中国DOS联盟

我之所以将SYS命令去掉了，主要是想证明ROM-DOS.SYS根本就不是ROM-DOS的核心文件。

确实不是，用DISKTOOLS制作启动盘时，只需三个核心文件就可以了。但奇怪为什么SYS命令需要ROM-DOS.SYS呢？

ROM-DOS这样做，大概也是一种便利性吧，这样只需ROM-DOS.SYS和COMMAND.COM就可以用SYS命令来在任何地方都可以完成传递系统的操作。

ROM-DOS 6.22 的手册中写着的:
“……The /S switch causes FORMAT to copy the ROM-DOS system files, ROM-DOS.SYS and
COMMAND.COM, onto the disk. The file ROM-DOS.SYS is renamed and stored on the disk as
files IBMBIO.COM and IBMDOS.COM, which are stored as hidden files, unless the /H option is
used.……”

以下是ROM-DOS 7.10的使用手册中关于SYS命令的介绍：

The SYS command copies the ROM-DOS system files ROM-DOS.SYS and COMMAND.COM from the disk in the default drive to the disk in the specified drive.
The file ROM-DOS.SYS is renamed and stored on the disk as files IBMBIO.COM and IBMDOS.COM, which are stored as hidden files.

Use the SYS command to transfer the ROM-DOS system files to a floppy disk or hard disk. The disk can be a formatted blank disk or can contain files; it is not necessary for the system files to be the first files on the disk. The only requirement is that there is enough contiguous free space on the disk for the new system files to be placed. If the disk already contains system files, installing the new system files deletes the existing files. The command processor, COMMAND.COM, is also transferred to the disk and does not need to be copied into the same contiguous space as the system files.

先学会怎么提问再说吧。
把你帖子的标题改好点。
对这种标题的帖子以后有可能只有这三种下场：
1。没人理。（这是最好的情况）
2。被转移到灌水区。
3。被删。