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These instructions terminate normally on
SS=2. Upon receipt of SS=2, the SSP stores the updated NTA at DM 4
and continues on to the next instruction. The address
contained in the MAR (DM 4) points to the location where the last data would
have been stored had SS=0.
Any SS response besides 0 or 2 will generate an I/O-Error. The
NTA will be stored into DM 4 as above. The
PSW will also be
stored into DM 0 indicating the PC and the SS code that caused
the error.
Next: Block Transfer instructions
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