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SS10 memory slots

501-1733 — SPARCstation 10 motherboard Ut to two Mbus modules. 16.6/20MHz (model 20) or 18/20MHz SBus.

SPARCstation 10 motherboards come in three fab versions. 270-1733-12 and 270-1733-13 (501-1733/2259/2274), and 270-1733-14 (501-2365), each with minor layout differences from the others. Additionally, the 501-2274 part for the model 20 is clocked at a different speed.

From left to right, the rear edge of the board has: ISDN NT and TE connectors; a parallel/audio/AUI Ethernet connector; a keyboard connector; a serial port connector (ports A and B in the same connector); a 10BaseT Ethernet connector; and a 50-pin SCSI-2 connector.

Connector pinouts and form factors are not known.

Memory is in the form of up to eight 16M (501-1785 or 501-2273) or 64M (501-1930) 70ns SIMMs. The must be installed in the order shown:

Nearest SBus connectors                                    |   |
                                                           | K |
  J201 ------------------------ (1) 0x00000000-0x03FFFFFF  |   |
  J202 ------------------------ (8) 0x10000000-0x13FFFFFF  | R |
  J203 ------------------------ (3) 0x04000000-0x07FFFFFF  |   |
  J301 ------------------------ (6) 0x14000000-0x17FFFFFF  | A |
  J302 ------------------------ (4) 0x08000000-0x0BFFFFFF  |   |
  J303 ------------------------ (5) 0x18000000-0x1BFFFFFF  | G |
  J304 ------------------------ (2) 0x0C000000-0x0FFFFFFF  |   |
  J305 ------------------------ (7) 0x1C000000-0x1FFFFFFF  +---+
  
 +---------------------+
 |       D I S K       |
 +---------------------+

The numbers in parenthesis is the order in which to insert the units.