Differences

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--- x68000:xsimm10ss_-_memory_expansion_board [2020/08/08 18:13] – [Manual Scans] megatron-uk
+++ x68000:xsimm10ss_-_memory_expansion_board [2020/08/08 18:26] – [Configuration Options] megatron-uk
@@ Line 5: / Line 5: @@
 Unfortunately, information on the later XSIMM10ss is rather thin on the ground - which is a shame as it has the most flexibility of all the models:
-   * A pair of 30pin, 16bit SIMM sockets
+   * Two independent 72pin SIMM sockets (Slots A and B)
-   * Two independent 32bit, 72pin SIMM sockets
+   * A pair of 30pin SIMM sockets (Slot C)
 {{:x68000:img_1200.jpg?400|}}
@@ Line 21: / Line 22: @@
 ==== Configuration Options ====
+Because the manual is difficult to make out, I have transcribed all of the configuration options into the table below.
 //Note: 'Memory Size' in the below table refers to the expansion memory size, not the entire system memory size.//
@@ Line 77: / Line 80: @@
 | 1111         | 1010         | 1MBit        | 4MB    | -      | 2x 1MB | 6       | 6MB         |
 | 1111         | 1011         | 1MBit        | 4MB    | 4MB    | 2x 1MB | 2       | 10MB        |
+You can see a few restrictions on the options:
+   * If using any 72pin SIMMS, you must have Slot A filled first
+   * 30pin SIMMS must always be fitted in pairs
+   * You //can// use the following combinations:
+     * Slot A
+     * Slot C
+     * Slot A and Slot B
+     * Slot A and Slot C
+     * Slot A and Slot B and Slot C (but note that there are only 2 supported configurations in that mode)
+   * You //cannot// use the following combinations:
+     * Slot B
+     * Slot B and Slot C
 There are a couple of variations of the same sizes - they are: