參數(shù)資料
型號(hào)： PCSYSCON
英文描述： PC(ISA)BUS I/O CARD
中文描述： 電腦（ISA）總線的I / O卡
文件頁(yè)數(shù)： 17/36頁(yè)
文件大?。?/td> 383K
代理商： PCSYSCON
Links
There are two functions defined by links on the PCSYSCON: where
the interrupts go to on the PC and what the normal relay state is.The
links are defined by pushing little blue jumpers onto pairs of pins.
Link 1. Where the interrupts go to on the PC
This is a group of six pins just above the PCbus connector. The
jumper must be inserted vertically, which means that there are four
possible situations, A, B, C and no jumper inserted.
LK1A sends the interrupt to PCbus IRQ2.
LK1B sends the interrupt to PCbus IRQ3.
LK1C sends the interrupt to PCbus -IOCHCHK.
(Note that this is normally intended to generate a non-maskable
interrupt, and may well halt the PC.)
No jumper means that the PCSYSCON cannot generate any
interrupts.
If you intend to use the Arcom driver software it may be necessary
to insert a jumper into one of these link positions. See the section on
driver software.
Interrupts can only be generated if the mask register INTM is
appropriately enabled.
We recommend that you do not insert a jumper into LK1. Change
this if you intend to use interrupts and are experienced at writing PC
interrupt-handling software, or possibly if you are using the Arcom
drivers.
Default Link Position
2192-09065-000-000
Section 3. Using the PCSYSCON
Page 17
J278 PCSYSCON
A B C
LK1
LK2
B
A
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