ARM PROCESSOR
ARCHITECTURE OF 8085
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Detailed explanation-1: -Like the x86 (but unlike the 68K), ARM instructions typically have a two or three operand format, with the first operand in most cases specifying the destination for the result. Load multiple and store instructions are an exception to this rule. The 68K, by contrast, places the destination as the last operand.
Detailed explanation-2: -∎ ARM has 37 registers all of which are 32-bits long.
Detailed explanation-3: -ARM processors have 37 registers. The registers are arranged in partially overlapping banks. There is a different register bank for each processor mode. The banked registers give rapid context switching for dealing with processor exceptions and privileged operations.
Detailed explanation-4: -In all ARM processors, the following registers are available and accessible in any processor mode: 13 general-purpose registers R0-R12. One Stack Pointer (SP). One Link Register (LR).