SECTION 6
Conversions and Interfaces
PEN*KEY
R
6200/6300 Hand-Held Computer Programmer’s Reference Guide 6-83
INT 15h, Function AX = 5380h, Subfunction BH = 09h: Set VPP1
NORAPM
This interrupt is a NORAND Proprietary System interface.
Sets MAX781 VPP1 output to
vpp
value.
vpp
must be in 0ć3 range for proper
function, as follows:
On Entry:
AH = 53h
AL = 80h
BH = 09h
BL = VPP1 Value
Output
0
VPP = 0 volts
1
VPP = 5 volts
2
VPP = 12 volts
3
VPP = HighĆimpedance state
On Return:
If successful:
Carry = 0
AH = 0
AL = Undefined
If NOT successful:
Carry = 1
AH = Error Code
AL = Undefined
INT 15h, Function AX = 5380h, Subfunction BH = 0Ah: Set VPP2
NORAPM
This interrupt is a NORAND Proprietary System interface.
Sets MAX781 VPP2 output to
vpp
value.
vpp
must be in 0ć3 range for proper
function, as follows:
On Entry:
AH = 53h
AL = 80h
BH = 0Ah
BL = VPP2 Value
Output
0
VPP = 0 volts
1
VPP = 5 volts
2
VPP = 12 volts
3
VPP = HighĆimpedance state
On Return:
If successful:
Carry = 0
AH = 0
AL = Undefined
If NOT successful:
Carry = 1
AH = Error Code
AL = Undefined
6. Conversions and
Interfaces
