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What parameters should be used for the CNTLUNIT and IODEVICE macros?

April 26, 2017macros parameters Used

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What parameters should be used for the CNTLUNIT and IODEVICE macros?

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A. CUNUMBR in the CNTLUNIT macro is a unique one- to four-digit hexadecimal number in the range of 0000 through FFFE; it is arbitrarily assigned to each control unit. UNITADD in the CNTLUNIT macro is a two-digit hexadecimal number in the range of 00 through FF, which specifies the unit addresses of the I/O devices that are recognized by the control unit. ADDRESS in the IODEVICE macro is a one- to four-digit hexadecimal number in the range of 0000 through FFFF, which specifies the device number. If this configuration is new, try to make aaaa equal to eee. For example, make CUNUMBR=0D00 and ADDRESS=(D00,256). Also, make dd in UNITADD start at the last two digits of eee. For example, make UNITADD=(00,256) and ADDRESS=(D00,256).