to be used.
WHEN INSTALLING Eproms, BE SURE TO OBSERVE THE 'PIN
ONE' MARKINGS ON THE Eproms, SOCKETS, AND PRINTED CIR-
CUIT BOARDS. PLUGGING AN Eprom IN BACKWARDS CAN
DAMAGE BOTH THE Eprom AND REPEATER!
The only difference between the MX-100 and the MX-200 are the height
above the board the Eproms take. The MX-100 is the standard card. The
Eproms are mounted in standard-style Eprom sockets and the cards can be
used in any memory expansion card position. The MX-200 cards use special
low profile Eprom sockets. They are used when there isn't room to mount a
normal MX-100 card. MX-200 cards can only be used as the last or only
card in a stack of memory cards. They don't have connectors on their top to
allow additional MX- cards to be stacked on their tops.
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ILDERFLUKE
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