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Front panel connectors
J1 is the reset connector
J2 is the turbo speed selection (1-2 for slow, 2-3 for keyboard-controlled, OFF for turbo)
J3 is the speaker
J4 is the Turbo LED
J5 is the keylock/power LED
cache size J6-J8
1-2 64k cache (default)
2-3 256k cache
wait states J9
ON - zero wait-state (default)
OFF - one wait-state
CPU type J10-J12
| CPU | J10 | J11 | J12 |
|---|---|---|---|
| 486DX (default) | ON | 1-2 | 1-2 |
| 486SX | OFF | 2-3 | OFF |
| 487SX | ON | 1-2 | 2-3 |
video selection J13
1-2 monochrome (default)
2-3 color
CPU speed selection J14
1-2 for 33MHz CPU (default)
2-3 for 16/20/25MHz CPU
Note: ensure 66/32/40/50MHz OSC is installed
SIMM memory configuration:
| Total memory | bank 0 | bank 1 |
|---|---|---|
| 1Mb | 4x256Kb | |
| 2Mb | 4x256Kb | 4x256Kb |
| 4Mb | 4x1Mb | |
| 5Mb | 4x256Kb | 4x1Mb |
| 5Mb | 4x1Mb | 4x256Kb |
| 8Mb | 4x1Mb | 4x1Mb |
| 16Mb | 4x4Mb | |
| 17Mb | 4x256Kb | 4x4Mb |
| 17Mb | 4x4Mb | 4x256Kb |
| 20Mb | 4x1Mb | 4x4Mb |
| 20Mb | 4x4Mb | 4x1Mb |
| 32Mb | 4x4Mb | 4x4Mb |
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