Handbuch / Manual
on the board. There the switch position ON means 0 for the
corresponding address line.
Address 120h would have to be set as follows:
Address line
A11
A10
A09
A08
A07
A06
A05
A04
Switch position
ON
ON
ON
OFF
ON
ON
OFF
ON
Status (120h)
0
0
0
1
0
0
1
0
120 hex = 0001 0010 0000 binary
By means of the address lines A00–A03, single registers are addressed
on the card.
8.3 Interrupt Setting
The interrupt to be used is selected via the jumper panel. The assignment
of single jumpers to the interrupts is indicated on the card. Please make
sure that this interrupt is not used by another card within the PC since this
might cause malfunctions and a damage to the card.
8.4 Memory Occupancy
The COM20022 occupies 8 bytes of ongoing addressable storage as of
the set base address . The timer module covers a further four bytes as of
the base address in addition to 8 bytes for the COM20022.
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