Konami Bemani System 573 Digital Hardware
Main CPU : R3000A 32 bit RISC processor, Clock - 33.8688MHz, Operating performance - 30 MIPS, Instruction Cache - 4KB
BUS : 132 MB/sec.
OS ROM : 512 Kilobytes
Additional Sound Chips : Playstation SPU, 24 Channels, 44.1KHz sample rate, PCM audio source, Digital effects include: Envelope, Looping, Digital Reverb, Load up to 512K of sampled waveforms, Supports MIDI Instruments.
Main RAM: 2 Megabytes
Video RAM: 2 Megabyte
Sound RAM : 512 Kilobytes
Graphical Processor : 360,000 polygons/sec, Sprite/BG drawing, Adjustable frame buffer, No line restriction, 4,000 8x8 pixel sprites with individual scaling and rotation, Simultaneous backgrounds (Parallax scrolling)
Sprite Effects : Rotation, Scaling up/down, Warping, Transparency, Fading, Priority, Vertical and horizontal line scroll
Resolution : 256x224 - 740x480
Colours : 16.7 million colors, Unlimited CLUTs (Color Look-Up Tables)
Other Features : custom geometry engine, custom polygon engine, MJPEG decoder
Grades : SSS - SS - S - A - B - C - D - E
Every song has a maximum of score of 10,000,000 which can only be attained by getting all Perfects. The point value for any step in a combo depends on three factors :
The length of your combo does not matter.
Perfects are worth twice as much as Greats.
The last step in every song is a little bit more important in terms of score. Try to get a Perfect on the last step.
The exact formula for the score of a combo is...
Let N be the number of steps in the song you are playing. Let [x] be the greatest integer function (i.e., [x] = the greatest integer less than or equal to x). Then define b, the point value on which the point value for every step in the song is based, to be :
b = [1,000,000/(N(N+1)/2)]
Then, the point value for the ith step in a combo is :
S(i) = P(i), if the ith step is a Perfect; G(i) if the ith step is a Great;
P(i) = 10bi;
G(i) = 5bi;
The only step that deviates from this formula is the last step, or Nth step, of the song. If you get a Perfect on the Nth step, you get the appropriate points for that Perfect, plus a bonus B :
B(N) = 10,000,000 - (summation of P(i) as i goes from 1 to N)