FujiFilm CR-IR341 Service Manual page 100

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C
ONTENTS
7.10 Function of Each Board
The functions and block diagrams of standard and optional boards connected within the rack
are described.
CPU90E Board
The 68EN360 (25 MHz), available from Motorola, is used as a CPU, with 16 MB of DRAM as
main memory, 1 MB of EPPROM and FEPROM, and 128 KB of SRAM.
The SRAM contents, as well as the date and time, are backed up by a battery (lithium ion
cell).
A µPD72070 floppy disk controller (FDC) is used to control the floppy disk drive (FDD).
The 128KB SRAM contains gamma correction values.
In addition, the CRT controller supports a VGA monochrome monitor.
With VRAM (4M bits, x3), an image plane is displayed with 640 x 480 pixels (12 bits), while a
text plane is displayed with 640 x 480 pixels (4 bits).
When an image is displayed on the CR-IR341's monitor, gamma correction is performed.
Thus, in order to achieve gamma correction quickly, the monitor screen goes blank, and an
image is then displayed after gamma correction.
009-051-04
05.31.99 FM2460
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CR-IR341 Service Manual
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