ENDAT-GX201 USER’S MANUAL
UNICORN COMPUTER CORP.
31
2-8. PC104
z
There have 4 items in “Integrated Peripherals” menu of
BIOS need to defined for PC104
1.
IT8888 ISA Decode IO
There have 5 sets (4..0) of decode addresses available in this item:
a). Decode I/O Space [4..0]:
Enabled / Disabled
This item needs to set as “Enabled” to change the setting of below (from b to d).
b). Decode I/O Speed [4..0]:
Subtractive Speed / Slow Speed / Medium Speed / Fast Speed.
Set decode speed as needs, generally is “Fast Speed”.
c). Decode I/O Addr. [4..0] [15:4]:
0001 to 0fff (HEX number).
Set decodes address according to the interface need.
d). Decode I/O Size [4..0]:
1 / 2 / 4 / 8 / 16 / 32 / 64 /128 Bytes
Set how many size will be used on the interface.
2.
IT8888 ISA Decode Memory
There have 4 sets (3..0) of decode addresses available in this item:
a). Decode Memory Space [3..0]:
Enabled / Disabled
This item needs to set as “Enabled” to change the setting of below (b to d).
b). Decode Memory Speed [3..0]:
Subtractive Speed/Slow Speed/Medium Speed/Fast Speed.
Set decodes speed as needs.
c). Decode Momory Addr. [3..0] [23:12]:
0000 to 0fff (HEX number).
Set decodes address according to the interface need.
d). Decode Momory Size [3..0]:
16K/32K/64K/128K/256K/512K/1M/2M Bytes
Set how many size will be used on the interface.
3. IT8888
DDMA
There have 6 DMA channels available on this item (
0/1/2/3/5/6/7
), please set one or more DMA channel
as interface needs.
ENDAT-GX201 USER’S MANUAL
UNICORN COMPUTER CORP.
32
4. IRQ
Resources
Please set the item “
Resources Controlled By” as “
Manual
” from “
Auto (ESCD)
”, then reserved one or
more interrupt number for interface usage. Available number is:
3/4/5/7/10/11/14/15
.
z
Example operation (RS-232 card):
Step 1:
Setting the IO card jumper to assign the IO port address and IRQ number.
In this case, the port address of jumpers was been set as “3F8/IRQ4 (COM1)” and “2F8/IRQ3 (COM2)”.
Step 2:
Press “Del” key to get in the BIOS utility and disable all onboard COM ports, then select the
“Integrated Peripherals” to set the decode address for RS-232 card. In the ”IT8888 ISA Decode IO”,
change these 5 items as follows:
a). Decode I/O Space 0 / 1: Enable.
b). Decode I/O Speed 0 / 1: Fast Speed.
c). Decode I/O Addr. 0 / 1: 03f (COM1) / 02f (COM2).
d). Decode I/O Size 0 / 1: 16 Bytes.
e). Change the item
“
Resources Controlled By” as “Manual” from “Auto (ESCD)” and change the number
3 and 4 of interrupt as “Legacy ISA” from “PCI/ISA PnP”.
Step 3:
Plug the RS-232 card in M/B and turn on the power, the COM1 and COM2 of RS-232 card
should be found in “System configuration table”. Then, continue boot up to WINDOWS system and
connect MODEM or other COM port devices to verify function.
