mirror of https://github.com/nmlgc/ReC98.git
96 lines
1.6 KiB
NASM
96 lines
1.6 KiB
NASM
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; master library - PC98
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;
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; Description:
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; テキスト画面の長方形範囲を指定属性で埋める
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;
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; Function/Procedures:
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; void text_boxfilla( unsigned x1, unsigned y1, unsigned x2, unsigned y2,
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; unsigned atrb ) ;
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;
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; Parameters:
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; unsigned x1 左端の横座標( 0 〜 79 )
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; unsigned y1 上端の縦座標( 0 〜 24 )
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; unsigned x2 右端の横座標( 0 〜 79 )
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; unsigned y2 下端の縦座標( 0 〜 24 )
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; unsigned atrb 属性
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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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; x1 <= x2 かつ y1 <= y2でなければならない。
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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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; 92/11/15 Initial
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func TEXT_BOXFILLA
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push DI
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pushf
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CLI
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add SP,(2+retsize)*2
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; パラメータ領域の先頭( flags,DI,retadr )
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pop AX ; color
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pop DX ; y2
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pop BX ; x2
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pop CX ; Y1
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mov DI,CX
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shl DI,1
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shl DI,1
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add DI,CX
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shl DI,1
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add DI,TextVramSeg
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add DI,200h
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mov ES,DI ; これで ESに (0,y1)のテキスト属性セグメントが入った
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pop DI ; X1
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sub SP,(5+2+retsize)*2
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; (5(ﾊﾟﾗﾒｰﾀの数)+1(ﾘﾀｰﾝｱﾄﾞﾚｽ)+2(DI,flags))*2
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popf
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sub BX,DI ; BX = X2 - X1 + 1
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inc BX ;
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sub DX,CX
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mov CX,DX
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shl DX,1
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shl DX,1
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add DX,CX
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shl DX,1
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shl DX,1
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shl DX,1
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shl DX,1
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add DI,DX
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shl DI,1 ; これで DI には(x1,y2)のoffsetが入った。
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lea DX,[BX+80]
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shl DX,1 ; 毎回の減少分
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EVEN
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@@SLOOP: mov CX,BX
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rep stosw ; 一行分の書き込み
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sub DI,DX ; 下の行に移動
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jnb short @@SLOOP
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pop DI
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ret 10
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endfunc
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