STD        Double STore accumulator A:B
Category:  Load and store
Function:  M:M + 1 <-- (ACCAB)

Effects on the Condition Codes
H = N/A
I = N/A
N = AB15
Z = ~AB15&~AB14&~AB13&...&~AB0
V = 0
C = N/A

ADDR    MNEM    OPER        1st     2nd     3rd
MODE    ONIC    FRMT        BYTE    BYTE    BYTE
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DIR     STD     M           DD      M
EXT     STD     M           FD      MH      ML
INDEX   STD     Disp,X      ED      Disp