mirror of
https://github.com/joncampbell123/dosbox-x.git
synced 2025-05-07 18:36:09 +08:00
d8d28858a1
Restrict S3 LFB to just below BIOS, do not let the 32MB region overlap the BIOS. Limit Voodoo 3Dfx framebuffer to stay out of system RAM. To prevent large memsize configurations that cause S3 and 3Dfx to conflict, add a hardware assignment system to give each device it's own assigned LFB region of memory. This really only has an effect when space gets cramped with large mem sizes, otherwise it has no effect. Perhaps someday the BIOS should assign the 3Dfx, S3, and any other PCI devices their resources like a real PC system would.
48 lines
1.6 KiB
C
48 lines
1.6 KiB
C
/*
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* Copyright (C) 2002-2021 The DOSBox Team
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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.
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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 along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#ifndef DOSBOX_VOODOO_H
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#define DOSBOX_VOODOO_H
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#define VOODOO_INITIAL_LFB 0xd0000000
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#define VOODOO_LFB_SIZE 0x01000000 /* VOODOO_PAGES == 4096 (4096 << 12) 16MB size must be a power of 2 */
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#define VOODOO_LFB_ALIGNMASK ( ~(VOODOO_LFB_SIZE - 1u) ) /* 16MB align */
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#define VOODOO_REG_PAGES 1024
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#define VOODOO_LFB_PAGES 1024
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#define VOODOO_TEX_PAGES 2048
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#define VOODOO_PAGES (VOODOO_REG_PAGES+VOODOO_LFB_PAGES+VOODOO_TEX_PAGES)
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static_assert( VOODOO_LFB_ALIGNMASK == 0xFF000000ul, "Voodoo LFB error" );
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#define VOODOO_EMU_TYPE_OFF 0
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#define VOODOO_EMU_TYPE_SOFTWARE 1
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#define VOODOO_EMU_TYPE_ACCELERATED 2
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void VOODOO_PCI_InitEnable(Bitu val);
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void VOODOO_PCI_Enable(bool enable);
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void VOODOO_PCI_SetLFB(uint32_t lfbaddr);
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bool VOODOO_PCI_CheckLFBPage(Bitu page);
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bool Voodoo_OGL_Active();
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void Voodoo_Output_Enable(bool enabled);
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PageHandler* VOODOO_GetPageHandler();
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#endif
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