CMN - detection of presence bit accessing the destination address

[GoogleCodeExporter]

At the end of the CMN (Enter Character Mode In Line) instruction, it executes a 
portion of the RDA (Recall Destination Address) instruction starting at J=2 to 
load the character-mode destination address. If the TOS word is a descriptor, 
the instruction checks for presence, and if not sets the presence-bit 
interrupt. Neither the Reference Manual or Training Manual state whether this 
interrupt is inhibited in Control State. We are going to assume it is.

Original issue reported on code.google.com by paul.kimpel@digm.com on 11 Jul 2012 at 3:00

[GoogleCodeExporter]

Changed labels: Type=Other, Priority=Low

Original comment by paul.kimpel@digm.com on 11 Jul 2012 at 3:03

• Added labels: Type-Other, Priority-Low
• Removed labels: Type-Defect, Priority-Medium

[GoogleCodeExporter]

Inspection of the flows (RDA, 2.16.0) confirms that p-bit is set only if NCSF 
is also set.

Original comment by paul.kimpel@digm.com on 27 Jul 2013 at 4:36

• Changed state: Done

[GoogleCodeExporter]

Confirmed.

Original comment by paul.kimpel@digm.com on 29 Dec 2013 at 4:33

• Changed state: Verified