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1/*
2 SCRNEMDV.c
3
4 Copyright (C) 2006 Philip Cummins, Richard F. Bannister,
5 Paul C. Pratt
6
7 You can redistribute this file and/or modify it under the terms
8 of version 2 of the GNU General Public License as published by
9 the Free Software Foundation. You should have received a copy
10 of the license along with this file; see the file COPYING.
11
12 This file is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 license for more details.
16*/
17
18/*
19 SCReeN EMulated DeVice
20
21 Emulation of the screen in the Mac Plus.
22
23 This code descended from "Screen-MacOS.c" in Richard F. Bannister's
24 Macintosh port of vMac, by Philip Cummins.
25*/
26
27#include "PICOMMON.h"
28
29#include "SCRNEMDV.h"
30
31#if ! IncludeVidMem
32#define kMain_Offset 0x5900
33#define kAlternate_Offset 0xD900
34#define kMain_Buffer (kRAM_Size - kMain_Offset)
35#define kAlternate_Buffer (kRAM_Size - kAlternate_Offset)
36#endif
37
38GLOBALPROC Screen_EndTickNotify(void)
39{
40 ui3p screencurrentbuff;
41
42#if IncludeVidMem
43 screencurrentbuff = VidMem;
44#else
45 if (SCRNvPage2 == 1) {
46 screencurrentbuff = get_ram_address(kMain_Buffer);
47 } else {
48 screencurrentbuff = get_ram_address(kAlternate_Buffer);
49 }
50#endif
51
52 Screen_OutputFrame(screencurrentbuff);
53}