[net.micro.amiga] BCPL... Yea But.....

jdg@elmgate.uucp (Jeff Gortatowsky) (02/09/86)

In reference to all the messages about the origins of BCPL ..... fine.
Thank you. Most informative.  But......

What the heck is a BPTR and how should it be used (ie when converting from
a normal APTR), and WHY is it used in AmigaDOS?  Is it a normal pointer,
long word aligned, shifted right by 2?  Why by 2 (assumming the BCPL
langauge knows only of word data types)?  It would seem the LS Bit (bit 0)
is the Word/Byte selector.  Why long word aligned?  

If I've made silly mistakes please feel free to flame.
Thanks for the help.

Oh yes.... Bob Peck, I haven't forgot about that letter I was going to
scribble off. It's just I got my V1.1 kit a couple of days age and have
been virtually in a catatonic reading state ever since! So far the 1.1
RKManuals seem like winners.


-- 
Jeff Gortatowsky       {allegra,seismo}!rochester!ritcv!husky!jdg
Eastman Kodak Company  

<Kodak won't be responsible for the above comments, only those below>