0faf6692c9
Changes to device_t struct to accomodate the upcoming PCI IRQ arbitration rewrite; Added device.c/h API to obtain name from the device_t struct; Significant changes to win/win_settings.c to clean up the code a bit and fix bugs; Ported all the CPU and AudioPCI commits from PCem; Added an API call to allow ACPI soft power off to gracefully stop the emulator; Removed the Siemens PCD-2L from the Dev branch because it now works; Removed the Socket 5 HP Vectra from the Dev branch because it now works; Fixed the Compaq Presario and the Micronics Spitfire; Give the IBM PC330 its own list of 486 CPU so it can have DX2's with CPUID 0x470; SMM fixes; Rewrote the SYSENTER, SYSEXIT, SYSCALL, and SYSRET instructions; Changed IDE reset period to match the specification, fixes #929; The keyboard input and output ports are now forced in front of the queue when read, fixes a number of bugs, including the AMI Apollo hanging on soft reset; Added the Intel AN430TX but Dev branched because it does not work; The network code no longer drops packets if the emulated network card has failed to receive them (eg. when the buffer is full); Changes to PCI card adding and renamed some PCI slot types, also added proper AGP bridge slot types; USB UHCI emulation is no longer a stub (still doesn't fully work, but at least Windows XP chk with Debug no longer ASSERT's on it); Fixed NVR on the the SMC FDC37C932QF and APM variants; A number of fixes to Intel 4x0 chipsets, including fixing every register of the 440LX and 440EX; Some ACPI changes.
169 lines
2.9 KiB
C
169 lines
2.9 KiB
C
/*
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* 86Box A hypervisor and IBM PC system emulator that specializes in
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* running old operating systems and software designed for IBM
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* PC systems and compatibles from 1981 through fairly recent
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* system designs based on the PCI bus.
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*
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* This file is part of the 86Box distribution.
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*
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* Emulation of a AT&T 20c490/491 and 492/493 RAMDAC.
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*
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*
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*
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* Authors: Sarah Walker, <http://pcem-emulator.co.uk/>
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* Miran Grca, <mgrca8@gmail.com>
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*
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* Copyright 2008-2018 Sarah Walker.
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* Copyright 2016-2018 Miran Grca.
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*/
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#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <wchar.h>
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#include <86box/86box.h>
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#include <86box/device.h>
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#include <86box/mem.h>
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#include <86box/timer.h>
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#include <86box/video.h>
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#include <86box/vid_svga.h>
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typedef struct
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{
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int type;
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int state;
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uint8_t ctrl;
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} att49x_ramdac_t;
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enum
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{
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ATT_490_1 = 0,
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ATT_492_3
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};
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void
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att49x_ramdac_out(uint16_t addr, uint8_t val, void *p, svga_t *svga)
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{
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att49x_ramdac_t *ramdac = (att49x_ramdac_t *) p;
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switch (addr) {
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case 0x3C6:
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if (ramdac->state == 4) {
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ramdac->state = 0;
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ramdac->ctrl = val;
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if (ramdac->type == ATT_490_1)
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svga_set_ramdac_type(svga, (val & 2) ? RAMDAC_8BIT : RAMDAC_6BIT);
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switch (val)
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{
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case 0:
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svga->bpp = 8;
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break;
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case 0x20:
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svga->bpp = 15;
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break;
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case 0x40:
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svga->bpp = 24;
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break;
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case 0x60:
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svga->bpp = 16;
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break;
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case 0x80:
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case 0xa0:
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svga->bpp = 15;
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break;
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case 0xc0:
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svga->bpp = 16;
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break;
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case 0xe0:
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svga->bpp = 24;
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break;
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}
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svga_recalctimings(svga);
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return;
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}
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ramdac->state = 0;
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break;
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case 0x3C7:
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case 0x3C8:
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case 0x3C9:
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ramdac->state = 0;
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break;
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}
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svga_out(addr, val, svga);
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}
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uint8_t
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att49x_ramdac_in(uint16_t addr, void *p, svga_t *svga)
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{
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att49x_ramdac_t *ramdac = (att49x_ramdac_t *) p;
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uint8_t temp = svga_in(addr, svga);
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switch (addr) {
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case 0x3C6:
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if (ramdac->state == 4) {
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ramdac->state = 0;
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temp = ramdac->ctrl;
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break;
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}
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ramdac->state++;
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break;
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case 0x3C7:
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case 0x3C8:
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case 0x3C9:
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ramdac->state = 0;
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break;
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}
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return temp;
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}
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static void *
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att49x_ramdac_init(const device_t *info)
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{
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att49x_ramdac_t *ramdac = (att49x_ramdac_t *) malloc(sizeof(att49x_ramdac_t));
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memset(ramdac, 0, sizeof(att49x_ramdac_t));
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ramdac->type = info->local;
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return ramdac;
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}
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static void
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att49x_ramdac_close(void *priv)
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{
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att49x_ramdac_t *ramdac = (att49x_ramdac_t *) priv;
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if (ramdac)
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free(ramdac);
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}
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const device_t att490_ramdac_device =
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{
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"AT&T 20c490/20c491 RAMDAC",
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0, ATT_490_1,
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att49x_ramdac_init, att49x_ramdac_close,
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NULL, { NULL }, NULL, NULL
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};
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const device_t att492_ramdac_device =
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{
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"AT&T 20c492/20c493 RAMDAC",
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0, ATT_492_3,
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att49x_ramdac_init, att49x_ramdac_close,
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NULL, { NULL }, NULL, NULL
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};
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