Mercurial > repos > blastem
annotate README @ 1708:5bfed2eedc9d
Fixed flag calculation for sub instructions in CPU DSL
| author | Michael Pavone <pavone@retrodev.com> |
|---|---|
| date | Mon, 28 Jan 2019 22:37:46 -0800 |
| parents | 35c308355bfb |
| children | 8aeac7bd9fa7 |
| rev | line source |
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| 1662 | 1 BlastEm 0.6.0 |
| 468 | 2 ------------- |
| 3 | |
| 4 Installation | |
| 5 ------------ | |
| 6 | |
| 1662 | 7 Extract this archive to a directory of your choosing. |
| 1066 | 8 |
| 9 NOTE: Prior to version 0.4.1, BlastEm was still using Unixy locations for config | |
| 10 and save files. If you're upgrading from a previous version on Windows, you will | |
| 11 need to move them manually. For config files, the relevant paths are in the | |
| 12 previous paragraph. For save files, move all the directories found in | |
| 13 %userprofile%\.local\share\blastem to %localappdata%\blastem | |
| 468 | 14 |
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15 Usage |
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16 ----- |
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17 |
| 1662 | 18 This version of BlastEm has a GUI that allows access to most configuration options. |
| 19 Simply start BlastEm without passing a ROM filename on the command line to access | |
| 20 the main menu. You can also access the menu by hitting the button mapped to the ui.exit | |
| 21 action (default Esc). | |
| 22 | |
| 23 If Open GL is disabled or unavaible, or you explicitly request it, the old ROM-based UI | |
| 24 will be used instead. This UI does not support configuration so you will need to modify | |
| 25 the configuration file manually if you use it. See the rest of this README for instructions | |
| 26 on modifying the configuration file. | |
| 1013 | 27 |
| 28 Some operations are currently only supported through the command line. To get a | |
| 29 list of supported command line options on Linux or OSX type: | |
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30 |
| 1066 | 31 ./blastem -h |
| 32 | |
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33 From within your BlastEm directory. On Windows type: |
| 1066 | 34 |
| 35 blastem.exe -h | |
| 36 | |
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37 Lock-On Support |
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38 --------------- |
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39 |
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40 This version of BlastEm has some preliminary support for Sonic & Knuckles lock |
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41 on technology. This is available via both the menu and the command line. To use |
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42 it from the menu, first load Sonic & Knuckles normally. Enter the menu (mapped |
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43 to the Escape key by default) and select the "Lock On" option to select a ROM |
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44 to lock on. The system will then reload with the combined game. To use it from |
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45 the command line, specify the Sonic & Knuckles ROM as the primary ROM and |
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46 specify the ROM to be locked on using the -o option. As an example: |
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47 |
| 1066 | 48 ./blastem ~/romz/sonic_and_knuckles.bin -o ~/romz/sonic3.bin |
| 49 | |
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50 Please note that Sonic 2 lock-on does not work at this time. |
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51 |
| 468 | 52 Configuration |
| 53 ------------- | |
| 54 | |
| 1066 | 55 Configuration is read from the file at $HOME/.config/blastem/blastem.cfg on |
| 56 Unix-like systems and %localappdata%\blastem\blastem.cfg if it exists. | |
| 57 Othwerise it is read from default.cfg from the same directory as the BlastEm | |
| 58 executable. Sections are denoted by a section name followed by an open curly | |
| 59 bracket, the section's contents and a closing curly bracket. Individual | |
| 468 | 60 configuration values are set by entering the value's name followed by a space |
| 61 or tab and followed by the desired value. | |
| 62 | |
| 63 Bindings | |
| 64 -------- | |
| 65 | |
| 66 The keys subsection of bindings maps keyboard keys to gamepad buttons or UI | |
| 67 actions. The key name goes on the left and the action is on the right. | |
| 1066 | 68 Most keys are named for the character they produce when pressed. For keys that |
| 69 don't correspond to a normal character, check the list below: | |
| 70 | |
| 71 Name | Description | |
| 72 ----------------- | |
| 73 up Up arrow | |
| 74 down Down arrow | |
| 75 left Left arrow | |
| 76 right Right arrow | |
| 77 space | |
| 78 tab | |
| 79 backspace Backspace on PC keyboards, Delete on Mac keyboards | |
| 80 esc | |
| 81 delete | |
| 82 lshift Left shift | |
| 83 rshift Right shift | |
| 84 lctrl Left control | |
| 85 rctrl Right control | |
| 86 lalt Left alt on PC keyboards, Option on Mac keyboards | |
| 87 ralt Right alt on PC keyboards, Option on Mac keyboards | |
| 88 home | |
| 89 end | |
| 90 pageup | |
