MCGA支持4位颜色深度,即16种颜色。但是当我尝试打印所有这些颜色时,我只得到它们中的前8个,其余8个简单地复制它们,如下图所示。可能是我在这里做错了,或者全是因为DOSBox?
代码(MASM,在DOSBox 0.74下):
TITLE PROGRAM193
;----------------------------------------------------------
.MODEL SMALL
.STACK 64
.DATA
;----------------------------------------------------------
.CODE
MAIN PROC FAR
MOV AX, @DATA
MOV DS, AX
MOV AX, 0600h ;AH = 06h (scroll up window)
; black (0)
MOV BH, 0Fh ;0 (black) background, F (white) text
MOV CX, 0000h ;upper line, left column
MOV DX, 004Fh ;finishing line, right column
INT 10h
; blue (1)
MOV BH, 1Fh
MOV CX, 0100h
MOV DX, 014Fh
INT 10h
; green (2)
MOV BH, 2Fh
MOV CX, 0200h
MOV DX, 024Fh
INT 10h
; cyan (3)
MOV BH, 3Fh
MOV CX, 0300h
MOV DX, 034Fh
INT 10h
; red (4)
MOV BH, 4Fh
MOV CX, 0400h
MOV DX, 044Fh
INT 10h
; magenta (5)
MOV BH, 5Fh
MOV CX, 0500h
MOV DX, 054Fh
INT 10h
; brown (6)
MOV BH, 6Fh
MOV CX, 0600h
MOV DX, 064Fh
INT 10h
; light gray (7)
MOV BH, 7Fh
MOV CX, 0700h
MOV DX, 074Fh
INT 10h
; -------------------------------
; | The problem starts up here... |
; -------------------------------
; dark gray (8)
MOV BH, 8Fh
MOV CX, 0800h
MOV DX, 084Fh
INT 10h
; light blue (9)
MOV BH, 9Fh
MOV CX, 0900h
MOV DX, 094Fh
INT 10h
; light green (A)
MOV BH, 0AFh
MOV CX, 0A00h
MOV DX, 0A4Fh
INT 10h
; light cyan (B)
MOV BH, 0BFh
MOV CX, 0B00h
MOV DX, 0B4Fh
INT 10h
; light red (C)
MOV BH, 0CFh
MOV CX, 0C00h
MOV DX, 0C4Fh
INT 10h
; light magenta (D)
MOV BH, 0DFh
MOV CX, 0D00h
MOV DX, 0D4Fh
INT 10h
; yellow (E)
MOV BH, 0EFh
MOV CX, 0E00h
MOV DX, 0E4Fh
INT 10h
; white (F)
MOV BH, 0F1h
MOV CX, 0F00h
MOV DX, 0F4Fh
INT 10h
MOV AX, 4C00h
INT 21h
MAIN ENDP
END MAIN
答案 0 :(得分:7)
默认情况下,文本有16种颜色,背景只有8种颜色。
有一种方法可以获得背景的所有16种颜色,这需要关闭“闪烁属性”。
以下是如何做到的:
MAIN PROC FAR
MOV AX, @DATA
MOV DS, AX
; turn-off blinking attribute
MOV AX, 1003h
MOV BL, 00
INT 10h
MOV AX, 0600h ;AH = 06h (scroll up window)
; black (0)
MOV BH, 0Fh ;0 (black) background, F (white) text
MOV CX, 0000h ;upper line, left column
MOV DX, 004Fh ;finishing line, right column
INT 10h
; the rest of the magic...
结果如下所示:
答案 1 :(得分:4)
前景中有16种颜色,但背景只有8种颜色。最高位用于闪烁,有时没有实现。