2ac3d289e6
1. Corrected the ATI 1881x clocks for use with the ATI Mach8/32 and VGA Wonder chips. The CPU slowdowns should now be gone. 2. Merged I/O ports common to both the ATI and IBM 8514/A compatible chips where they have identical code (extended behavior is still separate). Code duplication is now less than before. 3. Fixed a general polygon pattern issue in the Mach8/32 affecting calc.exe in Win3.x and other stuff. 4. Mode changes are, once again, changed (ATI and IBM), as close as possible to the real thing without destroying existing resolutions. 5. The 8514/A Vertical Counter has been extended to 0xfff so that it can take 1280x1024 resolutions well offered by the Mach32 as well as a better way to change the IBM/ATI modes through a callback swap where approprietate. 6. in 8514/A mode, reads from the 0x3c6-0x3c9 ramdac range is redirected to the 8514/A RAMDAC (0x2ea-0x2ed). 7. LFB access in the Mach32 now no longer takes account of the SVGA derived rops. Fixes Mach32 display on NeXTSTEP/OPENSTEP 3.x/4.x 8. Reworked the Display Sense Status and Subsystem Status ports so that they're not copycats from MAME and instead follow the datasheet.
218 lines
6.3 KiB
C
218 lines
6.3 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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* ICS2494 clock generator emulation.
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*
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* Used by the AMI S3 924.
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*
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*
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*
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* Authors: Miran Grca, <mgrca8@gmail.com>
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*
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* Copyright 2020 Miran Grca.
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*/
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#include <stdarg.h>
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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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#define HAVE_STDARG_H
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#include <86box/86box.h>
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#include <86box/device.h>
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typedef struct ics2494_t {
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float freq[16];
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} ics2494_t;
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#ifdef ENABLE_ICS2494_LOG
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int ics2494_do_log = ENABLE_ICS2494_LOG;
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static void
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ics2494_log(const char *fmt, ...)
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{
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va_list ap;
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if (ics2494_do_log) {
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va_start(ap, fmt);
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pclog_ex(fmt, ap);
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va_end(ap);
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}
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}
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#else
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# define ics2494_log(fmt, ...)
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#endif
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float
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ics2494_getclock(int clock, void *priv)
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{
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const ics2494_t *ics2494 = (ics2494_t *) priv;
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if (clock > 15)
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clock = 15;
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ics2494_log("Clock=%d, freq=%f.\n", clock, ics2494->freq[clock]);
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return ics2494->freq[clock];
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}
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static void *
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ics2494_init(const device_t *info)
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{
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ics2494_t *ics2494 = (ics2494_t *) malloc(sizeof(ics2494_t));
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memset(ics2494, 0, sizeof(ics2494_t));
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switch (info->local) {
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case 10:
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/* ATI 18810 for ATI 28800 */
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ics2494->freq[0x0] = 42954000.0;
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ics2494->freq[0x1] = 48771000.0;
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ics2494->freq[0x2] = 0.0;
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ics2494->freq[0x3] = 36000000.0;
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ics2494->freq[0x4] = 50350000.0;
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ics2494->freq[0x5] = 56640000.0;
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ics2494->freq[0x6] = 0.0;
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ics2494->freq[0x7] = 44900000.0;
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ics2494->freq[0x8] = 30240000.0;
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ics2494->freq[0x9] = 32000000.0;
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ics2494->freq[0xa] = 37500000.0;
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ics2494->freq[0xb] = 39000000.0;
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ics2494->freq[0xc] = 40000000.0;
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ics2494->freq[0xd] = 56644000.0;
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ics2494->freq[0xe] = 75000000.0;
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ics2494->freq[0xf] = 65000000.0;
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break;
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case 110:
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/* ATI 18811-0 for ATI Mach32 */
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ics2494->freq[0x0] = 42954000.0;
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ics2494->freq[0x1] = 48771000.0;
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ics2494->freq[0x2] = 92400000.0;
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ics2494->freq[0x3] = 36000000.0;
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ics2494->freq[0x4] = 50350000.0;
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ics2494->freq[0x5] = 56640000.0;
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ics2494->freq[0x6] = 0.0;
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ics2494->freq[0x7] = 44900000.0;
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ics2494->freq[0x8] = 30240000.0;
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ics2494->freq[0x9] = 32000000.0;
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ics2494->freq[0xa] = 110000000.0;
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ics2494->freq[0xb] = 80000000.0;
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ics2494->freq[0xc] = 39910000.0;
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ics2494->freq[0xd] = 44900000.0;
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ics2494->freq[0xe] = 75000000.0;
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ics2494->freq[0xf] = 65000000.0;
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break;
