20
3.10 USB Port
The JUKI-745E has one built-in USB port for the future new I/O
bus expansion.
•
JP41:USB Port
PIN NO.
DESCRIPTION
1 VCC
2 USBP0-
3 USBP0+
4 GROUND
3.11 IO Address Map
IO Address Map
I/O Address
Range
DESCRIPTION
000-01F
DMA Controller # 1
020-021
Interrupt Controller # 1, Master
040-05F 8254
timer
060-06F
8042 (Keyboard Controller)
070-07F
Real time Clock, NMI (non-maskable interrupt) Mask
080-09F
DMA Page Register
0A0-0BF
Interrupt Controller # 2
0C0-0DF
DMA Controller # 2
0F0
Clear Math Coprocessor Busy
0F1
Reset Math Coprocessor
0F8-OFF Math
Coprocessor
1F0-1 F8
Fixed Disk
200-207 Game
I/O
278-27F
Parallel Printer Port 2 (LPT3)
2E8-2EF
Serial Port 4
2F8-2FF
Serial Port 2
300-31F Prototype
Card
360-36F Reserved
378-37F
Parallel Printer Port (LPT2)
Содержание JUKI- 745E
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