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Started by R.TRAUBEN
Fri, 10 May 1985 01:56
what is motorola 68851 mos vlsi mmu translation time?
Author: R.TRAUBEN
Date: Fri, 10 May 1985 01:56
Date: Fri, 10 May 1985 01:56
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1290 bytes
1290 bytes
Hello: Motorola claims 45 nanoseconds for 68851 translation time on the paged mmu (vlsi version, not the ttl mini-board gate array version)! Measured from what event (as a starting reference) to what event (as an ending point)? Virtual address valid to Physical address valid? Virtual address Strobe valid to Physical address valid? Virtual address Strobe valid to Physical address STROBE valid? Does the Translation end point include the time to do access rights checking? Any help is appreciated. I'm confused on what 45 really means. Thanks, > Richard P.S. Address out times alone on 68xxx (*MOS) parts are in the vicinity of 30 nanoseconds!
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