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NNTP-Posting-Date: Sat, 12 May 2018 22:20:49 -0500
From: Dennis Lee Bieber <wlfraed@ix.netcom.com>
Newsgroups: comp.lang.ada
Subject: Re: Forth and others (Was Re: How to get Ada to ?cross the chasm??)
Date: Sat, 12 May 2018 23:20:50 -0400
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On Sat, 12 May 2018 19:21:15 -0700, Paul Rubin <no.email@nospam.invalid>
declaimed the following:


>
>Yeah that's pretty standard in old processors including more recent ones
>like the 6502 (still used by Forthers with old Commodore 64's).  
>

	Not as I recall... It was a 6502 aspect as it had instructions that
could access the first page with a short address/byte offset; the 8080/Z80
& 6800 did not have a "base page" -- any memory access (on 8080/Z80) used
HL registers as a pointer, and could thereby access any byte in the 64K
memory -- but required use a 16-bit register pair for the address. 6502
could access the first page using an 8-bit immediate offset.



-- 
	Wulfraed                 Dennis Lee Bieber         AF6VN
	wlfraed@ix.netcom.com    HTTP://wlfraed.home.netcom.com/