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From: eich@uiuccsb.UUCP
Newsgroups: net.micro.16k
Subject: Re: Wanted: Dev board; X-compiler - (nf)
Message-ID: <5041@uiucdcs.UUCP>
Date: Sat, 21-Jan-84 03:33:10 EST
Article-I.D.: uiucdcs.5041
Posted: Sat Jan 21 03:33:10 1984
Date-Received: Mon, 23-Jan-84 04:27:22 EST
Lines: 13

#R:hp-dcde:30900001:uiuccsb:4500003:000:422
uiuccsb!eich    Jan 21 00:55:00 1984


I don't know why MOD was made 16 bits (maybe just to save space, both
on the chip and on the stack whenever CXP{D} or an interrupt is
handled?).  But with the MMU, the OS can map ROMs which lie in low
physical memory anywhere you like anyway.  Or lacking the MMU (which
doesn't translate addresses after reset until programmed), why not just
overlay ROM while booting, then disable it?

Brendan Eich
uiucdcs!uiuccsb!eich