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On Mon, 2007-01-29 at 08:57 -0600, Peter da Silva wrote: > On Jan 29, 2007, at 6:36 AM, Martin Ebourne wrote: > > I've not had the joy (or maybe hate, who knows?) of programming PDP-11. > > But on the SPARC side, it's a very nice instruction set to program. > > Register windows. > > In 1970, 8 registers (6 usable) was actually above average for a > minicomputer. > > In 1990, 8 registers (6 usable) was hateful. Funny, I seemed to find all 8 local registers usable. And all 8 input registers unless you needed the values. Likewise all 8 output registers were usable unless you call a function. So I make that 16-24 depending on circumstance. And if you're not interfacing to C then you've got 6 of the global registers available anywhere, as you say. I find that better than ARM, and 68k. As for intel, well that's a laugh. Never programmed MIPS or the other risc chips. Of course, the 256 registers on the 6502 are much missed(*). Cheers, Martin. (*) Yes, zero page of course.There's stuff above here
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