On 9/24/2015 2:04 AM, ben wrote: > On 9/23/2015 11:22 PM, Eric Smith wrote: > > > 0-99 can hold a trimmed character set and 10 digits per int. > 5 chars per word sounds right on decimal machine. > Logic operations would be on the digit rather the binary > level.
On a 1410 (or 1401) 0-63 can hold the entire character set using char/int conversion instead of storing chars as their native bits, and then we have 5 digits per int as the native integer size (size of an address). 0-127 would be required to hold a character with a work mark bit, which I think one would probably want to make available at a character level, but try and avoid having them set inside of ints. Also, on a 1410 or a 1401 with the right optional features, bitwise operations (bitwise &^|) could still be carried out on a binary level without undue difficulty. As you say, logic operations (&&, ||) would presumably use int 0 and 1 - but could still be carried out on a binary level. >This may not be standard C but I has the early > PDP 11 C feel if they I developed UNIX on decimal machine. > > Ben. > Precisely. JRJ
