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3.984 bytes |
Service Hints & Tips |
Document ID: YAST-3FTP6E |
Aptiva - Disabling VCPI support
Applicable to: United States
EMM386.EXE version 4.45 provides support for the Virtual Control Program Interface (VCPI) without having to set an expanded memory page frame and without having to specify a VCPI memory pool.
VCPI services are provided by default--no special switches or parameters are required. If you want to disable VCPI support, you must use the NOVCPI switch on the EMM386.EXE command line in the CONFIG.SYS file. Several popular MS-DOS-based applications use DOS extenders to share extended memory and use of the protected mode of 80386 and higher processors through VCPI. VCPI is an extension to the expanded memory services (EMS) interface and is typically implemented by an EMS emulator (such as EMM386.EXE or Quarterdeck's QEMM386.SYS). Without VCPI support, "DOS-extended" applications could not run with systems running in virtual 8086 mode. EMS emulators use virtual 8086 mode to provide expanded memory mapping and/or create upper memory blocks (UMBs).
The MS-DOS 6.0 version of EMM386.EXE (4.45) enables VCPI support without specifying a VCPI size parameter even if the NOEMS switch is active. Any EMM386 device command that does not include the NOVCPI switch provides VCPI services.
With EMM386.EXE version 4.45, VCPI memory is sized using the same parameters as the EMS pool size (EMM386 [memory] and MIN= parameters).
For more information on the EMM386.EXE device driver and the NOVCPI switch, enter: HELP EMM386.EXE at the MS-DOS command prompt.
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Search Keywords |
DOS | |
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Hint Category |
DOS/Windows 3.x | |
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Date Created |
04-04-97 | |
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Last Updated |
23-03-99 | |
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Revision Date |
23-03-2000 | |
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Brand |
IBM Aptiva | |
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Product Family |
Aptiva, PS/1 | |
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Machine Type |
2011, 2144, 2168, 2121, 2123, 2133, 2155 | |
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Model |
C01; C34; M01; NEA; T35; U35; A62; A82; A94; B82; C42; C92; G42; M82; S92; 081; 087; 131; 137; K37; N31; N81; 11E; 13T; 14C; 16E; 17A; 18A; 18T; 19C; 21C; 23C; 28A; 46M; 51D; D50; G11; G13; G43; G46; G46; G49; G49; G50; G53; M40; M40; M46; M46; P11; P13; P43; P50; P53; R04; R05; R06; R09; R38; R42; R43; R44; R84; R86; R87; RO3; S11; S13; S43; S45; S45; S47; S47; S48; S48; S50; S53; W11; W13; W42; W42; W43; W45; W45; W50; W53; 20E; 22T; 24C; 24M; 28V; 39E; 41T; 43C; 45V; 48E; 50T; 52C; 55V; 72E; 74T; 76C; 78C; 79C; 81A; 82E; 84T; 86C; 87C; CC1; D53; G14; G44; G52; G54; G72; G76; G78; G82; NM1; P14; P44; P57; P71; P74; P76; P78; P84; R14; R15; R16; R17; R18; R51; R52; R57; R58; R62; R63; R67; R71; R89; R93; R96; R97; S14; S44; S50; S54; S70; S75; S76; S78; S80; W14; W44; W48; W54; W67; W76; W77; W78; Z33; 28V; 31E; 33T; 37C; 38C; 51E; 54T; 56C; 57C; 88V; BB1; G57; G87; OR1; OR3; OR4; OR5; P89; R28; R29; R31; R74; R78; R82; R98; S55; S85; SR1; US1; W52; W82; 1R2; 66P; 67P; 86P; OR8; 1R1; 1R3; 1R5; 22P; 24P; 25P; 27P; 29P; 63P; 67P; 82P; 83P; OR6; OR7; OR9; 1R0; 1R1; 26P; 62P; 2R0; P30; 2R3; S15 | |
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TypeModel |
2011r44 | |
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