It's been a while since I last fiddled with a proper autoexec/config setup on a real DOS machine. So when I dug out my 486 - an IBM Aptiva 330 with some pretty major internal mods, not the least of which was a Roland MT-32 - I was eager to try some of my games on it to relive those old memories of System Shock.

Except evidently, the last time I used this machine, I had disabled the CD-ROM support, and I wasn't smart enough to just REM out the MSCDEX stuff. Starting the MSCDEX essentially from scratch, this is what I came up with:

1[AUTOEXEC.BAT]
2@ECHO OFF
3PATH C:\WINDOWS;C:\DOS;C:\
4SET TEMP=C:\DOS
5c:\dos\mouse
6REM c:\dos\share.exe /l:500 /f:5100
7c:\dos\doskey
8REM LH c:\dos\mscdex.exe /V /L:D /D:MSCD0001
9REM LH c:\dos\mscdex.exe /E /V /L:D /D:MSCD0001
10c:\dos\mscdex.exe /V /L:D /D:MSCD0001
11
12[CONFIG.SYS]
13DEVICE=C:\DOS\HIMEM.SYS
14rem device=C:\dos\emm386.exe highscan noems I=e000-f4ff x=f500-feff
15device=C:\dos\emm386.exe highscan I=e000-f4ff x=f500-feff
16device=c:\dos\ramboost.exe load
17REM LASTDRIVE=G
18LASTDRIVE=D
19dos=high
20BUFFERS=10,0
21FILES=50
22FCBS=4,0
23SHELL=C:\DOS\COMMAND.COM C:\DOS /P /E:512
24STACKS=9,256
25DEVICE=C:\DOS\MTMCDAI.SYS /D:MSCD001
26rem DEVICE=C:\SB16\DRV\CTSB16.SYS /UNIT=0 /BLASTER=A:220 I:5 D:1 H:5
27rem DEVICE=C:\SB16\DRV\CTMMSYS.SYS

Yes, I know they're messy. Especially Autoexec: I've got three different MSCDEX strings up there, from previous failed attempts at getting it working (I just REM'ed them out at the moment).

Now, in theory, this should be working - I followed this basic guide to kind of get a feel for what I was doing again - but upon booting, the system spits this out at me:

ATAPI IDE CD-ROM device driver version V 0.01 (04/13/1994) 1 drive(s) detected unit 1, MASTER, IRQ 15, I/O address 0x0170 [...mo […]
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ATAPI IDE CD-ROM device driver version V 0.01 (04/13/1994)
1 drive(s) detected
unit 1, MASTER, IRQ 15, I/O address 0x0170
[...mouse driver stuff...]
Device driver not found: 'MSCD0001'.
No valid CDROM device drivers selected

Now, somehow I'm gathering from this that I can't just call the CDROM device anything I want (i.e. I'm supposed to put some specific thing into autoexec/config other than MSCD0001). This machine does have Windows 3.11 installed on it, if that's of any consequence.