Q21839: Support for IBM EGA and Hercules Graphics Cards
Article: Q21839 Product(s): See article Version(s): 2.00 2.01 3.00 4.00 4.00b 4.50 Operating System(s): MS-DOS Keyword(s): ENDUSER | B_BasicCom | mspl13_basic Last Modified: 29-DEC-1989 This article describes which versions of QuickBASIC support the IBM EGA (Enhanced Graphics Adapter) Card and which versions support Hercules Monochrome Graphics Cards. EGA Support ----------- QuickBASIC Versions 2.00, 2.01, 3.00, 4.00, 4.00b, and 4.50 support EGA through the use of SCREEN modes 7, 8, 9, and 10. QuickBASIC Versions 1.00, 1.01, and 1.02 do not support the EGA. The 43-line EGA mode is supported in the Editor and in the WIDTH statement in QuickBASIC Versions 3.00, 4.00, 4.00b, and 4.50. The EGA is also supported in OS/2 real mode and MS-DOS for programs compiled with Microsoft BASIC Compiler Versions 6.00 and 6.00b for MS-DOS and MS OS/2, and Microsoft BASIC PDS Version 7.00. The EGA is not currently supported for BASIC programs that run in OS/2 protected mode. Hercules Support ---------------- Microsoft QuickBASIC Versions 4.00 and later, the Microsoft BASIC Compiler 6.00 and 6.00B, and Microsoft BASIC PDS 7.00 all support the Hercules Monochrome Graphics Card, Hercules Graphics Card Plus, Hercules InColor Card, and cards that are 100 percent compatible with these cards. The following describes how Hercules cards are supported in QuickBASIC: 1. Hercules graphics mode is SCREEN 3. 2. Hercules text mode is SCREEN 0. 3. With Hercules, you must use a monochrome monitor. 4. You must load the Hercules driver (QBHERC.COM) before running your program. If the driver is not loaded, the SCREEN 3 statement gives an "Illegal function call" error message. Type "QBHERC" to load the driver. 5. The text dimensions are 80x25 (9x14 character box); the bottom two scan lines of the 25th row are not visible. 6. The resolution is 720x348 pixels, monochrome. 7. SCREEN 3 supports two pages (0 and 1); SCREEN 0 used with Hercules supports only one page. 8. The PALETTE statement is not supported. 9. To make function calls to the Microsoft Mouse, you must follow special instructions for Hercules cards in the "Microsoft Mouse Programmer's Reference Guide." (This manual must be ordered separately; it is not supplied with either the QuickBASIC or the Microsoft Mouse packages.) The use of Hercules cards is also documented in the README.DOC file on the QuickBASIC Version 4.00, 4.00b, and 4.50 release disk, which supplements the Microsoft QuickBASIC Compiler documentation.
THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY.
Copyright Microsoft Corporation 1986-2002.