Msg: 4407 *Conference*

06-15-93 11:02:43

From: TRACY ALLEN

To : DAVID BROWN

Subj: REPLY TO MSG #4401 (XR4)

Dear David,
  I'll upload the very latest version of the XR4MNU program to you.  Use it to
replace your current version.  I am assuming that somehow a corrupted version
of the XR4MNU program made it into your system.  Do you use any ROMs in your
system?  The latest version of the program handles turning off the ROM chips
much more elegantly than the earlier versions.  Most problems with corruption
of the XR4MNU program came from switching between ROM chips without
deactivating them fully.
   
 You can always switch banks, even if you don't have the XR4MNU program
available.  Or, if the XR4MNU program is corrupted in one bank, you can always
load it in from another bank.  These are direct commands, described as the
"emergency commands" on pp 23-24 of the XR4 manual.  Specifically, to select a
specific bank, you enter BASIC and type:
  bank#          type:                 or type:
   1              OUT128,0    or    OUT128,32
   2              OUT128,8    or    OUT128,40
   3              OUT128,16   or    OUT128,48
   4              OUT128,24   or    OUT128,56
 The difference between, say OUT128,0 and OUT128,32 is that the former selects
the bank 1 with the "write-protect" turned off, while the latter selects bank 1
with the "write-protect" turned on.
Suppose for whatever reason, you get that "?UL Error in 15" message.  If you
want to load in the good copy of XR4MNU from bank 1, you would type,
  OUT128,32:XR$="XR4MNU.BA":CALL63012'+
The program will load and run automatically.  Hit BREAK (Shift-Pause), and
type,
  SAVE"XR4MNU.BA" if you need to replace the version of XR4MNU that is
currently stored in RAM.  
  
 Tracy