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Jumper Configurations
Table A-1
Jumper Descriptions (continued).
JUMPER #
DESCRIPTION
W4(A,B)
Installing W4A ties the STD bus pin
INTRQ1* (previously RESERVED) to the
interrupt request 1 (IR1) on the interrupt
controller, as opposed to installing W4B,
which ties the frontplane interrupt request 1
(FP1*) to IR1. Factory default installs W4A
for STD DOS and STD ROM systems.
W4A
W4B
Function
IN †
OUT
INTRQ1* (previously RESERVED)
STD bus signal drives IR1
OUT
IN
FP1* frontplane signal drives IR1
W5(A,B)
Install W5A when using the 8087 plug-in
module (zSBC 337) to bring the 8087 inter-
rupt request to interrupt request 0 (IR0) on
the interrupt controller. Install W5B for STD
DOS systems to bring the output of timer 0
to IR0 on the interrupt controller. Factory
default installs W5B.
W5A
W5B
Function
IN
OUT
8087 interrupt request drives IR0
OUT
IN †
Timer 0 output drives IR0
A-5
Содержание ZT 8809A
Страница 15: ...Tables Table B 9 J5 Pin Assignments B 17 Table B 10 J6 Pin Assignments B 18 Table B 11 J7 Pin Assignments B 19...
Страница 334: ...Jumper Configurations W49 W48 A W47 B A B W37 W66 A W50 B C J7 W67 Figure A 11 W37 W47 50 W66 W67 Jumper Blocks A 34...
Страница 346: ...Jumper Configurations W61 W60 W62 W63 W64 A B A B W65 Figure A 13 W60 W65 Jumper Block A 46...