> driver for IDE controllers using the SMC 73661(2) chipset
> Enables use of 2.88 floppies on system without bios support
> Enables use of 3rd and 4th floppies on 4-floppy controllers


The 4FDC.com program usage:
4FDC [/a:type] [/b:type] [/c:type] [/d:type]
The drive type "TYPE" may be one of the followings:
TYPE := 0       for     NONE drive
     := 3[60K]  for     360K drive
     := 7[20K]  for     720K drive
     := 12[20K] for     1.2M drive
     := 14[40K] for     1.44M drive
     := 2[880K] for     2.88M drive
The braket [ ] are used for characters that can be omited.

To install 4 FDD drivers, you also need to setup CONFIG.SYS with following
settings:

        device=c:\dos\driver.sys /d:?/f:?/s:?/t:?/h:?

which:

d:0     => fdd driver 1
d:1     => fdd driver 2
d:2     => fdd driver 3
d:3     => fdd driver 4

f:0     => below 360KB/5.25"
f:1     => 1.2MB/5.25"
f:2     => 720KB/3.5"
f:7     => 1.44MB/3.5"
f:9     => 2.88MB/3.5"

s:9     => 360KB or 720KB
s:15    => 1.2MB
s:18    => 1.44MB or 2.88MB

t:40    => 360KB
t:80    => 1.2MB or 1.44MB
t:160   => 2.88MB

h:2     => 2 heads

Example:
        If the DOS command "driver.sys" in the "c:\dos\" sub-directory
        and you would like to install:
                                        FDD 1 for 1.2MB/5.25"
                                        FDD 2 for 1.44MB/3.5"
                                        FDD 3 for 2.88MB/3.5"
                                        FDD 4 for 1.2MB/5.25"

        Then, in the CONFIG.SYS file, you should to setup as follows:

        device=c:\dos\driver.sys /d:0/f:1/s:15/t:80/h:2
        device=c:\dos\driver.sys /d:1/f:7/s:18/t:80/h:2
        device=c:\dos\driver.sys /d:2/f:9/s:18/t:160/h:2
        device=c:\dos\driver.sys /d:3/f:1/s:15/t:80/h:2

        also, you should to add:

                                  4FDC /a:12/b:14/c:2/d:12

        into the AUTOEXEC.BAT file for auto setting while PC booting.



EMM386 PARAMETER NOTE:

If you shall use emm386.exe from DOS 5.0 , please add the following option.

/D=32

The default dos DMA buffer = 16 KB is too small for 4M driver.
The track size of 4M drive is equal to 36 sectors (18K).