Original version use this way: mount TRD file to drive and test if exist file "boot" in trd image. If exist then continue in booting (in basic RANDOMIZE USR 15619:REM:LOAD "boot". If not exist "boot" file then autoload and program TRDOS NAVIGATOR (from fat16/32). TRDOS NAVIGATOR is best file commander for trdos. Use two windows, work with up to 4 drives, support copy,rename,erase files,etc... From this commander is possible run programs from non bootable TRD image. Very comfortable work and you not need know any trdos basic commands/syntax... For easy way we can implement this:
- after press enter:
1) mount selected file to drive A
2) autoload 48kB snapshot with trdos navigator (state before start commander)
This enable automatic start of commander for each (non bootable and bootable) TRD file. It's better than direct booting...
I have software for trace esxdos system direct on real ZX Spectrum. Runable direct from NMI BROWSER :-)