Compaq 386 manual Bank 3 Enabled, Bank 3 Disabled

Maintenance and Service Guide 8-11

Bank 3 Enabled

When pin 1 to pin 2 is jumpered, Bank 3 (socketed memory) is accessed normally by the system. If memory is not installed in Bank 1 and the jumper is set in this position, parity errors occur.

Bank 3 Disabled

When pin 2 to 3 is jumpered, Bank 3 (socketed memory) is disabled. This position should be used when memory is not installed in Bank 1.

Figure 8-6.Jumper 101 Setting on the 1- to 2-Megabyte (assy. no. 000450) or 4- to 8-Megabyte (assy. no. 000459)

32-Bit Memory Expansion Board.

Table 8-8. Jumper Settings tor the 1- to 2-Megabyte or 4- to 8-Megabyte 32-Bit Memory Expansion Boards

	1- to 2-Megabyte 32-Bit	4- to 8-Megabyte 32-Bit
J101 Setting	Memory Expansion Board	Memory Expansion Board
1 to 2	Enables second 1 MB of memory	Enables second 4 MB of memory
2 to 3 (default)	Disables second 1 MB of memory	Disables second 4 MB of memory