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Ported the ISA RTC and Memory expansion cards from VARCem's.

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Bunch of improvements in the device, memory and MMU handling.
Re-worked the NEAT 286 chipset (ported from VARCem).
Re-worked the ATI 28800 a bit, added Sierra SC1502x ramdac to VGA Wonder XL (Compaq) since it supports such.
Top 384K memory handling improvements (256K top memory too)
Added MCA version of MPU-401 (not tested much, however).
Re-worked the SCAT 286 chipset.
This commit is contained in:
TC1995
2018-09-03 13:55:09 +02:00
parent 0e96d5d7a4
commit 0d2ee0a57d
29 changed files with 3605 additions and 422 deletions
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75
src/machine/m_at.c
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@@ -1,3 +1,41 @@
/*
* 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.
*
* This file is part of the VARCem Project.
*
* Standard PC/AT implementation.
*
* Version: @(#)m_at.c 1.0.0 2018/09/02
*
* Authors: Fred N. van Kempen, <decwiz@yahoo.com>
* Miran Grca, <mgrca8@gmail.com>
* Sarah Walker, <tommowalker@tommowalker.co.uk>
*
* 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.
*/
#include <stdio.h>
#include <stdint.h>
#include <string.h>
@@ -46,6 +84,16 @@ machine_at_init(const machine_t *model)
}
void
machine_at_ibm_init(const machine_t *model)
{
machine_at_init(model);
mem_remap_top(384);
device_add(&fdc_at_device);
}
void
machine_at_ps2_init(const machine_t *model)
{
@@ -80,30 +128,3 @@ machine_at_ps2_ide_init(const machine_t *model)
device_add(&ide_isa_2ch_opt_device);
}
void
machine_at_top_remap_init(const machine_t *model)
{
machine_at_init(model);
mem_remap_top_384k();
}
void
machine_at_ide_top_remap_init(const machine_t *model)
{
machine_at_ide_init(model);
mem_remap_top_384k();
}
void
machine_at_ibm_init(const machine_t *model)
{
machine_at_top_remap_init(model);
device_add(&fdc_at_device);
}