Memory Presence Detect
The presence-detect signals are used by the system to determine the size and speed of memory on the memory module. The pins are either not connected (1) or connected to ground (0).

A set of four bits shows the state of the presence-detect signals for a specific memory connector; a bit is 0 when the signal is connected to ground by the memory module. The following shows the presence-detect encoding for the memory modules supported by the Server 95, well as the corresponding bank size.

Presence Detect Signals
PRESENCE DETECT
3 2 1 0 
ECC/
PARITY
MEMORY MODULE 
DEFINITION
BANK SIZE
1 1 0 0
1
2MB 70-ns parity memory
1MB
0 1 0 0
1
4MB 70-ns parity memory
4MB
1 0 1 1
1
8MB 70-ns parity memory
4MB
1 0 0 1
0
4MB 70-ns ECC memory
1MB
1 0 1 1
0
8MB 70-ns ECC memory
4MB
0 0 1 1
0
16MB 70-ns ECC memory
4MB
1 0 1 0
0
32MB 70-ns ECC memory
4MB

Memory Main Page

9595 Main Page
p;    +-------------------------   ---   ---------+ 
                        |       # # # # # # # # #..   #  .. # # #   | 
                        |       # # # # # # # # #     #     # # #   | 
                        |                                           | 
                        |       7 7 7 6 6 6 6 6 6     4     0 0 0   +-+ 
                        |       2 1 0 9 8 7 6 5 4     8     3 2 1     | 

Geek Speak
  I am a college gradidiot. So for all of us common sense deprived individuals
PD Bit    0    1    2    3
Resistor  R1   R2   R3   R4
SIMM Pin  67   68   69   70
 
 

Memory Main Page

9595 Main Page