In a 68K partial address decoding circuit, if the lines A23,A22,A21,A20 were not used then how many different addresses a single physical location can have? Enter a number only. Answer. If we need to build a 680000 system with 8 MB RAM using 128K X 8bit RAM chips then how many RAM chips do we need? Answer:The subroutine SRCH below searches for a certain character in a null-terminated text stored in the memory and pointed at by A5. The subroutine gets the character via D6.B and returns the character count via D7.W . Fill in the missing code exactly: SRCH: MOVE #0,D7 LB: MOVE B D5 CMP.B #0,DS CMP.B D5 LB ADD #1,D7 L9