The following diagram is from section 5.7 of Zybbok. It is a soda dispensing machine design, including the State Machine

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The following diagram is from section 5.7 of Zybbok. It is a
soda dispensing machine design, including the State Machine and the
Datapath. Select the answers that are correct. (multiple
options, wrong answers deduct points).
1-3) Which outputs of the magnitude comparator are used?
4-6) Which datapath output is needed to support the comparison
tot < S?
7-9) If the HLSM is in state DispSoda, tot is 100, and S is 100,
what is the next state?
10-12) In state DispChange, instead of detecting change = 1, if
the HLSM is modified to compute the change value, which components
need to be added to the datapath? Data operation in state
DispChange: CVal = tot - S
only lt
lt and eq
gt
tot_lt_s
tot_ld
tot_lt_eq
DispChange
Wait
Init
Only a subtractor
A subtractor and a register
A subtractor, a register, and a comparator

The Following Diagram Is From Section 5 7 Of Zybbok It Is A Soda Dispensing Machine Design Including The State Machine 1 (101.16 KiB) Viewed 46 times

S А HLSM: Inputs: C, A (8), S (8) Outputs: 0 Variables: tot (8) 8 D tot_ld tot_clr Add Id cir tot_reg Q d = otot -- 5 Init Wait tot = tot +A tot = 0 !c && (tot <S) !c && !(tot <S) DispSoda d = 1 (tot == S) DispChange A B 8-bit A B 8-bit adder S comparator eg totul s fot_ee_spatapath change = 1