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M E f1 0
To: CSL, Learning Research Group Date: June 6, 1974
From: (len ~/egbre it Location: Polo Alto
Subject: Alto Virtual f1emory Proposal O'rnan 1za t 1on: PARC'/CSL
Archivu category: Alto
1) Summllrl
I propose implementing a virtual address space of 2f24 \-/ords at the
instruction level. All lun~llIage systems can usc this virtual address space.
Hil P pin n v i I~ L1I a 1 tl d d res s e sin top hy sic a 1 add r' e sse sis don c' , i nth e rn 0 5 t f r e que n t
Cilse, \'1iLh a small set of non-associative mapping registers.
Pro GI~ il rn s run i n II 2 t 24 bit vir t u il 1 odd res ssp nc e . I I 1 1 d ; s c u s sad d res sin g
tllis space in lerms of a Nova-like instruction sot not because this is optimal
but because its a concrete placc to stnrt