Philips PM 5191 Operating Manual page 71

E 3-17
Status byte
Example for HP 85:
S = SPOLL (705)
Example 1: masking with 'MSR 65':
i.e. bit 6 and bit @ (dec. 64 + 1) of the status byte are activated. When the instrument
sets one of these bits in the status byte, an SRO is initiated.
Example 2: masking using 'MSR 103';
i. e. bits @, 1,'2, 5 and 6 (dec. 64 + 32 +4 +2+ 1) are activated. When the intrument sets
one or several of these bits, an SRO is initiated.