Tandy 1000 Programmer's Reference Manual page 210

Chapter 6 I BIOS Services
Get Current Printer Status
Read the printer status into AH.
Entry Conditions:
AH
=
2
Exit Conditions:
DX
=
printer to be used (0-2)
AH
=
printer status, as follows (set
=
true):
bit 0
=
timeout occurred
bit 1
=
[unused]
bit 2
=
[unused]
bit 3
=
I/O error
bit
4
=
selected
bit 5
=
out of paper
bit 6
=
acknowledge
bit 7
=
not busy
System
Clock
These routines provide methods of reading and setting the clock
maintained by the system. This device is labeled
CLOCK
in the
device list of the operating system. An interface for setting the
multiplexer for audio source is also provided.
Software Interrupts:
1A hex (26 dec)
Function Summary:
AH
=
0: Get Time Of Day
AH
=
1: Set Time Of Day
AH
=
80H: Set Up Sound Multiplexer
Function Descriptions:
Get Time
Of
Day
Get (read) the time of day in binary format.
Entry Conditions:
AH
=
0
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