Code:
modeline '240x240@58,795' 9,66 240 252 276 310 240 243 246 265 -hsync -vsync doublescan
modeline '256x240@60,436' 10,6 256 272 296 336 240 244 247 261 -hsync -vsync doublescan
modeline '256x256@59,496' 10,72 256 268 292 330 256 257 260 273 -hsync -vsync doublescan
modeline '256x264@58,317' 10,7 256 268 292 330 264 265 268 278 -hsync -vsync doublescan
modeline '288x240@59,885' 11,68 288 296 328 368 240 243 246 265 -hsync -vsync doublescan
modeline '296x240@59,941' 11,9 296 304 336 376 240 243 246 264 -hsync -vsync doublescan
modeline '304x240@59,305' 12,4 304 320 352 396 240 243 246 264 -hsync -vsync doublescan
modeline '321x240@59,014' 12,9 321 336 368 414 240 242 245 264 -hsync -vsync doublescan
modeline '320x256@59,917' 13,36 321 340 372 416 256 257 260 268 -hsync -vsync doublescan
modeline '336x240@59,749' 13,66 336 352 384 433 240 243 246 264 -hsync -vsync doublescan
modeline '352x256@59,697' 14,56 352 368 400 450 256 257 260 271 -hsync -vsync doublescan
modeline '352x264@57,257' 14,7 352 365 405 452 264 265 268 284 -hsync -vsync doublescan
modeline '352x288@51,116' 14,8 352 368 408 464 288 289 292 312 -hsync -vsync doublescan
modeline '368x240@59,196' 14,94 368 384 424 478 240 243 246 264 -hsync -vsync doublescan
modeline '384x288@51,219' 15,7 384 400 440 496 288 289 292 309 -hsync -vsync doublescan
modeline '392x240@59,898' 16 392 408 448 504 240 243 246 265 -hsync -vsync doublescan
modeline '400x256@52,419' 16,16 401 416 456 519 256 268 271 297 -hsync -vsync doublescan
modeline '448x240@60,01' 18,32 448 464 512 576 240 243 246 265 -hsync -vsync doublescan
modeline '512x240@59,973' 21,36 512 544 600 672 240 243 246 265 -hsync -vsync doublescan
modeline '512x288@50,939' 21,36 512 544 600 672 288 289 292 312 -hsync -vsync doublescan
modeline '632x264@56,751' 26 632 664 728 824 264 265 268 278 -hsync -vsync doublescan
modeline '640x240@59,96' 26,44 640 672 736 832 240 243 246 265 -hsync -vsync doublescan
modeline '640x288@50,955' 26,2 640 672 736 832 288 289 292 309 -hsync -vsync doublescan