HP Vectra User Manual

The following chart gives examples of loading the divisor latch
registers
to determine the baud-rate.
Baud
MSB
(XF9H)
Bits
(XF8H)
Bits LSB
Rate Divisor 7 6 543 2
1 a 7 6 543 2 1 a
75
1536 a a a a a 1 1 a a a a a a a a a
110 1047 a a a a a 1 a a
000 10 111
300 384 a a a a a a a 1 1 a a a a a a a
600 192 a a a a a a a a
11000000
1200 96
a a a a a a a a
a
1 100 a a a
2400
48
a a a a a a a a
a a
1 1 a a a a
4800 24 a a a a a a a a
a a a
1 100 a
9600
12
a a a a a a a a
a a a a
1 100
19200 6
a a a a a a a a
a a a a
0 1 1 a
Interrupt Enable Register (XF9H)
This register enables and disables the four interrupt signals of the
~
HP24540A.
Bit Data
Interrupt
a
1
Enable the received data available interrupt.
a
Disable interrupt.
1
Enable transmitter holding register empty interrupt.
a Disable interrupt.
2
1 Enable the receiver line status interrupt
a Disable interrupt.
3 1
Enable the modem status interrupt.
a Disable interrupt.
~
4-7
a
Always.
126 Serial/Parallel Card

HP Vectra Specifications

General

Processor	Intel Pentium
RAM	Up to 128 MB
Storage	HDD (capacity varies by model)
Operating System	Windows 95
Graphics	Integrated
Ports	Serial, Parallel
Expansion Slots	ISA, PCI