IBM Personal System/2 60 - Page 41

System Board Memory Connector
The system board has four 30-pin connectors and comes with four
256KB memory module packages installed. The following figure
shows the pin assignments and signal definitions for these
ne cur
connectors.
Pin vo Signal Pin vo Signal
1 N/A +5Vde Vv 2 ! -Column Address
Strobe ¥v
3 V0 Data Bit 1 DS 4 I Address Bit 1 A&
5 l Address Bit 2 A‘ 6 vo Data Bit 2 DL
7 I Address Bit3 Az 8 I Address Bit 4 AS
9 N/A Ground VS 10 0 Data Bit 3 pr
11 ! Address Bit5 A4 12 ! Address Bit 6 4°
13 vo Data Bit 4 bE 14 | Address Bit 7 Aé
15 ! Address Bit8 A? 16 VO Data Bit 5 DY
17 ! Address Bit9 AZ 18 N/A No Connection A4
19 j Reserved fro 20 1/0 Data Bit 6 be
21 I -Write Strobe w& 22 N/A Ground 4
23 VO Data Bit 7 DE 24 ° Presence Detect “<
25 vO Data Bit 8 b> 26 ° Presence Detect L47 4
27 ! Reserved RAS 28 N/A No Connection ~cASe
29 Vo Data Bit 9 (Parity) DY’ ‘Vv 30 N/A +5Vde v
Figure 3-5. System Board Memory Connector
Model 60 System Board — October 1990 3-9