OSBYTE &40

OSBYTE &40 (64) Read modem handshake

 On entry: none
 On exit:  X=b7: -
             b6: -
             b5: -
             b4: BCD Back Carrier Detect
             b3: CD  Carrier Detect
             b2: RI  Ring Indicator
             b1: CTS Clear To Send
             b0: -

Merlin M2100 calls
OSBYTE &40 : Read modem handshake OSBYTE &41 : Select Merlin RAM page OSBYTE &42 : Enable/disable paged RAM	OSWORD &81 : Merlin terminal calls

Jgharston (talk) 14:10, 19 March 2021 (CET)