mirror of https://github.com/nmlgc/ReC98.git
78 lines
1.1 KiB
NASM
78 lines
1.1 KiB
NASM
; master library - PC98
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;
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; Description:
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; グラフィック画面を 200lineに設定する
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;
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; Function/Procedures:
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; void graph_200line( int tail ) ;
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;
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; Parameters:
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; int tail 0 = 上半分、 1 = 下半分
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;
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; Returns:
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; none
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;
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; Binding Target:
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; Microsoft-C / Turbo-C / Turbo Pascal
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;
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; Running Target:
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; PC-9801
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;
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; Requiring Resources:
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; CPU: 8086
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;
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; Notes:
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; 同時にアクセスページを 0 に設定します。
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;
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; Compiler/Assembler:
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; TASM 3.0
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; OPTASM 1.6
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;
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; Author:
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; 恋塚昭彦
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;
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; Revision History:
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; 92/11/16 Initial
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; 93/ 3/27 gc_poly.lib合併
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; 94/ 1/22 [M0.22] graph_VramZoom対応
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func GRAPH_200LINE
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mov BX,SP
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mov BX,SS:[BX+RETSIZE*2]
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mov CX,BX
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ror CX,1
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cmc
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rcr CX,1
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mov AH,42h
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int 18h
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mov AL,8 ; 高密度
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out 68h,AL
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mov AX,0a800h
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or BX,BX
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jz short @@SKIP
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mov AX,0abe8h
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@@SKIP:
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mov graph_VramSeg,AX
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mov ClipYT_Seg,AX
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mov AX,0
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mov ClipXL,AX
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mov ClipYT,AX
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mov AX,639
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mov ClipXR,AX
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mov ClipXW,AX
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mov graph_VramWords,8000
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mov AX,200
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mov graph_VramLines,AX
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dec AX
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mov ClipYB,AX
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mov ClipYH,AX
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mov ClipYB_adr,(80*199)
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mov graph_VramZoom,1 ; GDC 2.5MHz固定, zoom 1bit(2倍)
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ret 2
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endfunc
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