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Reworked CPU instruction segment limit and page fault checking a bit, fixes #406;

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Implemented the MCA enable/disable bit for the MCA WD NIC's, fixes #407;
A small bug fix in dma.c.
This commit is contained in:
OBattler
2019-09-21 03:33:05 +02:00
parent 5a4f81d538
commit e65e11fe9a
12 changed files with 109 additions and 192 deletions
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45
src/dma.c
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@@ -1,40 +1,22 @@
/*
* VARCem Virtual ARchaeological Computer EMulator.
* An emulator of (mostly) x86-based PC systems and devices,
* using the ISA,EISA,VLB,MCA and PCI system buses, roughly
* spanning the era between 1981 and 1995.
* 86Box A hypervisor and IBM PC system emulator that specializes in
* running old operating systems and software designed for IBM
* PC systems and compatibles from 1981 through fairly recent
* system designs based on the PCI bus.
*
* This file is part of the VARCem Project.
* This file is part of the 86Box distribution.
*
* Implementation of the Intel DMA controllers.
*
* Version: @(#)dma.c 1.0.5 2019/02/07
* Version: @(#)dma.c 1.0.6 2019/09/21
*
* Authors: Fred N. van Kempen, <decwiz@yahoo.com>
* Authors: Sarah Walker, <tommowalker@tommowalker.co.uk>
* Miran Grca, <mgrca8@gmail.com>
* Sarah Walker, <tommowalker@tommowalker.co.uk>
* Fred N. van Kempen, <decwiz@yahoo.com>
*
* Copyright 2017,2018 Fred N. van Kempen.
* Copyright 2016-2018 Miran Grca.
* Copyright 2008-2018 Sarah Walker.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the:
*
* Free Software Foundation, Inc.
* 59 Temple Place - Suite 330
* Boston, MA 02111-1307
* USA.
* Copyright 2008-2019 Sarah Walker.
* Copyright 2016-2019 Miran Grca.
* Copyright 2017-2019 Fred N. van Kempen.
*/
#include <stdio.h>
#include <stdint.h>
@@ -945,10 +927,7 @@ dma_ps2_run(int channel)
int
dma_mode(int channel)
{
if (channel < 4)
return(dma[channel].mode);
else
return(dma[channel & 3].mode);
return(dma[channel].mode);
}