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5-10 Hardware Specifications Rev.A
Confidential
Peripheral I/O Circuits
(*) The POS K/B controller is located on the MSR board in the optional MSR module.
5-6 Block chart of peripheral I/O circuits
Super I/O (FDC37B807)
Two SMSC FDC37B807 are used to control the FDD, keyboard/ mouse, parallel (1 port) and
serial (4 ports). As shown in the block chart of peripheral I/O circuits (page 5-12), one of the
SMSC FDC37B807 controls FDD, Keyboard/Mouse, parallel and serial 2 ports, and the other one
controls serial 2 ports.
The COM1, COM2 serial ports are used as an external I/F. COM3 can be used as an external I/F
when it is not connected to the DRW/ external TM/DM-D, although COM3 is allocated for
DRW/ external TM/DM-D.
IDE device
It is possible to mount 2.5-inch HDD or CompactFlash card on standard primary IDE device and
CD-ROM and CompactFalsh card on secondary IDE device.
82371EB
(PIIX4E)
USB
CD-ROM
Primary IDE
PCI Bus
FDC37B807
(A)
2.5”
HDD
CF
Or
Secondary IDE
FDD KB/Mouse LPT COM1 COM2
COM3
(Exclusive
DRW/TM/DM-D)
COM4
(Touch panel)
FDC37B807
(B)
ISA Bus
RTC
82C54
82C59
82C37
USB
BIOS
ROM
D/R
D/R:
Driver/Receiver
D/R
DM-LR121X
Mdl
POS K/B
Controller
CF
Or
COM3
D/R
SEL
*Selection by BIOS
Setup