mirror of
https://github.com/raz0red/wii7800.git
synced 2024-05-31 18:57:29 -04:00
3e4adaee79
* Added partial XM support Added POT support to Pokey Modifed Pokey and TIA Buffers Fixed issue where pokey counter was not being reset Added temporary hack to get Pac320 to work (may cause issues) * Added Pokey @450 support Added Support for carts about 144k Improved cart detection (via header and by size) Fixed issue occurring when Kangaroo and Holey were enabled (caused backgroud to be displayed causing large black squares) * Added ability to edit cartridge DB in UI Added disable bios, left/right switch, swap buttons, pokey@450, and xm to cartridge database. Fixed Pokey pops that were occurring Removed WSYNC, cycle stealing, and swap buttons from global settings * Fixed bug with cart db UI and dual analog * Added XM to save states * Defaults to latest save state when loading cart * Minor menu fix (able to select spacer) * Reorganized advanced menu * Added whether cart was loaded from db in debug * Temporarily disable BIOS support Will enable once issue is resolved * Reduced TIA volume slightly * Fixed controller for crossbow and alien brigade * Added Bentley Bear's Crystal Quest to DB * Bank switching fixes, new cart type Fixed 64k cart bank switching when specifying out of range bank Added new cartridge mode "Standard RAM". 64k or less w/ RAM at $4000 Removed global high score cart setting Added per-cartridge setting for HSC (default to header value) * Updates to prosystem database Cartridge size uses file size (vs. header) Default controllers to joysticks Fix database load issue (sometimes read into next entry) Added default cart title (when not in header or DB) Added another default screen size Fixed vsync issue (caused stutter, mostly on PAL titles) * Many homebrew additions to cart database Fixed issue where some IM hacks were not loading Updated db editor to always write out pokey450 and XM settings * More cart database entries * Updated readme files and images for 0.5 release * Updated readme * Updated release date
116 lines
4.3 KiB
C++
116 lines
4.3 KiB
C++
/*
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Memory map:
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POKEY1 $0450 $045F 16 bytes
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POKEY2* $0460 $046F 16 bytes
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XCTRL $0470 $047F 1 byte
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RAM $4000 $7FFF 16384 bytes
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XCTRL Bit Description
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+-------------------------------+
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| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
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+-------------------------------+
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| | | | | | | |
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| | | | | | | +-- Bank select bit 0 \
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| | | | | | +------ Bank select bit 1 | Totally 128 KByte in 16 KByte banks
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| | | | | +---------- Bank select bit 3 /
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| | | | +-------------- Enable memory bit (1 = Memory enabled, 0 after power on)
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| | | +------------------ Enable POKEY bit** (1 = POKEY enabled, 0 after power on)
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NA NA NA = Not Available or Not Used
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* = Can be mounted piggy back on the first POKEY. Description how to do this will come when i have tried it out.
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** This bit controls both POKEY chip select signals.
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The mapping is totally non compatible with pretty much everything.
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There is a bank select latch located at $0470 and the POKEY is located at $0450
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(There's also a chip select output ($0460) on the PLD which alows you to simply piggy back a second POKEY).
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Since the PLD is reconfigurable I could map the POKEY (or the RAM for that matter) to pretty much anything
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if you wanted to. However since the PLD is soldered under the POKEY this needs to be configured before delivery.
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*/
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#include <string.h>
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#include "ExpansionModule.h"
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#ifdef WII_NETTRACE
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#include <network.h>
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#include "net_print.h"
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#endif
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byte xm_ram[XM_RAM_SIZE] = {0};
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byte xm_reg = 0;
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byte xm_bank = 0;
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bool xm_pokey_enabled = false;
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bool xm_mem_enabled = false;
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void xm_Reset() {
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memset(xm_ram, 0, XM_RAM_SIZE);
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xm_bank = 0;
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xm_reg = 0;
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xm_mem_enabled = false;
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xm_pokey_enabled = false;
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}
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byte xm_Read(word address) {
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if (xm_pokey_enabled && (address >= 0x0450 && address < 0x0460)) {
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byte b = pokey_GetRegister(0x4000 + (address - 0x0450));
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#if 0
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net_print_string(NULL, 0, "Read from Pokey1: %x %d\n", address, b);
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#endif
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return b;
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} else if (xm_pokey_enabled && (address >= 0x0460 && address < 0x0470)) {
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byte b = pokey_GetRegister(0x4000 + (address - 0x0460));
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#if 0
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net_print_string(NULL, 0, "Read from Pokey2: %x %d\n", address, b);
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#endif
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return b;
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} else if (xm_mem_enabled && (address >= 0x4000 && address < 0x8000)) {
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byte b = xm_ram[(xm_bank * 0x4000) + (address - 0x4000)];
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#if 0
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net_print_string(NULL, 0, "Read from XM RAM: %x %d\n", address, b);
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#endif
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return b;
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} else if (address >= 0x0470 && address < 0x0480) {
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#if 0
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net_print_string(NULL, 0, "Read from XCTRL 0x0470: %x\n", address);
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#endif
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// TODO: Should the value be returned?
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}
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return 0;
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}
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void xm_Write(word address, byte data) {
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if (xm_pokey_enabled && (address >= 0x0450 && address < 0x0460)) {
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#if 0
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net_print_string(NULL, 0, "Wrote to Pokey1: %x %d\n", address, data);
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#endif
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pokey_SetRegister(0x4000 + (address - 0x0450), data);
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} else if (xm_pokey_enabled && (address >= 0x0460 && address < 0x0470)) {
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#if 0
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net_print_string(NULL, 0, "Wrote to Pokey2: %x %d\n", address, data);
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#endif
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pokey_SetRegister(0x4000 + (address - 0x0460), data);
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} else if (xm_mem_enabled && (address >= 0x4000 && address < 0x8000)) {
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#if 0
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net_print_string(NULL, 0, "Wrote to XM RAM: %x %d\n", address, data);
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#endif
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xm_ram[(xm_bank * 0x4000) + (address - 0x4000)] = data;
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} else if (address >= 0x0470 && address < 0x0480) {
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#ifdef WII_NETTRACE
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net_print_string(NULL, 0, "Wrote to XCTRL 0x0470: %x %d\n", address,
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data);
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#endif
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xm_reg = data;
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xm_bank = xm_reg & 7;
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xm_pokey_enabled = (xm_reg & 0x10);
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xm_mem_enabled = (xm_reg & 0x08);
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#ifdef WII_NETTRACE
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net_print_string(NULL, 0, "xm_reg: %d, xm_bank: %d, xm_pokey_enabled: %d, xm_mem_enabled: %d\n",
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xm_reg, xm_bank, xm_pokey_enabled, xm_mem_enabled);
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#endif
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}
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}
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