Can't boot from a floppy? That’s weird. And honestly, a massive pain in the ass.
Your last real shot is booting via floppy to get onto the C: drive, then enabling the CD-ROM from there, but it could be a headache. Here is what you need to do, but first, grab this stuff:
1) A Windows 95 installation CD. Duh.
2) Two floppies: a) A Windows 95 boot disk b) One floppy with custom config.sys and autoexec.bat files.
3) A formatted C: drive.Get those floppies ready on a different computer first. If you don't have a Windows 95 boot disk, just download one from a link and make a
Windows 95 boot disk. That disk MUST have CD-ROM support built in for when you boot.
Once that disk is ready, find these specific files and copy them onto your hard drive:
AUTOEXEC.BAT
CD1.SYS
CD2.SYS
CD3.SYS
CD4.SYS {Not sure why there are four when you only need one, but whatever, just take them.}
CONFIG.SYS
Microsoft
MSCDEX.EXECopy all those files onto that second floppy—let's call it "BAT & SYS"—and set it aside.
Now, head over to the PC where you actually want to install Windows 95.
1) Boot using the Windows 95 diskette.It should load the system and leave you sitting at the A: drive, or maybe some virtual drive it created. Most likely, it's just A:.
2) Switch over to the C: drive and type DIR.Just to check if the drive is empty and ready for the OS.
3) Go back to the A: drive and type "sys a: c:". That should move the system files from the floppy to the hard drive. If it says "system transferred," you're golden. If not, don't even bother reading the rest of this because I have no clue what went wrong. 😬
Assuming it worked, pull the floppy out and reboot the machine to see if it can boot straight from the hard drive. (If everything above went fine, it should.)
Once it boots up, pop in that other "B&S" floppy and type
COPY A: C:.
That moves everything you need to get the CD-ROM running during boot.
Shut down, plug in the CD-ROM, and power up. When it starts from the C: drive, it should read those lines in CONFIG.SYS and AUTOEXEC.BAT and kick off the system with the CD-ROM active.
I can't guarantee this works in practice—I dealt with similar crap recently on an old junker PC—but theoretically, this is the way.