[Simh] SC/750

[Bob Supnik]

While no RH750 spec has been found, the spec for Emulex's SC/750 is 
online. It provides a detailed summary of the RH750 internal registers. 
As I suspected, the RH750 is a subset of the RH780, with lots of status 
bits and a register or two omitted. It also adds a mode not present in 
the RH780 - ignore byte count mode.

Unfortunately, it doesn't answer the question of how BBS/C works. The 
spec says that accesses "should" be done with longword instructions but 
doesn't say what happens in other cases - unlike the RH780 spec, which 
says explicitly that a machine check occurs.

/Bob