Tektronix 8001A Installation Manual page 42

Program Memory/8002 System Memory Module
5-4
Table 5-3
Program Memory Byte/Word Mode Jumpers
Jumper Byte Memory Word Memory
J9 deleted installed
J10 installed deleted
9900 WORD MODE HARDWARE MODIFICATION
This hardware modification is only to be performed on memory boards converted to word
mode for use with the 9900 emulator processor. Once the boards have been modified, byte
oriented processors can continue to be used provided both boards are used together. In
this case the modified boards will be accessed by reading each one alternately.
Modification Procedure:
1. Cut runs to pins 1 and 2 of U5150
2. Cut run to pin 12 of U4170
3. Cut jumper J 10 (located between U5150 and U5160)
4. Connect jumper between pins 2 and 4 of U5150
5. Connect jumper between pin 1 of U5150 and pin P 1-80
6. Connect jumper between pin 3 of U5150 and pin 12 of U4170
7. Connect a 560 ohm resistor (Tek P/N 315-0561-00) between pins 3 and 14 of U5150
See Fig. 5-2 for location of runs.
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8001/8002 Installation Guide