i read a lot about memory use for beeb
the problems are big
&a0..&a7= nmi workspace but allso used extensively by the disc and network filing system. so when allso used by SD card , there are troubles
i think i will reclocate the hole &a0..&a7 to &70..&77 space for user
some pointers to the new &d21 (was swap aera )
&a8.. &af are for utilities area. i did store there the skipsector and clustex% bytes. so thats no good
&b0-- &bf is filing system scratch space
&c0-- &cf is filing system dedicated workspace
&c0 -- &cf is used for active filing system , so if you switch the valeus are gone ?
all by all it is not easy
in some books &d00.. &0d5f is nmi code area
in an other part of the book
it is &d00--&d9e it is important for my beeb....mmb at &d70
at &d9f--&def are expanded vector set
so the next smarttest rom , is with new where to put the value bytes
i can use &70-&8f but i think some one will use that ( exmon??)
&90-&9f is econet , not a good option
&f8, &f9 are free by os1.2
zero page is to small
illigal playing with end stack page one ( &100--&1ff ) ???
killing page 10 (&A00--&AFF) TAPE AND RS423 ( PROBLEMS WITH your up rom ??)
killing page 11 ( softkey area ) ???
every thing you do has effect
duikkie wrote:can you make a dump of the &d00 to &e00 if anfs is fitted
allso the DNFS rom at &d00
i think there is the trouble, because i clean the hole &d00 to &d70 area with zero
is econet working with a machine with only tape version ??
&40 at &d00 the rest blank ??
The BBC is a tape-only machine without a disc interface fitted. Probably from a former school network. There is no way for me to check if the econet actually works; I do not have a network set up. It boots up with Econet station 1 (no clock), so that seems fine.
Getting stuff to and from the BBC is a bit of a challenge without a disc interface or MMC, perhaps a good time to build that UPURS cable...
I'll have a look at dumping the memory addresses later this week...