| 91 pagedown | |
| 92 f1 | |
| 93 f2 | |
| 94 f3 | |
| 95 f4 | |
| 96 f5 | |
| 97 f6 | |
| 98 f7 | |
| 99 f8 | |
| 100 f9 | |
| 101 f10 | |
| 102 f11 | |
| 103 f12 | |
| 104 select | |
| 105 play | |
| 106 search | |
| 107 back | |
| 468 | 108 |
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109 The pads subsection is used to map gamepads and joysticks. Gamepads that are |
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110 recognized, can have their buttons and axes mapped with semantic names. |
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111 Xbox 360, PS4 and PS3 style names are supported. Unrecognized gamepads can be |
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112 mapped using numeric button and axis ids. The following button names are |
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113 recognized by BlastEm: |
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114 a, cross |
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115 b, circle |
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116 x, square |
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117 y, trinagle |
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118 start, options |
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119 back, select, share |
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120 guide |
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121 leftbutton, l1 |
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122 rightbutton, r1 |
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123 leftstick, l3 |
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124 rightstick, r3 |
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125 The following axis names are recognized by BlastEm: |
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126 leftx |
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127 lefty |
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128 rightx |
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129 righty |
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130 lefttrigger, l2 |
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131 righttrigger, r2 |
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132 |
| 1013 | 133 |
| 134 The mice subsection is used to map mice to emulated Mega/Sega mice. The default | |
| 135 configuration maps both the first and second host mice to the first emulated | |
| 136 mouse. This should not need modification for most users. | |
| 137 | |
| 138 One special mapping deserves a mention. By default, the 'r' key is mapped to | |
| 139 ui.release_mouse. When operating in windowed mode the mouse has a capture | |
| 140 behavior. Mouse events are ignored until you click in the window. The mouse | |
| 141 will then be "captured" and the cursor will be both made invisible and locked | |
| 142 to the window. The ui.release_mouse binding releases the mouse so it can be | |
| 143 used normally. | |
| 144 | |
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145 UI Actions |
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146 ---------- |
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147 |
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148 This section lists the various "UI" actions that can be triggered by a key or |
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149 gamepad binding. |
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150 |
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151 ui.release_mouse Releases the mouse if it is currently captured |
| 1662 | 152 ui.plane_debug Toggles the VDP plane debug view |
| 153 ui.vram_debug Toggles the VDP VRAM debug view | |
| 154 ui.cram_debug Toggles the VDP CRAM debug view | |
| 155 ui.compositing_debug Toggles the VDP compositing debug view | |
| 156 ui.vdp_debug_mode Cycles the mode/palette of the VDP debug view | |
| 157 that currently has focus | |
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158 ui.enter_debugger Enters the debugger for the main CPU of the |
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159 currently emulated system |
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160 ui.screenshot Takes an internal screenshot |
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161 ui.exit Returns to the menu ROM if currently in a game |
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162 that was launched from the menu. Exits otherwise |
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163 ui.save_state Saves a savestate to the quicksave slot |
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164 ui.set_speed.N Selects a specific machine speed specified by N |
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165 which should be a number between 0-9. Speeds are |
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166 specified in the "clocks" section of the config |
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167 ui.next_speed Selects the next machine speed |
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168 ui.prev_speed Selects the previous machine speed |
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169 ui.toggle_fullscreen Toggles between fullscreen and windowed mode |
