![Sharp UP-5900 Service Manual Download Page 34](http://html.mh-extra.com/html/sharp/up-5900/up-5900_service-manual_373333034.webp)
UP-5900VS
CIRCUIT DESCRIPTION
5 – 4
4-2. POS SPECIFICATION
5. DMA CHANNEL MAPPING
C0-DE
DMA ch4-7 control
A79
[PnP ISA Auto
Configuration Port]
F0-F1
(Coprocessor busy clear/reset)
A7A-BFF
102
65550 (VGAC) Global Enable Register
C00-CF7
CF8-CFF
PCI Configuration
110-16F
D00-D7F
170-177
Secondary IDE control
D80-D9F
Reserved[POS I/O]
180-19F
POS I/O
DA0-FFF
1A0-1EF
DA0-FFF
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
Address
Standard I/O [Option I/O]
Address
Legacy ISA I/O
Address
POS I/O
180-189
Extended Interrupt control
o
18A
Drawer control
o
18B-18F
Timer Counter control
o
190-191
CSIO1 (CKDC) control
RSVD
192-193
CSIO2 (CKDC) control
RSVD
194
BIOS Bank control
o
195
ROM & RAM Disk Base Address
RSVD
196-197
Interrupt Status Read
o
198-199
Mask/Flash ROM Bank control
RSVD
19A-19B
PS-RAM Bank control
RSVD
19C-19D
Mode Switch
RSVD
19E-19F
Clerk Switch
o
580-585
MCR control
o
588
General Purpose I/O
o
590-597
COM5 (Serial3) control
o
598-59F
COM6 (Serial4) control
RSVD
980-987
Serial5 (Built-in Printer)
o
988-98F
Serial6 (CU.VFD) control
o
990-997
erial7 (Touch Panel) control
o
D80-D8F
[Option]
D90-D9F
[Option]
DMA Channel
Legacy ISA DMA function
0
—
1
—
2
Floppy Disk Controller
3
ECP parallel port on LPT1
4
[Cascade]
5
—
6
—
7
—