zxdiv: update README

diff --git a/Kernel/platform-zxdiv/README b/Kernel/platform-zxdiv/README
index b9b3930..43659ca 100644 (file)
--- a/Kernel/platform-zxdiv/README
+++ b/Kernel/platform-zxdiv/README
@@ -63,10 +63,14 @@ around we exchange it with bank 6 as we go.
 
 To Do:
 
--      Crash on pre-emption, appears to be a bug in fuse-1.5.4
 -      Why does ls /bin lose the lowest pixel row of the 'yes' command ?
        (Seems we lose the bottom line of the left most char - off by one bug
         in zxvid ?)
+-      Hand optimized bank exchange and bank to bank copy routines. These are
+       fairly performance critical due to the limitations of the memory model.
+       Right now we ldir in one case (could be faster abusing stack), and
+       the exchange case could be made much much faster using registers
+       and stack tricks not bounce buffers
 -      Set video space in CODE3 bank to 0 not 0xFF for neatness
 -      Look at what is needed for other suitable interfaces. DIVMMC would
        in particular be good to support but that means another harder
@@ -81,7 +85,8 @@ To Do:
        RAM (up to 512K). That at the very least would make a kick ass
        ramdisc/swap device even if the unit lacks the allram switch
        (May also make sense to hae a build 'the other way up' where we
-       page apps out of 0000-3FFF copying 4000-7FFF. 
+       page apps out of 0000-3FFF copying 4000-7FFF for allram devices on
+       a 128K machine
 -      Speccyboot (ENC28J60)
 -      SpectraNet (W5100)
 
@@ -169,3 +174,5 @@ DONE        -       Check the swap hooks are ok
 DONE   -       Turn on swap so we can make progress
 DONE   -       Debug crash on swapping
 DONE   -       Hangs on pause(). Review p->p_timeout behaviour
+DONE   -       Crash on pre-emption, appears to be a bug in fuse-1.5.4
+               (moved code/consts to avoid Fuse bug, filed Fuse bug)