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DOS启动盘 & LOGO技术 (启动盘室) » Problems with non-standard boot floppies
Printable Version  5,472 / 22
Floor16 MYS Posted 2003-05-17 00:00
元老会员 Posts 1,637 Credits 5,170 From 广东佛山
I compressed it into a CAB file separately, and placing it in the EBD takes too much startup time.
Floor17 nre Posted 2003-05-20 00:00
银牌会员 Posts 361 Credits 1,210
This question can be answered clearly for everyone. The boot disk of EL TORI can only support 5 modes "No emulation/1.2/1.44/2.88/HD" without the help of other boot software. The so-called image of any size is actually an HD image.
To make a 2.88 boot image, you don't have to have a 2.88 floppy drive. You can convert it with WINIMAGE. Add this 2.88 image with WINISO. After making the boot ISO file, modify it with a hex editor
(Let me add a sentence: The reason for such cumbersome manual modification below is that when WINISO loads the image, it doesn't detect the format of the image, and it一律sets the image to 1.44M.)
Find the position of 34816 (this is a decimal number, and some editors display it in hexadecimal)
http://www2.zzu.edu.cn/ie/newdos/uploadImages/20035200255551978.jpg
Find the position of 14h in the picture. This 14h is the default loading address (LBA/RBA) of the boot image. Converting 14h to decimal is 20. It means the 20th sector. 20*2048=40960 (each sector of ISO9660 CD is 2048 bytes). Then find the position of 40960
http://www2.zzu.edu.cn/ie/newdos/uploadImages/20035200293183207.jpg
As shown in the figure, change 88 02 to 88 03. 03 is 2.88M
88 means bootable
The following numbers
00 No emulation (most boot software need to set this boot mode to this)
01 1.2
02 1.44
03 2.88
04 HD
For specific methods of manually making or modifying CD boot disks, take a look at the previous
Single-boot CD making 1
http://www2.zzu.edu.cn/ie/newdos/dispbbs.asp?boardID=11&ID=1094
Single-boot CD making 2
http://www2.zzu.edu.cn/ie/newdos/dispbbs.asp?boardID=11&ID=1095
And format descriptions from IBM and Phoenix
http://www2.zzu.edu.cn/ie/newdos/dispbbs.asp?boardID=11&ID=1096
Understanding these will play a very important role in making boot CDs.
Floor18 nre Posted 2003-05-20 00:00
银牌会员 Posts 361 Credits 1,210
By the way, is there a problem with the unerase of nu2002? When I used the unerase for 2000/2002, it could run but couldn't recover files.
Floor19 Dark-Destroy Posted 2003-05-20 00:00
元老会员 Posts 3,551 Credits 8,312
Quote from nerdpal on 2003-5-16 10:54:53:
Recommend a good floppy drive emulation software ramdisknt15 for everyone. I didn't see where to attach the file. Everyone can search it on the Internet. It can emulate 1.44, 2.88, and hard disks. The effect is still quite good.

Where is it?
Floor20 Wengier Posted 2003-05-20 00:00
系统支持 Posts 10,521 Credits 27,736
It seems that Norton's products sometimes have serious bugs! UNERASE 97/2000/2002 is a good example. UNERASE 95 has no problems.
Floor21 nre Posted 2003-05-20 00:00
银牌会员 Posts 361 Credits 1,210
ramdisk is under http://www.cenatek.com/product_ramdisk.cfm, with 3 versions.
Floor22 Rock2000 Posted 2003-05-20 00:00
初级用户 Posts 31 Credits 192
For irregular capacity CD boot, it is best to use Bootable CD Wizard (BCDW) v1.50, at http://bootcd.narod.ru. The Chinese example is posted by Wuyou HLK94 in my fine products reprint. Chinese http://www.downbest.net/down/article/note/250.html, for your reference.
Floor23 MYS Posted 2003-05-21 00:00
元老会员 Posts 1,637 Credits 5,170 From 广东佛山
In terms of bootable CDs, please give me more guidance in the future, ROCK.
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