Test13: ADD and SUB instructions Command File, Result

Command File

clock clka 0 1 0 0
clock clkabar 1 0 1 1
clock clkb 0 0 0 1
clock clkbbar 1 1 1 0
vector ir ir3 ir2 ir1 ir0
vector state s1 s2 s3 s4

ana state entp ldma readdm ldtp ldacc bus2acc loading ir

V RESTART 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

V LOADDONE 1

V ENTER 1

V DMSEG 0

V IMSEG 0

V ir 1110 1110 1110 1110 1110 1110 1110 1110 1110 1110 1110 1110 1110 1110 1111 1111 1111 1111 1111

R

Notice:

• The opcodes correspond to ADD and then SUB
• During ID, the MA is loaded with the address location in the TP (ENTP and LDMA)
• During OF, the data in DM is loaded into the TP (READDM and LDTP)
• During EX the ACC is loaded with the result of the ALU operation, so BUS2ACC is low while LDACC
• The instructions require two operands and need the value in the TP so ENTP is asserted