GameBoySpecs.txt

Hard GB specs
-------------

CPU: 8-Bit (Similar to a Zilog Z80 Processor or Intel 8080)
Main RAM: 8k Byte ~ 8192 Bits
Video RAM: 8k Byte ~ 8192 Bits
Screen Size: 2.6"
Resolution: 160px * 144px (20px * 18px tiles) ~ 8px * 8px per tile
Max nr. of sprites: 40
Max nr. of sprites pr. line: 10
Max sprite size: 8px * 16px
Min sprite size: 8px * 8px
Clock Speed: 4.194304 MHz ~ 4.295454 MHz on SGB ~ 4.194 or 8.388MHz on GBC
Horizontal Sync: 9198 KHz ~ 9420 KHz on SGB
Vertical Sync: 59.73 Hz ~ 61.17 Hz on SGB
Sound: 4 Channels with stereo sound
Power: DC6V 0.7W ~ DC3V 0.7W on GB Pocket


*----------------*--------------*------------------*
|                | GB CPU Speed | NOP Instructions |
*----------------*--------------*------------------*
| Machine Cycles |   1.05MHz    |     1 cycle      |
*----------------*--------------*------------------*
|  Clock Cycles  |   4.19MHz    |     4 cycles     |
*----------------*--------------*------------------*


Memory Map
----------

Interupt Enable Register
--------------------------------- FFFF
Internal RAM
--------------------------------- FF80
Empty but unusable for I/O
--------------------------------- FF4C
I/O ports
--------------------------------- FF00
Empty but unusable for I/O
--------------------------------- FEA0
Sprite Attrib Memory (0AM)
--------------------------------- FE00
Echo of 8kB ~ 8196b Internal RAM
--------------------------------- E000
8kB ~ 8196b Interal RAM
--------------------------------- C000
8kB ~ 8196b switchable RAM bank
--------------------------------- A000
8kB ~ 8196b Video RAM
--------------------------------- 8000 --
16kB ~ 16392b switchable ROM bank       |
--------------------------------- 4000  | = 32 kB Cartrigde
16kB ~ 16392b ROM bank #0               |
--------------------------------- 0000 --

* NOTE: b = bit, B = Byte