3 Oct
2007
3 Oct
'07
12:04 p.m.
Peter C. Wallace wrote:
The registers-in-memory architecture might be suitable
for a FPGA CPU
where BlockRAM (as system memory) is almost as fast as registers. Why
not have registers in memory instead of simulatiing it badly (and
expensively power wise) via caching, that is, why move data if you dont
have to?
Simple registers are expensive. Look at the PDP-5. This is the 1960's
when most architectures where developed. Even the PDP-10 I think
was designed to use core memory as registers unless you want the
optional module for F/F registers.
Ben.