Date   : Fri, 30 Oct 2009 21:50:19 +0000
From   : jgh@... (Jonathan Graham Harston)
Subject: Tube OS Memory Map

"Mark Usher" wrote:
> Do the areas 0000-&0400 when running a program on the 6502 co-processor have
> the same memory map as the BBC locations 0-&0400 without the co-pro running?
 
&0000-&008F : Current language/foreground program use
&0090-&00FD : OS use - DO NOT TOUCH!
&00FD-&00FE : Pointer to last error
&00FF       : Escape flag
&0100-&01FF : 6502 machine stack
&0200-&0235 : Vectors
&0235-&03FF : OS use - NO NOT TOUCH!
&0400-&07FF : Current language/foreground program use
&0800       : Lowest possible bottom of user memory (PAGE)
&F800       : Highest possible top of user memory (HIMEM)
 
-- 
J.G.Harston - jgh@...                - mdfs.net/User/JGH
There are three food groups: brown, green and ice cream.