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PPU (Picture Processing Unit). Clock Speed:
1.7897725MHz for NTSC and 1.773447MHz for the PAL
version.
Data Path width: 8-bits
Color Palette: 256; 16 max on screen
Sprites: 64 (8x8 or 8x16)
Sound: FM with 5 sound channels (4 analog, 1 digital)
Video Ram: 16 Kbits
SPR-RAM: 256 Bytes
Rom addressing: 8k
Cart Size: 64k - 4 Megabit
Controls: 8 directional D-Pad, A, B, select, and
start buttons.
Links
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Nintendo - www.nintendo.com
NES World - nesworld.parodius.com
The Warp Zone - www.classicgaming.com/thewarpzone
MESS Emulation State
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The NES driver should run most of the images currently
out there with very little problem. It doesn't yet
support the obscure one-game mappers used by many
"pirate carts".
The NES driver has quite accurate sound and sample
playback. For example, you can hear speech samples in
Bayou Billy, Gauntlet, Dirty Harry, and Skate or Die
that are not present in a few other NES emulators.
The main focus up until this point has been in getting
the NES driver as accurate as possible.
Unfortunately, the scanline rendering method is quite
slow, so future efforts will be focusing on bringing
up the speed.
Wanted: I'd appreciate any info on some of the more
obscure mappers. If you have any of this, please drop
me a line at bradman@pobox.com