Q59006: How to Distinguish Between a Standard and Enhanced Keyboard
Article: Q59006 Product(s): See article Version(s): 4.00 4.00b 4.50 Operating System(s): MS-DOS Keyword(s): ENDUSER | B_BasicCom | mspl13_basic Last Modified: 26-FEB-1990 The following code example demonstrates calling interrupts to determine whether an enhanced or standard keyboard is connected to your machine. This example applies to Microsoft QuickBASIC Versions 4.00, 4.00b, and 4.50, to Microsoft BASIC Compiler Versions 6.00 and 6.00b, and to Microsoft BASIC Professional Development System (PDS) Version 7.00 under MS-DOS. (The information about the interrupt 16 Hex, with Functions 2 and 12 Hex, also applies to any language that can call BIOS interrupts.) The information for the interrupts was taken from Pages 581-586 of the book "Advanced MS-DOS Programming, Second Edition," by Ray Duncan, (Microsoft Press, 1988). This information can also be found on Pages 105-112 of the "Programmer's Quick Reference Series: IBM ROM BIOS," by Ray Duncan (Microsoft Press, 1988). The information about the address for the PEEK statement was taken from Pages 137 and 138 of the book "The New Peter Norton Programmer's Guide to the IBM PC and PS/2," by Peter Norton and Richard Wilton, (Microsoft Press, 1988). To compile and link the program in QuickBASIC 4.50, do the following: BC Keytest.bas ; LINK Keytest,,,BRUN45.LIB+QB.LIB ; Code Example ------------ REM $INCLUDE: 'qb.bi' ' Change to qbx.bi for BASIC PDS Version 7.00 DIM inregs AS regtype, outregs AS regtype CLS inregs.ax = &H1200 CALL interrupt(&H16, inregs, outregs) key2% = outregs.ax DEF SEG = &H40 test% = PEEK(&H17) DEF SEG LOCATE 13, 23 IF key2% <> test% THEN PRINT "You have a Standard Keyboard" IF key2% = test% THEN PRINT "You have an Enhanced Keyboard" LOCATE 25, 20 PRINT "Hit a key to end test" SLEEP CLS END
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