INT 16 - CtrlAlt Associates VGAPAL.COM v1.00 - INSTALLATION CHECK
AX = CA00h
BX = 7670h ("vp")
CX = 7670h
Return: AX = CAFFh if installed
BX = segment of resident code
CX = ??? (0090h)
Note:   VGAPAL is a TSR supplied with STACKEY which makes VGA palette settings
permanent across mode switches

See also: 16CA00

16CA00BX7670 - CtrlAlt Associates VGAPAL.COM v1.00 - INSTALLATION CHECK