Gilderfluke&Co 16 Bit CD-Quality Digital Audio Systems - Manual (Page 83)

- MX-1000 M EMORY E XPANSION B OARDS -
FOR USE WITH
AB/DR-3000 D
IGITAL
A
UDIO
R
EPEATERS
A MX-1000 Memory Expansion Board is used to increase the capacity of a AB/DR-3000 by thirty-two
additional memory chips. Up to fifteen of these memory expansion cards can be used on any AB/DR-
3000 within the physical space limitations of the AB/DR-3000 housing. The practical limits are two MX-
1000's in an AB-3000 AudioBrick case
32 , and seven MX-1000Õs on a DR-3000. This gives a capacity of up
to seventy-six Eproms on an AB-3000 AudioBrick, or 236 Eproms on a card cage mounted DR-3000.
The MX-1000 expansion cards, like the AB/DR-3000s they work with, support Eproms from 27C040
(512 KBytes x 8) up to 27C080 (1024 KBytes x 8). A red LED on each MX-1000 shows when the memory
chips on that card are being accessed. All the EPROM sockets on the AB/DR-3000 must be filled before
adding more chips by using a MX-1000. The Eproms on the MX-1000 are installed starting with the sock-
et marked as 'ROM 1' and extending through the socket marked 'ROM 32'. Since these AB/DR-3000s are
sixteen bit devices, memory chips must always be used in pairs. There can be no breaks in the EPROM
sequence, and the MX-1000 must be completely filled if additional MX- cards are going to be used.
WHEN INSTALLING Eproms, BE SURE TO OBSERVE THE 'PIN ONE' MARK-
INGS ON THE Eproms, SOCKETS, AND PRINTED CIRCUIT BOARDS. PLUG-
GING AN EPROM IN BACKWARDS CAN DAMAGE BOTH THE EPROM AND RE-
PEATER!
When using memory expansion cards in card cage mounted systems, DR-3000 fronts in special 2"
wide size are available. These can be ordered as needed under part number RF-2000.
G ILDERFLUKE & C O . ¥ 205 S OUTH F LOWER S T . ¥ B URBANK , C ALIF . 91502-2102 ¥ 818/840-9484 ¥ FAX 818/840-9485
75 of 92
32 Up to 15 MX-1000s can be added to an AB-3000 if you leave the lid off the top of the case.