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Address
C0-DE
DMA ch4-7 control
F0-F1
(Coprocessor busy clear/reset)
102
65550 (VGAC) Global Enable Register
110-16F
170-177
Secondary IDE control
180-19F
POS I/O
1A0-1EF
1F0-1F7
Primary IDE control
200-26F
278-27F
[Parallel Port 2 (LPT2) control]
280-2DF
2E8-2EF
COM4 control
2F0-2F7
2F8-2FF
COM2 control
300-36F
378-37F
Parallel Port 1 (LPT1) control
380-38F
398
Super I/O Configuration Port
3A0-3AF
3BC-3BF
[Parallel Port 3 (LPT3) control]
3C0-3DF
EGA/VGA control
3E5
[BIOS ROM Write
Control]
3E8-3EF
COM3 control
3F0-3F7
FD/HD control
3F8-3FF
COM1 control
4-2. POS SPECIFICATION
Address
180-189
Extended Interrupt control
18A
Drawer control
18B-18F
Timer Counter control
190-191
CSIO1 (CKDC) control
192-193
CSIO2 (CKDC) control
194
BIOS Bank control
195
ROM & RAM Disk Base Address
196-197
Interrupt Status Read
198-199
Mask/Flash ROM Bank control
19A-19B
PS-RAM Bank control
19C-19D
Mode Switch
19E-19F
Clerk Switch
580-585
MCR control
588
General Purpose I/O
590-597
COM5 (Serial3) control
598-59F
COM6 (Serial4) control
980-987
Serial5 (Built-in Printer)
988-98F
Serial6 (CU.VFD) control
990-997
erial7 (Touch Panel) control
D80-D8F
[Option]
D90-D9F
[Option]
Standard I/O [Option I/O]
POS I/O
RSVD
RSVD
RSVD
RSVD
RSVD
RSVD
Address
A79
A7A-BFF
C00-CF7
CF8-CFF
D00-D7F
D80-D9F
DA0-FFF
DA0-FFF
5. DMA CHANNEL MAPPING
DMA Channel
o
0
o
1
o
2
3
4
o
5
6
o
7
RSVD
o
o
o
o
o
o
o
UP-5900VS CIRCUIT DESCRIPTION
5 – 4
Legacy ISA I/O
[PnP ISA Auto
Configuration Port]
PCI Configuration
Reserved[POS I/O]
Legacy ISA DMA function
—
—
Floppy Disk Controller
ECP parallel port on LPT1
[Cascade]
—
—
—
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