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170 ui.soft_reset Resets a portion of the emulated machine |
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171 Equivalent to pushing the reset button on the |
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172 emulated device |
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173 ui.reload Reloads the current ROM from a file and performs |
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174 a hard reset of the emulated device |
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175 ui.sms_pause Triggers a press of the pause button when in SMS |
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176 mode |
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177 ui.toggle_keyboard_captured Toggles the capture state of the host keyboard |
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178 when an emulated keyboard is present |
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179 |
| 1013 | 180 IO |
| 181 -- | |
| 182 | |
| 183 This section controls which peripherals are attached to the emulated console. | |
| 184 IO assignments can be overridden by the ROM database when appropriate. For | |
| 185 instance, games with mouse support can automatically use the mouse and games | |
| 186 that only support 3-button pads can automatically force an appropriate pad. | |
| 187 Unforunately, the ROM database is not yet exhaustive so manual configuration | |
| 188 may be needed here in some cases. | |
| 468 | 189 |
| 190 Video | |
| 191 ----- | |
| 192 | |
| 1013 | 193 The video section contains settings that affect the visual output of BlastEm. |
| 194 | |
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195 "aspect" is used to control the aspect ratio of the emulated display. The |
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196 default of 4:3 matches that of a standard definition television. |
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197 |
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198 "width" is used to control the window width when not in fullscreen mode. |
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199 |
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200 "height" is used to control the window height when not in fullscreen mode. If |
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201 left unspecified, it will be calculated from "width" and "aspect". |
| 1013 | 202 |
| 203 "vertex_shader" and "fragment_shader" define the GLSL shader program that | |
| 204 produces the final image for each frame. Shaders can be used to add various | |
| 205 visual effects or enhancements. Currently BlastEm only ships with the default | |
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206 shader and a "subtle" crt shader. If you write your own shaders, place them in |
| 1013 | 207 $HOME/.config/blastem/shaders and then specify the basename of the new shader |
| 208 files in the "vertex_shader" and "fragment_shader" config options. Note that | |
| 209 shaders are not available in the SDL fallback renderer. | |
| 210 | |
| 211 "scanlines" controls whether there is any emulation of the gaps between display | |
| 212 lines that are present when driving a CRT television with a 240p signal. This | |
| 213 emulation is very basic at the moment so this option is off by default. | |
| 214 | |
| 215 "vsync" controls whether the drawing of frames is synchronized to the monitor | |
| 216 refresh rate. Valid values for this setting are "off", "on" and "tear". The | |
| 217 latter will attempt to use the "late tear" option if it's available and normal | |
| 218 vsync otherwise. Currently it's recommended to leave this at the default of | |
| 1662 | 219 "off" as it may not work well with the default "audio" sync method and the |
| 220 "video" sync method will automatically enable "vsync". See "Sync Source and | |
| 221 VSync" for more details. | |
| 468 | 222 |
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223 "fullscreen" controls whether BlastEm starts in fullscreen or windowed mode. |
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224 This can be overridden on the command line with the -f flag. If fullscreen |
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225 is set to "off", -f will turn it on. Conversely, if fullscreen is set to "on" |
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226 in the config, -f will turn it off. |
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227 |
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228 "gl" controls whether OpenGL is used for rendering. The default value is on. |
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229 If it is set to off instead, the fallback renderer which uses SDL2's render API |
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230 will be used instead. This option is mostly useful for users on hardware that |
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231 lacks OpenGL 2 support. While BlastEm will fall back automatically even if gl |
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232 is set to on there will be a warning. Disabling gl eliminates this warning. |
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233 |
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234 "scaling" controls the type of scaling used for textures in both the GL and |
