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Merged
shidel merged 2 commits into from
Apr 14, 2026
Merged

ecm 2026-04m #60

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3e80e7d
21.6C: note bit 0 DH and AL allowed any values, suggest CF set
ecm-pushbx Apr 14, 2026
9f36a7b
change references with name "EMM386(.EXE)" to "Microsoft EMM386"
ecm-pushbx Apr 14, 2026
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3 changes: 2 additions & 1 deletion ...upt List/INT 21 DOS Function Calls/INT 214402SF00 Memory Managers GET API ENTRY POINT.txt
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Expand Up @@ -21,7 +21,8 @@ Notes: this function is supported by Microsoft EMM386.EXE v4.45+ and
"COMPAQ EXPANDED MEMORY MANAGER 386" at offset 14h in the INT 67
handler's segment; if present, the word at offset 12h contains the
offset of the API entry point
SeeAlso: AX=4402h/SF=01h,AX=4402h/SF=02h,AX=4402h"EMM386",INT 67/AH=3Fh
SeeAlso: AX=4402h/SF=01h,AX=4402h/SF=02h,AX=4402h"Microsoft EMM386"
SeeAlso: INT 67/AH=3Fh

Format of memory manager API entry point record:
Offset Size Description (Table 01512)
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2 changes: 1 addition & 1 deletion ...21 DOS Function Calls/INT 214402SF01 Memory Managers GET EMM IMPORT STRUCTURE ADDRESS.txt
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Expand Up @@ -19,7 +19,7 @@ Notes: this function is supported by Microsoft EMM386.EXE v4.45+,
as it starts up
for QEMM-386, this call always returns an error if Windows3 support
has been disabled with the NW3 switch
SeeAlso: AX=4402h/SF=00h,AX=4402h"EMM386",INT 2F/AX=D201h/BX=5145h
SeeAlso: AX=4402h/SF=00h,AX=4402h"Microsoft EMM386",INT 2F/AX=D201h/BX=5145h
SeeAlso: INT 67/AH=3Fh

Format of EMM import structure record:
Expand Down
2 changes: 1 addition & 1 deletion ...t/INT 21 DOS Function Calls/INT 214402SF02 Memory Managers GET MEMORY MANAGER VERSION.txt
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Expand Up @@ -16,7 +16,7 @@ Return: CF clear if successful
AX = error code (01h,05h,06h,0Dh) (see #01680 at AH=59h/BX=0000h)
Note: this function is supported by Microsoft EMM386.EXE v4.45+ and
CEMM v5.10+, and is intended for use by MS Windows as it starts up
SeeAlso: AX=4402h/SF=00h,AX=4402h"EMM386",INT 67/AH=3Fh
SeeAlso: AX=4402h/SF=00h,AX=4402h"Microsoft EMM386",INT 67/AH=3Fh

Format of memory manager version:
Offset Size Description (Table 01520)
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5 changes: 4 additions & 1 deletion source/Interrupt List/INT 21 DOS Function Calls/INT 216C00 DOS 40 EXTENDED OPENCREATE.txt
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Expand Up @@ -20,6 +20,7 @@ INT 21 - DOS 4.0+ - EXTENDED OPEN/CREATE
DL = action if file exists/does not exist (see #01770)
DH = 00h (reserved)
DS:SI -> ASCIZ file name
CF should be set on entry for better compatibility
Return: CF set on error
AX = error code (see #01680 at AH=59h/BX=0000h)
CF unchanged, AL = 00h as DOS v1 style error (AX = 6C00h)
Expand All @@ -39,6 +40,9 @@ Notes: the PC LAN Program only supports existence actions (in DL) of 01h,
DOS v1 style error sets AL = 00h (thus AX = 6C00h) but leaves CF
unchanged so it is good practice to initialise CF set before the
int 21h call
MS-DOS v4.01 and lDOS accept bit 0 in DH set, all other bits must be
zero or an error 0001h is generated
MS-DOS v4.01 and lDOS accept any value in AL
BUG: this function has bugs (at least in DOS 5.0 and 6.2) when used with
drives handled via the network redirector (INT 2F/AX=112Eh):
- CX (attribute) is not passed to the redirector if DL=11h,
Expand Down Expand Up @@ -72,4 +76,3 @@ Bit(s) Description (Table 01770)
0000 fail
0001 open
0010 replace/open

4 changes: 2 additions & 2 deletions ...rupt LIM EMS multiple purposes/INT 67FFA5 Microsoft EMM386EXE v420 INSTALLATION CHECK.txt
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Expand Up @@ -15,7 +15,7 @@ Notes: this call is available even if EMM386 is not providing EMS
"MICROSOFT EXPANDED MEMORY MANAGER 386" at offset 14h in the INT 67
handler's segment; the word immediately preceding this string
contains the offset of the API entry point
SeeAlso: AH=3Fh,AX=FFA5h/BX=4345h,INT 21/AX=4402h"EMM386.EXE"
SeeAlso: AH=3Fh,AX=FFA5h/BX=4345h,INT 21/AX=4402h"Microsoft EMM386"

(Table 03666)
Call EMM386.EXE API entry point with:
Expand All @@ -41,4 +41,4 @@ Call EMM386.EXE API entry point with:
AH = 05h print available report
(the one shown when running EMM386 from the DOS prompt)
SeeAlso: #01513 at INT 21/AX=4402h/SF=02h,#02617 at INT 2F/AX=12FFh/BX=0106h

4 changes: 2 additions & 2 deletions ...ser interrupt LIM EMS multiple purposes/INT 67FFA5BX4345 Compaq CEMM v510 PRIVATE API.txt
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Expand Up @@ -20,6 +20,6 @@ INT 67 U - Compaq CEMM v5.10+ - PRIVATE API
Return: AH = 84h
AL = status (84h = error, FFh = success)
Note: if BX <> 4345h or DX > 0004h on entry, CEMM behaves identically to
Microsoft's EMM386 (see AX=FFA5h"EMM386")
SeeAlso: AX=FFA5h"EMM386",#01513 at INT 21/AX=4402h/SF=02h,#03666
Microsoft's EMM386 (see AX=FFA5h"Microsoft EMM386")
SeeAlso: AX=FFA5h"Microsoft EMM386",#01513 at INT 21/AX=4402h/SF=02h,#03666