ENSONIQ ASR-10 Service Manual

SIMM Information
What Changed?
The newer board can accept 2 chip and 8 chip memory parts. The older board can only use the 8 chip
parts. Since the 2 chip parts are becoming more common (and possibly less expensive) we redesigned
the board to allow you to use them.
How to Tell Which Rev Board You Have
The old rev board looks like this:
Jumper is connected for
STANDARD SIMM Memory.
Move to the other pins when
using Expansion SIMM Slots.
Two 1-MegaByte SlMMs
Expansion slots are empty
Note the single jumper above the SIMM slots.
The new rev board looks like this:
SIMM Size Jumpers (2)
are set to 1M (1 MegaB
SIMMS). Move the
jumpers to the 4M
positions when changing
to 4 MegaByie SIMMS.
Jumper is connected for
STANDARD SIMM Memory.
Move to the other pins when
using expansion SIMM slots.
Two 1 MegaByte SlMMs
Expansion slots are empty
Note the two d@erent jumpers above the SIMM slots.
Figure 28 - Board differences
Purchasing SlMMs For Your Customer
Here is some important information you should know about purchasing the proper SIMMs, and
questions you should ask when ordering SIMMs:
How many pins?
The ASR was designed to use 30-pin SIMMs.
What parity type?
lm x 8 or 4m x 8 (Macintosh) non-parity SIMMs (not lm x 9 or 4m x 9 parity SIMMs). These are the
only type of SIMMs that will work with the ASR. Do not use parity SIMMs (designed for IBM PC
compatibles). They will not operate properly, and may damage the ASR.
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ASR Service Manual

ENSONIQ ASR-10 Specifications

General

Brand	ENSONIQ
Model	ASR-10
Category	Recording Equipment
Language	English