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XSIMM10 memory expansion board
XSIMM10 (Ten X-Sim) was manufactured and sold from 1994 by Systems Research Ltd., Tokyo. It is a memory expansion board for the X68000 series. This product uses commercially available SIMM modules (not included) mounted on board, and is compatible with X68000 I/O expansion slots.
Compatible SIMM modules
The XSIMM10 board can be used with the following commercially available SIMM modules:
- PC/AT: 9-bit (with parity) 30-pin
- Macintosh: 8-bit, 30-pin
However, due to the vertical size limitations of I/O expansion slots, there are following SIMM module vertical size restrictions:
- When mounted in slot 1: Less than 15.3mm
- When mounted in slot 2: Less than 20.4mm
If the size is exceeded, the adjacent slot is unusable.
In addition, when used with the following models, you must have a 1MB of internal memory expansion board in advance and a total of 2MB internal memory to add more RAM.
XSIMM10 SIMM modules must have the same access time and memory capacity as a pair or two pairs. The RAM can be expanded up to 10MB maximum.
SIMM modules with 4MB or 1MB capacity can be used as a pair. However, to implement two pairs, do not use 4MB SIMM modules.
- A Pair (Aペア): Each SIMM module can be 4MB or 1MB (You must specify the capacity of installed SIMM modules).
- B Pair (Bペア): Each SIMM module can be only 1MB
DIP switch settings
S1 and S2 DIP switch settings as pictured above.
- 0 = ON
- 1 = OFF
(OFF = 1 is displayed on the board) DIP switch settings as shown below.
DIP switch settings, etc., was taken from the instruction manual XSIMM10 Systems Research Inc., Tokyo.
* The product's manufacturer, Research Systems, Ltd., Tokyo is.