Comments; Print Byte; Initialise Printer - Husky MP2500 Manual

Comments

IBM PC BIOS provides three functions:
00H

Print byte

01H

Initialise printer

02H Get printer status
The MP2500 BIOS provides identical functions, but note that only one
printer is supported (LPT1). On MP2500, this is redirected to COM2 and
printing becomes subject to the configuration of COM2: handshaking,
speed, timeouts, data bits, etc.
Print byte
Entry
Exit
Description
Initialise printer
Entry
Exit
Description
280
AH=00H
AL=byte
DX=printer number (0)
AH=status
Sends the byte in AL to the printer port and returns the
resulting printer status in AH.
AH=01H
DX=printer number (0)
AH=status
Sends BS (08H) and FF (0CH) to initialise the printer
and returns the resulting printer status in AH.
H MP2500 System Developer's Guide
USKY