China DOS Union

I ran into a difficult problem while writing a boot floppy batch file: I originally wanted to load a path from the CD, but during testing I found that it errors out when there is no disc in the CD-ROM drive! I used set comspec command /F before, but found that it still wouldn't work. Could one of the experts help me?

Is there some DOS tool that can compare the size of two numbers and return a variable value? I want to use it to compare two numeric variables

Thanks, experts!

There are plenty of them, for example ASET and TESTIF. You can download them from the site's "script tools" section.

1.What I need is to test whether a CD is inserted (similar to testing whether the floppy drive door is open).
2.The English stuff is too hard to deal with. I want to automatically detect hard disk capacity in a batch file, so I can use gdisk to partition automatically; but at the moment
I can only save the partition size into a variable, and Testif can only compare binary numbers. Wengier, can you help me sort this out? Thanks!!

Using CDA can detect whether there is a disc in the CD-ROM drive.

Use the DREADY command. It can not only check whether there is a disc in the CD-ROM drive, but also whether there is a floppy disk in the floppy drive.

Thanks to Wengier and pfox, the first problem has already been solved. When I used DREADY I wrote the test statement backwards. Now I urgently hope to solve the second problem.

Then use the ASET command; it can compare decimal numbers.

I took a look, and this software is really hard to deal with. I'll wait until I find someone to translate it first.

Here's an example: ASET A=IF(20 GT 10,Y,N), then when 20 is greater than 10, the value of A will be Y; otherwise it will be N.