Nowadays many bootable CDs let the user choose whether to boot from the hard disk or the CD when booting the system. How is this done? I looked at the image file inside, and it seems there is an extra file called jo.sys. Ordinary DOS boot disks usually only have these two files, io.sys and msdos.sys. Please give me some guidance, experts.
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中国DOS联盟论坛 » DOS启动盘 & LOGO技术 （启动盘室） » [Help] Can you choose to boot from the hard disk, CD-ROM, or floppy at startup?
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Posted 2003-04-18 00:00 · 中国 福建 福州 电信
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Posted 2003-04-18 00:00 · 中国 湖北 武汉 蔡甸区 电信
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My instant Chinese-localized boot disk has jo.sys in it.
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Posted 2003-04-18 00:00 · 中国 福建 福州 电信
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Could you explain the principle? In other words, how do you modify io.sys so that jo.sys can be loaded?
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Posted 2003-04-18 00:00 · 中国 黑龙江 哈尔滨 联通
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Neither is right! jo.sys is actually another piece of software! Made by a foreign expert!
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Posted 2003-04-18 00:00 · 中国 北京 263网络通信股份有限公司
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Not necessarily. The Win98 CD boot disk also comes with JO。SYS, it's Microsoft's own.
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Posted 2003-04-22 00:00 · 中国 广东 广州 越秀区 电信
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The latest version of JO.SYS is 1.4
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Posted 2003-04-22 00:00 · 中国 台湾 远传电信
What is JO.SYS used for??
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Posted 2003-04-23 00:00 · 中国 黑龙江 哈尔滨 联通
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On a boot floppy, it lets you choose whether to boot from the hard disk or the floppy!
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Posted 2003-04-23 00:00 · 中国 北京 263网络集团BGP节点
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There is no need to modify IO。SYS。 As long as there is JO。SYS on the boot disk, IO。SYS will load it automatically.
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Posted 2003-04-23 00:00 · 中国 北京 263网络集团BGP节点
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JO。SYS included with the 98 boot CD
Open attachment
Open attachment
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