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235 SDL renderers. Valid values are "nearest" and "linear". Note that shaders also |
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236 impact how pixels are scaled. |
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237 |
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238 The "ntsc" and "pal" sub-sections control overscan settings for the emulated |
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239 video output for NTSC and PAL consoles respectively. More details are available |
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240 in the Overscan section. |
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241 |
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242 Overscan |
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243 -------- |
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244 |
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245 Analog televisions generally don't display the entirety of a video frame. Some |
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246 portion is cropped at the edges of the display. This is called overscan. |
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247 Unfortunately, the amount of cropping performed varies considerably and is even |
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248 adjustable on many TV sets. To deal with this, BlastEm allows overscan to be |
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249 customized. |
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250 |
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251 Overscan values are specified in the "ntsc" and "pal" sub-sections of the |
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252 "video" section of the config file. The "overscan" sub-section contains four |
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253 settings for specifying the number of pixels cropped on each side of the |
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254 display: "top", "bottom", "left" and "right". |
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255 |
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256 The default settings hide the horizontal border completely for both NTSC and |
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257 PAL consoles. For the vertical borders, the NTSC overscan settings are chosen |
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258 to give square pixels with the default aspect ratio of 4:3. For PAL, the |
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259 default settings are set so that the PAL-exclusive V30 mode will produce a |
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260 visible border that is the same size as what is shown in V28 mode in NTSC. This |
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261 results in a slightly squished picture compared to NTSC which is probably |
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262 appropriate given that a PAL display has more lines than an NTSC one. |
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263 |
| 468 | 264 Audio |
| 265 ----- | |
| 266 | |
| 1014 | 267 The audio section contains settings that affect the audio output of BlastEm. |
| 1013 | 268 |
| 269 "rate" selects the preferred sample rate for audio output. Your operating | |
| 270 system may not accept this value in which case a different rate will be chosen. | |
| 271 This should generally be either the native sample rate of your sound card or an | |
| 272 integral divisor of it. Most modern sound cards have a native output rate that | |
| 273 is a multiple of 48000 Hz so the default setting should work well for most users. | |
| 274 | |
| 275 "buffer size" controls how large of a buffer uses for audio data. Smaller values | |
| 276 will reduce latency, but too small of a value can lead to dropouts. 512 works | |
| 277 well for me, but a higher or lower value may be more appropriate for your system. | |
| 278 | |
| 279 "lowpass_cutoff" controls the cutoff, or knee, frequency of the RC-style | |
| 280 low-pass filter. The default value of 3390 Hz is supposedly what is present in | |
| 281 at least some Genesis/Megadrive models. Other models reportedly use an even | |
| 282 lower value. | |
| 468 | 283 |
| 1014 | 284 Clocks |
| 285 ------ | |
| 286 | |
| 287 The clocks section contains settings that affect how fast things run. | |
| 288 | |
| 289 "m68k_divider" describes the relationsip between the master clock (which is | |
| 290 53693175 Hz for NTSC mode and 53203395 Hz for PAL mode). The default value of 7 | |
| 291 matches the real hardware. Set this to a lower number to overclock the 68000 | |
| 292 and set it to a higher number to underclock it. | |
| 293 | |
| 294 "max_cycles" controls how often the system is forced to synchronize all | |
| 295 hardware. BlastEm generally uses a sync on demand approach to synchronizing | |
| 296 components in the system. This can provide perfect synchronization for most | |
| 297 components, but since the Z80 can steal cycles from the 68000 at unpredictable | |
| 298 times 68000/Z80 synchronization is imperfect. The default value of 3420 | |
