Re: ARM Holdings Instruction Set Bias
The first versions of RISC OS used no C whatsoever. IIRC, a C compiler only came later. ARTHUR, the predecessor to RISC OS, did indeed write parts of the GUI in BBC BASIC, but when RISC OS replaced it, the GUI was all assembly language.
As for C influence on the ARM ISA, I doubt there was any. Yes, there are autoincrement/decrement loads and stores, but I believe these were inspired more by PDP11 and VAX, and were more general than the C ++/-- operators. Essentially, after you calculate an address (which can include a scaled register offset), you can write that back to the base address register.
Biting the hand that feeds IT
