Intermec PENKEY 6100 Programmer's Reference Manual page 187

SECTION 6
Video, Alternate Settings: (AH=12h) Interrupt 10h
INT 10h, Function AH = 12h, Subfunction 10h: Get Video Configuration Info
BIOS
Feature Bits (CH)
On Entry:
On Return:
INT 10h, Function AH = 12h, Subfunction 30h: Set Scan Lines
BIOS
On Entry:
On Return:
Feature Control Output Bit
R
PEN*KEY 6100 Computer Programmer's Reference Guide
Conversions and Interfaces
Input Status Bit
6-51