| 299 corresponds to the number of master clock cycles per line. Larger numbers may | |
| 300 produce a modest performance improvement whereas smaller numbers will improve | |
| 301 68000/Z80 synchronization. | |
| 302 | |
| 303 "speeds" controls the speed of the overall emulated console at different | |
| 304 presets. Preset 0 is the default speed and should normally be set to 100. The | |
| 305 other presets enable the slow/turbo mode functionality. | |
| 306 | |
| 307 UI | |
| 308 -- | |
| 309 | |
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310 The UI section contains settings that affect the user interface. |
| 1014 | 311 |
| 312 "rom" determines the path of the Genesis/Megadrive ROM that implements the UI. | |
| 313 Relative paths will be loaded relative to the BlastEm executable. | |
| 314 | |
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315 "initial_path" specifies the starting path for the ROM browser. It can contain |
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316 the following special variables: $HOME, $EXEDIR. Additionally, variables |
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317 defined in the OS environment can be used. |
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318 |
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319 "remember_path" specifies whether BlastEm should remember the last path used in |
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320 the file browser. When it is set to "on", the last path will be remembered and |
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321 used instead of "initial_path" in subsequent runs. If it is set to "off", |
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322 "initial_path" will always be used. |
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323 |
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324 "screenshot_path" specifies the directory "internal" screenshots will be saved |
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325 in. It accepts the same special variables as "initial_path". |
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326 |
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327 "screenshot_template" specifies a template for creating screenshot filenames. |
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328 It is specified as a format string for the C library function strftime |
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329 |
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330 "save_path" specifies the directory that savestates, SRAM and EEPROM data will |
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331 be saved in for a given game. It can contain the following special variables: |
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332 $HOME, $EXEDIR, $USERDATA, $ROMNAME. Like "initial_path" it can also reference |
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333 variables from the environment. |
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334 |
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335 "extensions" specifies the file extensions that should be displayed in the file |
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336 browser. |
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337 |
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338 "state_format" specifies the preferred format for saving save states. Valid |
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339 values are "native" (the default) and "gst". "native" save states do a better |
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340 job of preserving the state of the emulated system, but "gst" save states are |
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341 compatible with other emulators like Kega and Gens. This setting has no effect |
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342 for systems other than the Genesis/Mega Drive |
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343 |
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344 Path Variables |
| 1014 | 345 -------------- |
| 346 | |
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347 This section explains the meaning of the special path variables referenced |
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348 in the previous section. |
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349 |
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350 $HOME The home directory of the current user. On most Unix variants, it |
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351 will be a subdirectory of /home. On Windows it will typically be a |
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352 subdirectory of C:\Users |
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353 $EXEDIR The directory the BlastEm executable is located in |
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354 $USERDATA This is an OS-specific path used for storing application specific |
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355 user data. On Unix variants, it will be $HOME/.local/share/blastem |
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356 On Windows it will be %LOCALDATA%/blastem |
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357 $ROMNAME The name of the currently loaded ROM file without the extension |
