Specifications

C.5 SMIM—Shuttle Matrix Imaging Microprocessor
The SMIM board (P/N 29-26730-00) sends command signals to the SMIH
board, building dot rows to form font characters and sixel displays. The
SMIM board also controls ribbon and paper movement.
Four ROM chip locations (U23, U24, U38, U39) constitute the location
of the resident font.
The SMIM board (see Figure C-4) is located in the card cage.
Fuses: None
Controls: None
Indicators: CR3 (LED)—Indicates the microprocessor (8088) is running
Jumpers: J1 - Factory set (wire jumper) for battery backup
J3, J5, J7, J9, J11, J13, J15, J17, J18, J20, J22, J24, and J27
must be IN. J2 must be removed.
The setting of the other jumpers is not relevant.
C–6 LG31 PRINTED CIRCUIT BOARD SUMMARY