Latest version v0.25.08
- Corrected code to ensure that before returning control to the
  Basic Interpreter, the interrupts are always enabled

changes in version v0.25.07
- Corrected code that BOOTs a disk on drive #1
Now OS-9 as well as NitrOS-9 do boot correctly when using
the autoboot feature (pressing space bar on start)

Changes in version v0.25.06
- Stops the drives motor on starting

Changes in version v0.25.05
- Added code to DSKINIT on the fly any VDK file while creating it.
Unfortunately, despite we write a VDK extension, the SDC firmware
was always creating a DSK-like file, that's to say an VDK without
any header. When we dskinited it next step, everything worked alright 
because the DOSPlus is asking for sectors to the SDC and this last
is working without header, so despite everything worked flawlessly, 
these created files on the SDC would not work on Drivewire.

I have found that writting all the sectors of the disk (as formatting)
we can create a real VDK file with a header 256 byte long.
Unfortunately as the SD firmware still thinks it is a DSK file, it is
MANDATORY to unload the disk with SDRIVEn,UNLOAD and then mounting it
again SDRIVEn,"Filename"
So, I have addded a bit more of code so that the program does this 
two steps for free!

- When we created a DSK file, we were prompted to DSKINIT it 
  from now on, it is dskinited by the program as well, so no more
  extra commands after SDRIVEn,"FileName",NEW,xxx

Formatting the VDK, DSK by the program is a bit faster than entering
the DSKINIT command at the prompt and waiting for it to finish.
Disks 180k need 7 sec to be ready, 15 sec for 360k and 30 sec for 720k

Changes in version v0.25.04
- The drive 1 only boots if the user presses the "SPACE bar" on start
  else this step is skipped.
- As a standard second step, there is a call to the AUTOLOAD.DWL file
  that, in case you have the Drivewire server ON and this file does
  exist in the root of DW4, it will autostart. If any of previous 
  conditions is false, then the extender will simply show the OK prompt
  as usual.
  If you don't want the AUTOLOAD.DWL file to auto-start, you have to
  press the SHIFT key, much like you would have to do if you had the 
  modified Dragon64 ROM from Tormod Volden.
  So the behaviuor is:
  - No pressed key    = AUTOLOAD.DWL (drivewire) autoStarts if possible
  - Space bar pressed = drive 1 is Booted if possible
  - Shift key pressed = right to the OK prompt

Changes in version v0.25.03
- added the AutoBOOT feature.
  On starting the extender will try to BOOT a disk in drive 1
  
Changes in version v0.25.02
- corrected a bug that hanged the program with command SCOPY MEM
  in an environment with an MPI, floppies and CoCo-SDC when executed 
  from ROM, despite it worked alright from RAM (map1)

Changes in version v0.25.01
- corrected a bug that made the program hang when using SDIR or SDIR-
  in an environment with an MPI, floppies and CoCo-SDC when executed 
  from ROM, despite it worked alright from RAM (map1) 

Changes in version v0.25.00
- allow the use of drives 3-4 as floppies while keeping 1-2 for DW4 
  while having the CoCo-SDC connected too.
  This is not the best combination, for sure, but has to be possible!
  With last version, it failed if MPI was pointing to the SDC slot

Changes since version v0.23.O to the new version: v0.24.E6
- drives 3-4 don't pass through the filter FDC-SDC
- added command WRITE MEM @n,start,dest,length
- after flashing a bank, it resets the computer
- tstHDW is executed from RAM to change of slot if needed
- if not MPI present, does individual tests, 1st SDC then FDC
- BANKn issues a coldstart if there is an OS
- BANKn now starts a ROMPACK (like CoCo RUN @n) if not an OS
- LLINK shows HD index on unit 4 if selected
- commands now return to caller Basic programs
- Sound and Play blocked next DW4 access
- added command SCOPY MEM @bank,start,dest,length 
- added command SCOPY MEM SLOT number,start,dest,length 
- added parameter to BANK n to start it in MAP1: BANK n,R
  that way I can start any DOS in MAP1 and use my floppies
  or the SDC changing of slot by means of the POKE &HFF7F,SlotNumber
  without getting the computer hanged.
  Living in MAP1 allows to boot a FLEX disk from floppy, but from SDC
  fails anyway you try it
- some code corrections (data/stack checking ...)
- now WRITE MEM allows the user to write partially a bank, so you
  can write sectors 1-2 first time and later sectors 3-4
  The flasher only erases the sectors it is going to flash.
- Backup now accepts FLEX discs too
- WRITE and SCOPY have default values for last three parameters
