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Copyright 1991 David Jurgens |
Device Command Codes (Device Request Header)
Code Function
0 INIT
1 MEDIA CHECK (block devices,character = NOP)
2 BUILD BPB (block devices,character = NOP)
3 IOCTL
4 INPUT (read)
5 NONDESTRUCTIVE INPUT NO WAIT (character devices)
6 INPUT STATUS (character devices)
7 INPUT FLUSH (character devices)
8 OUTPUT (write)
9 OUTPUT (write with verify)
10 OUTPUT STATUS (character devices)
11 OUTPUT FLUSH (character devices)
12 IOCTL OUTPUT
13 DEVICE OPEN (DOS 3.x)
14 DEVICE CLOSE (DOS 3.x)
15 REMOVABLE MEDIA (DOS 3.x)
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| Esc or Alt-X to exit |
device command codes |
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