9312de19ac
Changes since v0.7 : - Major CPU reorganisation. This has possibly broken some stuff, though I fixed all the regressions I could find - Lazy flags. This brought 10% speed improvement at one point, but that's probably been lost now - 430 VX chipset emulation - IDT Winchip emulation (currently sans MMX). Timing is probably wrong - Fixed a few FPU bugs - Timer reorganisation - Sound reorganisation - Other general reorganisation - AdLib Gold emulation - Windows Sound System emulation - Pro Audio Spectrum 16 emulation. This currently works with most DOS stuff, but not in Windows - Major improvements to GUS emulation. Has the downside that it now conflicts with SB emulation, so probably best to not enable both simultaneously - New graphics cards : - ATI-18800 (VGA Edge-16) - ATI-28800 (VGA Charger) - ATI Mach64GX (Graphics Pro Turbo). Quite a few features missing, but Windows doesn't seem to use half the features of this card - Cirrus Logic CL-GD5429. Blitter is a bit broken - Oak OTI-067 - S3 Trio64 (Number Nine 9FX) - S3 Virge. Only framebuffer stuff at the minute, Windows won't recognise the card - Trident TGUI-9440 - VGA. Doesn't work yet - Beginnings of 3DFX emulation, however this is in extremely early stages and doesn't do anything useful - Fixed DMA bug stopping floppy drives working in Windows 3.x - Fixed some other stuff probably - Broke some other stuff probably as well
68 lines
2.3 KiB
C
68 lines
2.3 KiB
C
/*This is the chipset used in the AMI 286 clone model*/
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#include "ibm.h"
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#include "io.h"
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#include "neat.h"
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static uint8_t neat_regs[256];
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static int neat_index;
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static int neat_emspage[4];
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void neat_write(uint16_t port, uint8_t val, void *priv)
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{
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switch (port)
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{
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case 0x22:
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neat_index = val;
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break;
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case 0x23:
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neat_regs[neat_index] = val;
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switch (neat_index)
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{
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case 0x6E: /*EMS page extension*/
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neat_emspage[3] = (neat_emspage[3] & 0x7F) | (( val & 3) << 7);
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neat_emspage[2] = (neat_emspage[2] & 0x7F) | (((val >> 2) & 3) << 7);
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neat_emspage[1] = (neat_emspage[1] & 0x7F) | (((val >> 4) & 3) << 7);
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neat_emspage[0] = (neat_emspage[0] & 0x7F) | (((val >> 6) & 3) << 7);
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break;
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}
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break;
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case 0x0208: case 0x0209: case 0x4208: case 0x4209:
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case 0x8208: case 0x8209: case 0xC208: case 0xC209:
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neat_emspage[port >> 14] = (neat_emspage[port >> 14] & 0x180) | (val & 0x7F);
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break;
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}
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}
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uint8_t neat_read(uint16_t port, void *priv)
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{
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switch (port)
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{
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case 0x22:
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return neat_index;
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case 0x23:
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return neat_regs[neat_index];
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}
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return 0xff;
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}
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void neat_writeems(uint32_t addr, uint8_t val)
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{
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ram[(neat_emspage[(addr >> 14) & 3] << 14) + (addr & 0x3FFF)] = val;
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}
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uint8_t neat_readems(uint32_t addr)
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{
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return ram[(neat_emspage[(addr >> 14) & 3] << 14) + (addr & 0x3FFF)];
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}
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void neat_init()
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{
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io_sethandler(0x0022, 0x0002, neat_read, NULL, NULL, neat_write, NULL, NULL, NULL);
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io_sethandler(0x0208, 0x0002, neat_read, NULL, NULL, neat_write, NULL, NULL, NULL);
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io_sethandler(0x4208, 0x0002, neat_read, NULL, NULL, neat_write, NULL, NULL, NULL);
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io_sethandler(0x8208, 0x0002, neat_read, NULL, NULL, neat_write, NULL, NULL, NULL);
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io_sethandler(0xc208, 0x0002, neat_read, NULL, NULL, neat_write, NULL, NULL, NULL);
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}
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