9f960e405f
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@11056 a1c6a512-1295-4272-9138-f99709370657
79 lines
2.1 KiB
C
79 lines
2.1 KiB
C
/*
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* Copyright (C) 1996-1998 Szeredi Miklos
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* Email: mszeredi@inf.bme.hu
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version. See the file COPYING.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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#include "z80.h"
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#include "spperif.h"
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#include "spscr.h"
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#define SOUNDPORT 0x10
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int SPNM(halfframe)(int firsttick, int numlines)
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{
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int tc, linesleft;
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int feport, scline, border = 0;
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byte *scrptr;
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qbyte cmark = 0;
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scrptr = (byte *) SPNM(image);
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tc = firsttick - CHKTICK;
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for(linesleft = numlines; linesleft; linesleft--) {
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DANM(next_scri) = SPNM(scri)[SPNM(scline)];
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tc += CHKTICK;
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tc = PRNM(step)(tc);
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scline = SPNM(scline);
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/* store sound */
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SPNM(sound_buf)[scline] = DANM(sound_sam);
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feport = DANM(ula_outport);
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if(feport & SOUNDPORT) DANM(sound_sam) = 240;
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else DANM(sound_sam) = 16;
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/* change EAR bit, store MIC bit*/
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SPNM(fe_outport_time)[scline] = feport;
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if(DANM(imp_change)) DANM(ula_inport) ^= 0x40;
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DANM(imp_change) = SPNM(tape_impinfo)[scline];
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/* Check if updating screen */
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if(SPNM(updating)) {
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#if LCD_WIDTH == 320 && ( LCD_HEIGHT == 240 || LCD_HEIGHT == 200 )
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border = SPNM(lastborder);
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if((feport & 0x07) != border) {
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SPNM(border_update) = 2;
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SPNM(lastborder) = feport & 0x07;
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}
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#else
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SPNM(border_update) = 0;
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#endif
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scrptr = update_screen_line(scrptr, SPNM(coli)[scline], DANM(next_scri),
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border, &cmark);
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}
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SPNM(scline)++;
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}
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return tc;
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}
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