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case 111:
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/* ATI 18811-1 for ATI Mach32 MCA */
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ics2494->freq[0x0] = 100000000.0;
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ics2494->freq[0x1] = 126000000.0;
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ics2494->freq[0x2] = 92400000.0;
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ics2494->freq[0x3] = 36000000.0;
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ics2494->freq[0x4] = 50350000.0;
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ics2494->freq[0x5] = 56640000.0;
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ics2494->freq[0x6] = 0.0;
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ics2494->freq[0x7] = 44900000.0;
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ics2494->freq[0x8] = 135000000.0;
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ics2494->freq[0x9] = 32000000.0;
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ics2494->freq[0xa] = 110000000.0;
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ics2494->freq[0xb] = 80000000.0;
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ics2494->freq[0xc] = 39910000.0;
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ics2494->freq[0xd] = 44900000.0;
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ics2494->freq[0xe] = 75000000.0;
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ics2494->freq[0xf] = 65000000.0;
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break;
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case 305:
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/* ICS2494A(N)-205 for S3 86C924 */
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ics2494->freq[0x0] = 25175000.0;
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ics2494->freq[0x1] = 28322000.0;
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ics2494->freq[0x2] = 40000000.0;
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ics2494->freq[0x3] = 0.0;
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ics2494->freq[0x4] = 50000000.0;
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ics2494->freq[0x5] = 77000000.0;
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ics2494->freq[0x6] = 36000000.0;
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ics2494->freq[0x7] = 44889000.0;
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ics2494->freq[0x8] = 130000000.0;
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ics2494->freq[0x9] = 120000000.0;
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ics2494->freq[0xa] = 80000000.0;
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ics2494->freq[0xb] = 31500000.0;
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ics2494->freq[0xc] = 110000000.0;
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ics2494->freq[0xd] = 65000000.0;
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ics2494->freq[0xe] = 75000000.0;
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ics2494->freq[0xf] = 94500000.0;
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break;
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default:
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break;
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}
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return ics2494;
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}
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static void
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ics2494_close(void *priv)
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{
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ics2494_t *ics2494 = (ics2494_t *) priv;
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if (ics2494)
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free(ics2494);
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}
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const device_t ics2494an_305_device = {
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.name = "ICS2494AN-305 Clock Generator",
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.internal_name = "ics2494an_305",
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.flags = 0,
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.local = 305,
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.init = ics2494_init,
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.close = ics2494_close,
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.reset = NULL,
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{ .available = NULL },
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.speed_changed = NULL,
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.force_redraw = NULL,
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.config = NULL
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};
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const device_t ati18810_device = {
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.name = "ATI 18810 Clock Generator",
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.internal_name = "ati18810",
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.flags = 0,
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.local = 10,
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.init = ics2494_init,
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.close = ics2494_close,
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.reset = NULL,
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{ .available = NULL },
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.speed_changed = NULL,
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.force_redraw = NULL,
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.config = NULL
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};
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const device_t ati18811_0_device = {
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.name = "ATI 18811-0 Clock Generator",
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.internal_name = "ati18811_0",
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.flags = 0,
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.local = 110,
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.init = ics2494_init,
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.close = ics2494_close,
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.reset = NULL,
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{ .available = NULL },
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.speed_changed = NULL,
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.force_redraw = NULL,
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.config = NULL
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};
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const device_t ati18811_1_device = {
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.name = "ATI 18811-1 Clock Generator",
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.internal_name = "ati18811_1",
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.flags = 0,
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.local = 111,
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.init = ics2494_init,
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.close = ics2494_close,
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.reset = NULL,
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{ .available = NULL },
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.speed_changed = NULL,
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.force_redraw = NULL,
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.config = NULL
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};
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