CompuServe Messages

New Computer

#: 34524 S/Help/AnnouncementsForum unknown
    27-Sep-86 19:27:03
Sb: #34459-New Computer
Fm: Bela Lubkin 73047,1112
To: Tom Fairlie () 74746,3172

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Don't assume that a 65816 running at 2.5MHz is slower than a 68000 at 7.16MHz — the 65816 uses many fewer clock cycles per instruction. (You'd have to look at instruction set references for both to get an idea of the actual difference, but at a guess, they are probably about equal). The 65816 CPU is much less >powerful<, though — less registers, weaker instruction set. Offsetting the lower number of registers is the availability of the "zero page", 256 bytes of RAM that can be accessed with a 1-byte address. Unlike the 6502, the 65816 can reassign the zero page, so there are really an unlimited number of semi-fast registers (256 for each process, e.g., in a multitasking environment). It's not in CPU speed that the Amiga beats the IIgs, but in graphics power (blitter/copper) and multitasking. The IIgs' sound may be better than the Amiga's. I think it will turn out to be "more of the same" — the same quality as the Amiga's, but more voices at once. – Bela