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General Information
Model 743 and Model 744 VME Board Computers
Model 744 Block Diagram
Figure 1-5 illustrates the functional architecture of the Model 744 system board.
Figure 1-5
Model 744 Functional Block Diagram
RTC
CPU
Backplane
Controller
ASIC
I/O
Controller
ASIC
Graphics
Controller
ASIC
Backplane P1 Connector
Backplane P2 Connector
GSC
Connector
Reserved Connector
RAM Stack
Display
RAM
Backplane Bus
GSC Bus
Power
Power
RTC
Battery
RAM Bus
Video
RS–232 B
RS–232 A
Audio
Speaker
Sysfail
LED
Boot/
Run
LED
Parallel
SE SCSI
AUI
LAN
PS/2–0
PS/2–1
Reset/
Abort
Switch
RAM
Card
64–256 MB
Slot 2
RAM
Card
64–256 MB
RAM
Card
64–256 MB
RAM
Card
64–256 MB
Firmware
Controller
EEPROM
REGs
PDC & IODC
SRAM
Cache
(165 MHz only)
Second Level
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