| タイトル | ： get true ver (ax=$3306) |
| 投稿日 | ： 2023/01/29(日) 22:34 |
| 投稿者 | ： 文太 | 番 号 | ： 10540 10538 番 文太 さんへのコメント |
面白くない結果でした。
=== Macrotmp by B ===; always returns "true" dos version
* M
50 ^^ "Macrotmp"
ax=$3306, &i($21) ;vtdos returns 6.20 here
&m("MS-DOS v%d.%d",bx&$FF,bx>>8&$FF) ;vtdos returns the ver of
; ax=$3000, &i($21) ;command.com used again.
; &m("MS-DOS v%d.%d",ax&$FF,ax>>8&$FF) ;So made, it seems.
*
-------------------------------------------------------------------
INT 21 - DOS 5+ - GET TRUE VERSION NUMBER
AX = 3306h
Return: BL = major version
BH = minor version
DL = revision (bits 2-0, all others 0)
DH = version flags
bit 3: DOS is in ROM
bit 4: DOS is in HMA
AL = FFh if true DOS version < 5.0
Notes: this function always returns the true version number, unlike AH=30h,
whose return value may be changed with SETVER
because of the conflict from the CBIS redirector (see next
entry), programs should check whether BH is less than 100 (64h)
and BL is at least 5 before accepting the returned BX as the true
version number; however, even this is not entirely reliable when
that redirector is loaded
Under MS-DOS/PC DOS, DR DOS, PTS-DOS, S/DOS this function does not
use any of the DOS internal stacks and thus is fully reentrant
OS/2 v2.1 will return BX=0A14h (version 20.10)
Windows 95 and Windows 95 SP1 return version 7.00; Windows 95 OSR2
and OPK3 (OSR2.5) return version MS 7.10.
the Windows NT DOS box returns BX=3205h (version 5.50)
Novell DOS 7 returns IBM v6.00, which some software displays as
IBM DOS v6.10 (because of the version mismatch in true IBM DOS
mentioned for INT 21/AH=30h); versions through Update 15 all
return revision code 00h
-------------------------------------------------------------------
--------N-213306-----------------------------; NEVER MIND
INT 21 - CBIS network - NETWORK REDIRECTOR - ???
AX = 3306h
Return: AX = 3306h
BL = ??? (usually 00h)
BH = ??? (usually 00h or FFh)
Note: unknown function, is in conflict with DOS 5+ version call
SeeAlso: AX=3306h"DOS"
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