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;* ReadCharAttr - Reads character and display attribute at cursor location.
;*
;* Shows:   BIOS Interrupt - 10h, Function 8 (Read Character and Attribute
;*                           at Cursor)
;*
;* Uses:    vconfig - Video configuration structure, declared in the
;*          DEMO.INC include file. The structure must first be
;*          initialized by calling the GetVidConfig procedure.
;*
;* Params:  attr - Pointer to short integer for display attribute
;*
;* Return:  Short integer with ASCII value of character
 
ReadCharAttr PROC \
        USES di, \
        attr:PTR WORD
 
        mov     ah, 8                   ; Function 8
        mov     bh, vconfig.dpage       ; Current page
        int     10h                     ; Read Character and Attribute
        sub     bh, bh
        mov     bl, ah                  ; BX = attribute
        cbw                             ; AX = character
        LoadPtr es, di, attr            ; ES:DI = pointer to int
        mov     es:[di], bx             ; Copy attribute
        ret
 
ReadCharAttr ENDP
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