[SOLVED] ISA Hardware Diagrams

ISA Hardware Diagrams

ISA Hardware Diagrams

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Load-Store = Reg-Reg (MIPS, ARM)

Accumulator w/ DMA

MAR = Memory
Address Register
AC = Accumulator
Copy AC -> Mem
Mem -> ALU

Comparing the Number of Instructions
Accumulator: B comes from reg_file or data_mem
Loads copy mem->acc; stores copy acc->mem
load-store = ARM/MIPS-like

Code sequence for C = A + B for four classes of instruction sets:
Accumulator
GP Register
GP Register
(register-memory)
(load-store)
ADD C, A, B
LoadR1,A
LoadR2,B
Add R3,R1,R2
Store C,R3

Note: Code != cycle!!

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