Re: 48-bit RISC

["David Dunfield" <ddunfie@xxxxxxxxxxxx>]

CISC machines were 48 bit

> Hi Everyone,
> 
> I am not sure if this question is right for this forum, or whether it
> has been asked before.
> 
> When IBM first advertised RISC on the AS/400, it was a case of "64 
bits,
> no buts...". That implied 64-bit all the way through! Now, was the old
> SPD technology on the CISC machines 48 or 64 bit? Why do we have 'low
> speed' and 'high speed' slots on the older RISC machines?
> 
> In my mind, the SPD technology is 48 bit, with the low speed slots on
> the RISC systems there to accommodate 48-bit within the RISC
> environment. Am I wrong in my assumptions? Please enlighten.
> 
> I know that this probably has no bearing on the new equipment; it is
> just that the recent discussion regarding the 'new' 64-bit OS's that 
are
> due have brought this to mind again.
> 
> Thanks.
> 
> Jan.
> 
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> 

Dave Dunfield
Midwest Integrated Systems Resources
AS/400  and LANSA Expert
PO Box 1481
Portage, MI 49081
 
Phone-269-373-3049 Cell 269-501-5685