IOCTL: Add int21/4408 is drive removable

[andrewbird]

I have added a test to the dosemu2 test suite for int21/4408 (is drive removable). Here are the results for

MS-DOS 6.22	FreeDOS with this patch
C:>REM - FAT16	C:>REM - FAT16
C:>C:\drvremov d:	C:>C:\drvremov d:
Drive D: fixed	Drive D: fixed
C:>REM - MFS network	C:>REM - MFS network
C:>C:\drvremov C:	C:>C:\drvremov C:
Drive C: ERROR: 0x0001	Drive C: ERROR: 0x0001
C:>REM - FAT12 floppy	C:>REM - FAT12 floppy
C:>C:\drvremov A:	C:>C:\drvremov A:
Drive A: removable	Drive A: removable
C:>REM - phantom floppy	C:>REM - phantom floppy
C:>C:\drvremov B:	C:>C:\drvremov B:
Drive B: removable	Drive B: removable
C:>REM - non existent device	C:>REM - non existent device
C:>C:\drvremov X:	C:>C:\drvremov X:
Drive X: ERROR: 0x000f	Drive X: ERROR: 0x000f

With the same drive setup as above (A: floppy, B:phantom floppy, C:MFS remote/network, D: FAT16 image) I didn't get the result (fixed/removable status) I expected from Jerome's drvdiag program regarding floppies [see #227] , but seeing as the results above are identical to MS-DOS 6.22, I don't see what's wrong.

C:\>drvdiag
DrvUtils (2021-08-26)
(a programmer's disk diagnostic utility, work in progress)

INT 11          Floppy Present: TRUE
MEM 0040:0075   Total Fixed Drives: 0x05
INT 13,08       Drive 0x00: TRUE
                type: 1.44M, 0x04 [00700x011E]
                drives: 0x01
                0x01 heads, 0x12 sectors, 0x004F cylinders
INT 13,08       Drive 0x01: BIOS Error #1: invalid request to controller
INT 13,08       Drive 0x02: BIOS Error #1: invalid request to controller
INT 13,08       Drive 0x80: TRUE
                drives: 0x05
                0x03 heads, 0x11 sectors, 0x0131 cylinders
INT 13,08       Drive 0x81: TRUE
                drives: 0x05
                0x07 heads, 0x20 sectors, 0x0145 cylinders
INT 13,08       Drive 0x82: TRUE
                drives: 0x05
                0xFE heads, 0x3F sectors, 0x00FE cylinders
INT 13,08       Drive 0x83: TRUE
                drives: 0x05
                0xFE heads, 0x3F sectors, 0x00FE cylinders
INT 13,08       Drive 0x84: TRUE
                drives: 0x05
                0xFE heads, 0x3F sectors, 0x00FE cylinders
INT 13,08       Drive 0x85: BIOS Error #1: invalid request to controller

Drive A:
INT 21,4408     Removable: false
INT 21,4409     Remote flags: none 
Drive C:
INT 21,4408     Removable: DOS Error #1: invalid function number
INT 21,4409     Remote flags: 0x1000 Is Remote 
Drive D:
INT 21,4408     Removable: false
INT 21,4409     Remote flags: none 
Drive E:
INT 21,4408     Removable: DOS Error #1: invalid function number
INT 21,4409     Remote flags: 0x1000 Is Remote 
Drive F:
INT 21,4408     Removable: DOS Error #1: invalid function number
INT 21,4409     Remote flags: 0x1000 Is Remote 
Drive G:
INT 21,4408     Removable: DOS Error #1: invalid function number
INT 21,4409     Remote flags: 0x1000 Is Remote 
Drive H:
INT 21,4408     Removable: DOS Error #15: invalid drive
INT 21,4409     Remote flags: DOS Error #15: invalid drive 
Drive I:
INT 21,4408     Removable: DOS Error #15: invalid drive
INT 21,4409     Remote flags: DOS Error #15: invalid drive 
Drive J:
INT 21,4408     Removable: DOS Error #15: invalid drive
INT 21,4409     Remote flags: DOS Error #15: invalid drive 
Drive K:
INT 21,4408     Removable: DOS Error #15: invalid drive
INT 21,4409     Remote flags: DOS Error #15: invalid drive 
Drive L:
INT 21,4408     Removable: DOS Error #15: invalid drive
INT 21,4409     Remote flags: DOS Error #15: invalid drive 
Drive M:
INT 21,4408     Removable: DOS Error #15: invalid drive
INT 21,4409     Remote flags: DOS Error #15: invalid drive 
Drive N:
INT 21,4408     Removable: DOS Error #15: invalid drive
INT 21,4409     Remote flags: DOS Error #15: invalid drive 
Drive O:
INT 21,4408     Removable: DOS Error #15: invalid drive
INT 21,4409     Remote flags: DOS Error #15: invalid drive 
Drive P:
INT 21,4408     Removable: DOS Error #15: invalid drive
INT 21,4409     Remote flags: DOS Error #15: invalid drive 
Drive Q:
INT 21,4408     Removable: DOS Error #15: invalid drive
INT 21,4409     Remote flags: DOS Error #15: invalid drive 
Drive R:
INT 21,4408     Removable: DOS Error #15: invalid drive
INT 21,4409     Remote flags: DOS Error #15: invalid drive 
Drive S:
INT 21,4408     Removable: DOS Error #15: invalid drive
INT 21,4409     Remote flags: DOS Error #15: invalid drive 
Drive T:
INT 21,4408     Removable: DOS Error #15: invalid drive
INT 21,4409     Remote flags: DOS Error #15: invalid drive 
Drive U:
INT 21,4408     Removable: DOS Error #15: invalid drive
INT 21,4409     Remote flags: DOS Error #15: invalid drive 
Drive V:
INT 21,4408     Removable: DOS Error #15: invalid drive
INT 21,4409     Remote flags: DOS Error #15: invalid drive 
Drive W:
INT 21,4408     Removable: DOS Error #15: invalid drive
INT 21,4409     Remote flags: DOS Error #15: invalid drive 
Drive X:
INT 21,4408     Removable: DOS Error #15: invalid drive
INT 21,4409     Remote flags: DOS Error #15: invalid drive 
Drive Y:
INT 21,4408     Removable: DOS Error #15: invalid drive
INT 21,4409     Remote flags: DOS Error #15: invalid drive 
Drive Z:
INT 21,4408     Removable: DOS Error #15: invalid drive
INT 21,4409     Remote flags: DOS Error #15: invalid drive 

INT 2F,1500     CD-ROM Drives: not present
Done for now. :-)

[andrewbird]

Edited above results into a table for easier comparison.