China DOS Union

When there is only one Fat32 partition on the hard disk as C: and the CD - ROM is loaded as D: and the CD - ROM is empty, when running UCDOS, the screen shows the prompt: General failure reading drive D Abort, Retry, Fail? No matter which one is selected, the startup fails. If the CD - ROM is not loaded, there is no problem. Or put a CD in the CD - ROM, there is no problem. Or if there are two Fat32 partitions, there is no problem. That is to say, when there is only one Fat32 partition on the hard disk, the CD - ROM is loaded and there is no disc in the CD - ROM, UCDOS will automatically read the CD - ROM when starting up! It's really strange.

[ Last edited by brglng on 2006 - 6 - 9 at 14:02 ]

Check your batch script to see if there are commands that access the CD drive to find files, such as "if not exist %cdrom%:\*.*"

Or add the parameter "SHELL=COMMAND.COM /E:640 /P /F" in config.sys

There are no commands related to the optical drive in the UCDOS batch processing. In autoexec.bat, there is only the command to load shsucdx, and even findcd has never been run. Moreover, there is no problem with using other Chinese character systems. Just now I tried again, and choosing Fail can start normally. The problem is with the program RD16.COM. Running rd16 directly in the command line will cause the above-mentioned prompt.

The CD - ROM is for read - only access. It is suggested to create a virtual disk, copy all the files in the UCDOS directory to the UCDOS directory of the virtual disk and run UCDOS. The COMMAND.COM /F parameter is just Fail.

I tried again. If the virtual disk drive letter is before the CD-ROM drive letter, there is no problem; if the virtual disk drive letter is after the CD-ROM, UCDOS still shows the above prompt, and even copying UCDOS to the virtual disk doesn't work.

Then, is it that UCDOS is missing a certain file RD16.COM and trying to find this file?

Check if there are any missing files in my UCDOS directory. The files are:

DRV
FNT
ASC16
CONVERT.EXE
DEMO.BAT
HZK16
KNL.COM
LIMD.COM
PY.COM
PY.USR
QUIT.COM
RD16.COM
RDFNT.COM
README.EXE
README.TXT
TM.COM
TM.EXE
TMHELP.EXE
TX.COM
UCDOS.BAT
UCT.COM
VIDEOID.COM
WB.BAT
WPS.COM
WPS.EXE
WPS1.OVL
DRV\CGA.DRV
DRV\EGA.DRV
DRV\HGC.DRV
DRV\PY.OVR
DRV\VESA.DRV
DRV\VGA.DRV
DRV\WB.IMD
FNT\ASCPS

Even if you look for it, you wouldn't go to drive D to find it.