BSDOS and BSROM

[TeamMB03+]

Here is a summary of BSDOS 308b and BSROM improvements (up to the firmware revision 20191030):

• extended disk/directory listing (26char patch implemented)
• user autoboot - an autoexec file on the @3$0
• reset of all AY and SAA soundchips using NMI+E and NMI+I
• reset of the General Sound using NMI+G
• GS reset from Basic command line using the character "="

Because floppy discs have been replaced by memory cards in the MB03+ Ultimate, improvements of the BSROM were put in place of routines resetting the FDC and stopping FD drives.

[MB03+Team]

How to prepare and update CF card for use with BSDOS

Please use a CF card with max. capacity 4GB. If you have a bigger one than 4GB you need to create partitions on it, with 4GB size max.

1. Format the CF card, use a FAT16 file system!

2. Download the newest backup of the CF image (CFxxxxxxxx.ZIP file) from web page https://sites.google.com/view/mb03plus/download

3. Copy files 003.mbd to 256.mbd from the ZIP file to the CF card. It is very important to copy these files first,  one by one, in the right order - please check all listed MBD files in the ZIP archive are soorted by names, 003.mbd, 004.mbd, 005.mbd, 006.mbd etc. to 256.mbd.

4. After MDB files, you can copy another files or directories (if needed, all other than MBD files are intended for DivIDE only).

5. The next time, for the future updates, if you want update only some MBD files, just overwrite the selected file with a new one, e.g. copy only 200.mbd from a ZIP card backup archive to your current CF.