ALPHA MICROSYSTEMS
AM-740
| 
 Card Type  | 
 Memory  | 
| 
 Maximum Onboard Memory  | 
 128MB  | 
| 
 I/O Options  | 
 Board connector (1)  | 
| 
 Data Bus  | 
 VMEbus  | 
| 
 CONNECTIONS  | |||
| 
 Purpose  | 
 Location  | 
 Purpose  | 
 Location  | 
| 
 Board connector  | 
 CN1  | 
 VMEbus  | 
 CN3  | 
| 
 Parity status LED  | 
 CN2  | 
 VMEbus  | 
 CN4  | 
| 
 DRAM CONFIGURATION  | 
| 
 Note: The size and number of chips are unidentified. This memory board will be factory installed with 4MB, 8MB or 12MB.  | 
| 
 BASE MEMORY SELECTION  | |
| 
 Size  | 
 W8  | 
| 
 None  | 
 1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10, 11 & 12, 13 & 14, 15 & 16  | 
| 
 4MB  | 
 Open  | 
| 
 8MB  | 
 1 & 2  | 
| 
 12MB  | 
 3 & 4  | 
| 
 16MB  | 
 1 & 2, 3 & 4  | 
| 
 20MB  | 
 5 & 6  | 
| 
 24MB  | 
 1 & 2, 5 & 6  | 
| 
 28MB  | 
 3 & 4, 5 & 6  | 
| 
 32MB  | 
 1 & 2, 3 & 4, 5 & 6  | 
| 
 36MB  | 
 7 & 8  | 
| 
 40MB  | 
 1 & 2, 7 & 8  | 
| 
 44MB  | 
 3 & 4, 7 & 8  | 
| 
 48MB  | 
 1 & 2, 3 & 4, 7 & 8  | 
| 
 52MB  | 
 5 & 6, 7 & 8  | 
| 
 56MB  | 
 1 & 2, 5 & 6, 7 & 8  | 
| 
 60MB  | 
 3 & 4, 5 & 6, 7 & 8  | 
| 
 64MB  | 
 1 & 2, 3 & 4, 5 & 6, 7 & 8  | 
| 
 68MB  | 
 9 & 10  | 
| 
 72MB  | 
 1 & 2, 9 & 10  | 
| 
 76MB  | 
 3 & 4, 9 & 10  | 
| 
 80MB  | 
 1 & 2, 3 & 4, 9 & 10  | 
| 
 84MB  | 
 5 & 6, 9 & 10  | 
| 
 88MB  | 
 1 & 2, 5 & 6, 9 & 10  | 
| 
 92MB  | 
 3 & 4, 5 & 6, 9 & 10  | 
| 
 96MB  | 
 1 & 2, 3 & 4, 5 & 6, 9 & 10  | 
| 
 100MB  | 
 7 & 8, 9 & 10  | 
| 
 104MB  | 
 1 & 2, 7 & 8, 9 & 10  | 
| 
 108MB  | 
 3 & 4, 7 & 8, 9 & 10  | 
| 
 112MB  | 
 1 & 2, 3 & 4, 7 & 8, 9 & 10  | 
| 
 116MB  | 
 5 & 6, 7 & 8, 9 & 10  | 
| 
 120MB  | 
 1 & 2, 5 & 6, 7 & 8, 9 & 10  | 
| 
 124MB  | 
 3 & 4, 5 & 6, 7 & 8, 9 & 10  | 
| 
 128MB  | 
 1 & 2, 3 & 4, 5 & 6, 7 & 8, 9 & 10  | 
| 
 Note: If this memory board is used with an AM-175 CPU board (AM-1500 series), W8 must be set as follows: Pins 11 & 12, 13 & 14, 15 & 16 closed. If the AM-1500 is used, only 16MB are available. Any memory above 16MB will be automatically disabled. Before this board can be installed in an AM-1500, a 4MB memory board must be installed. Pins designated should be in the closed position.  | |
| 
 TIMING DETECTION SELECTION  | |
| 
 CPU board used  | 
 W7  | 
| 
 AM-175  | 
 Pins 2 & 4 closed  | 
| 
 AM-180  | 
 Pins 2 & 4 closed  | 
| 
 AM-185  | 
 Open  | 
| 
 AM-185 (50)  | 
 Pins 1 & 3, 2 & 4 closed  |