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358 |
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359 System |
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360 ------ |
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361 |
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362 "ram_init" determines how the RAM in the emulated system is initialized. The |
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363 default value of "zero" will cause all RAM to be zeroed out before the system |
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364 is started. Alternatively, "random" can be used to initialize RAM with values |
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365 from a pseudo-random number generator. This option is mostly useful for |
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366 developers that want to debug initialization issues in their code. |
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367 |
| 1014 | 368 "default_region" determines the console region that will be used when region |
| 369 detection fails and when there are multiple valid regions. The default of 'U' | |
| 1662 | 370 specifies a 60Hz "foreign" console. |
| 371 | |
| 372 "sync_source" controls whether BlastEm uses audio or video output to control | |
| 373 execution speed. "video" can provide a smoother experience when your display | |
| 374 has a similar refresh rate to the emulated system, but has some limitations | |
| 375 in the current version. The default value is "audio". | |
| 376 | |
| 377 "megawifi" enables or disables support for MegaWiFi cart emulation. MegaWiFi | |
| 378 is a cartridge that contains WiFi hardware for network functionality. Enabling | |
| 379 this means that ROMs potentially have access to your network (and the internet) | |
| 380 which obviously has security implications. For this reason, it is disabled by | |
| 381 default. If you wish to try out MegaWiFi emulation, set this to "on". Note that | |
| 382 the support for MegaWiFi hardware is preliminary in this release. | |
| 1014 | 383 |
| 468 | 384 Debugger |
| 385 -------- | |
| 386 | |
| 387 BlastEm has an integrated command-line debugger loosely based on GDB's | |
| 388 interface. The interface is very rough at the moment. Available commands in the | |
| 389 68K debugger are: | |
| 1066 | 390 b ADDRESS - Set a breakpoint at ADDRESS |
| 391 d BREAKPOINT - Delete a 68K breakpoint | |
| 392 co BREAKPOINT - Run a list of debugger commands each time | |
| 1014 | 393 BREAKPOINT is hit |
| 1066 | 394 a ADDRESS - Advance to address |
| 395 n - Advance to next instruction | |
| 396 o - Advance to next instruction ignoring branches to | |
| 397 lower addresses (good for breaking out of loops) | |
| 398 s - Advance to next instruction (follows bsr/jsr) | |
| 399 c - Continue | |
| 400 bt - Print a backtrace | |
| 401 p[/(x|X|d|c)] VALUE - Print a register or memory location | |
| 402 di[/(x|X|d|c)] VALUE - Print a register or memory location each time | |
| 403 a breakpoint is hit | |
| 404 vs - Print VDP sprite list | |
| 405 vr - Print VDP register info | |
| 406 zb ADDRESS - Set a Z80 breakpoint | |
| 407 zp[/(x|X|d|c)] VALUE - Display a Z80 value | |
| 408 q - Quit BlastEm | |
| 468 | 409 Available commands in the Z80 debugger are: |
| 1066 | 410 b ADDRESS - Set a breakpoint at ADDRESS |
| 411 de BREAKPOINT - Delete a Z80 breakpoint | |
| 412 a ADDRESS - Advance to address | |
| 413 n - Advance to next instruction | |
| 414 c - Continue | |
| 415 p[/(x|X|d|c)] VALUE - Print a register or memory location | |
| 416 di[/(x|X|d|c)] VALUE - Print a register or memory location each time | |
| 417 a breakpoint is hit | |
| 418 q - Quit BlastEm | |
| 468 | 419 |
| 420 The -d flag can be used to cause BlastEm to start in the debugger. | |
| 421 Alternatively, you can use the ui.enter_debugger action (mapped to the 'u' key | |
| 1014 | 422 by default) to enter the debugger while a game is running. To debug the menu |
| 423 ROM, use the -dm flag. | |
| 468 | 424 |
| 536 | 425 GDB Remote Debugging |
| 426 -------------------- | |
| 427 | |
| 428 In addition to the native debugger, BlastEm can also act as a GDB remote | |
| 429 debugging stub. To use this, you'll want to configure your Makefile to produce | |
| 430 both an ELF executable and a raw binary. Invoke an m68k-elf targeted gdb with | |
| 431 the ELF file. Once inside the gdb session, type: | |
| 432 | |
| 1066 | 433 target remote | BLASTEM_PATH/blastem ROM_FILE.bin -D |
| 536 | 434 |
| 435 where BLASTEM_PATH is the relative or absolute path to your BlastEm | |
| 436 installation and ROM_FILE.bin is the name of the raw binary for your program. | |
| 437 BlastEm will halt at the beginning of your program's entry point and return | |
| 438 control to GDB. This will allow you to set breakpoints before your code runs. | |
| 439 | |
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440 On Windows, the procedure is slightly different. First run |
| 1066 | 441 blastem.exe ROM_FILE.bin -D |
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442 This will cause BlastEm to wait for a socket connection on port 1234. It will |
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443 appear to be frozen until gdb connects to it. Now open the ELF file in gdb |
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444 and type: |
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445 |
| 1066 | 446 target remote :1234 |
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447 |
| 536 | 448 Trace points and watch points are not currently supported. |
| 449 | |
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450 Included Tools |
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451 -------------- |
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452 |
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453 BlastEm ships with a few small utilities that leverage portions of the emulator |
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454 code. |
| 1066 | 455 |
| 456 dis - 68K disassembler | |
| 457 zdis - Z80 disassembler | |
| 458 vgmplay - Very basic VGM player | |
| 459 stateview - GST save state viewer | |
| 460 | |
| 1662 | 461 Sync Source and VSync |
| 1013 | 462 ----- |
| 463 | |
| 1662 | 464 This section includes information about using VSync with BlastEm. Currently, |
| 465 the best way to use VSync is to set the sync source to "video". This will force | |
| 466 VSync on and use video output for controlling the speed of emulation. In this | |
| 467 mode, audio will have it's rate automatically adjusted to keep pace with video. | |
| 468 The code for this is still a bit immature, so you may experience dropouts or | |
| 469 pitch changes in this mode. | |
| 1014 | 470 |
| 1662 | 471 If you experience problems, please switch back to the "audio" sync source, |
| 472 which is the default. You can also enable vsync when using the "audio" sync | |
| 473 source by changing the "vsync" setting. This will generally work okay as long | |
| 474 as the emulated refresh rate is below your monitor refresh rate (even if only | |
| 475 slightly), but you will occassionally get a doubled frame (or frequently if | |
| 476 the refresh rates are very different). | |
| 1014 | 477 |
| 1662 | 478 Turbo mode will currently not work when vsync is on, regardless of which sync |
| 479 source is used. Slow mode will work with "audio" sync, but not "video" sync. | |
| 1014 | 480 |
| 1066 | 481 -------------- |
| 482 | |
| 483 My work has been made much easier by the contributions of those in the Genesis | |
| 484 community past and present. I'd like to thank the people below for their help. | |
| 485 | |
| 486 Nemesis - His work reverse engineering and documenting the VDP and | |
| 487 YM-2612 has saved me an immeasurable amount of time. I've | |
| 488 found both his sprite overflow test ROM and VDP FIFO | |
| 489 Testing ROM to be quite helpful. | |
| 490 | |
| 491 Charles MacDonald - While it hasn't been updated in a while, I still find his | |
| 492 VDP document to be my favorite reference. His Genesis | |
| 493 hardware document has also come in handy. | |
| 494 | |
| 495 Eke-Eke - Eke-Eke wrote a great document on the use of I2C EEPROM in | |
| 496 Genesis games and also left some useful very helpful | |
| 497 comments about problematic games in Genesis Plus GX | |
| 498 | |
| 499 Bart Trzynadlowski - His documents on the Genecyst save-state format and the | |
| 500 mapper used in Super Street Fighter 2 were definitely | |
| 501 appreciated. | |
| 502 | |
| 503 KanedaFR - Kaneda's SpritesMind forum is a great resource for the | |
| 504 Sega development community. | |
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505 |
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506 Titan - Titan has created what are without a doubt the most |
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507 impressive demos on the Megadrive. Additionally, I am very |
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508 grateful for the documentation provided by Kabuto and the |
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509 assistance of Kabuto, Sik and Jorge in getting Overdrive 2 |
| 1661 | 510 to run properly in BlastEm. |
| 511 | |
| 512 flamewing - flamewing created a very handy exhaustive test ROM for 68K | |
| 513 BCD instructions and documented the proper behavior for | |
| 514 certain BCD edge cases | |
| 515 | |
| 516 r57shell - r57shell created a test ROM for 68K instruction sizes that | |
| 517 was invaluable in fixing the remaining bugs in my 68K instruction | |
| 518 decoder | |
| 1066 | 519 |
| 520 I'd also like to thank the following people who have performed compatibility | |
| 521 testing or submitted helpful bug reports | |
| 522 | |
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523 micky, Sasha, lol-frank, Sik, Tim Lawrence, ComradeOj, Vladikcomper |
| 1066 | 524 |
| 468 | 525 License |
| 526 ------- | |
| 527 | |
| 528 BlastEm is free software distributed under the terms of the GNU General Public | |
| 529 License version 3 or higher. This gives you the right to redistribute and/or | |
| 530 modify the program as long as you follow the terms of the license. See the file | |
| 531 COPYING for full license details. | |
| 532 | |
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533 Binary releases of BlastEm are packaged with GLEW and SDL2 which have thier own |
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534 licenses. See GLEW-LICENSE and SDL-LICENSE for details. |