Main CPU : 68EC020 @ 24MHz
Sound CPU : 68000 @ 16MHz
There are actually 2 revisions of GX motherboard, they are totally interchangable and the Version 2 motherboard is just smaller, has 1 fewer custom chips, was cheaper to produce, cooler and used less power.
Ver. 1 Motherboard | Ver. 2 Motherboard | Graphics chips : 54156, 56832, 55555, 53246, 055673, 54338
Sound chip : 056800, 2 x 054539 (PCM, 8 Ch) and TMS57002 (effects DSP) | Graphics chips : 58143, 56832, 55555, 58142, 55673, 58144. (58143 replaces 54156, 58142 replaces 53246, 58144 replaces 54338. All are completely compatible with their predecessors, just smaller)
Sound chip : 056800, 058141, TMS57002 (58141 is 2 x 54539s on one smaller chip) |
Standard GX Features :
4 scroll layers plus a sprite layer with alpha blending and linescrolling
Board composition : Main board with additional video board.
Optional GX Features :
Has 4 optional add-on video boards for the system which have varying graphical capibilitys, these are called Type1, Type2, Type3 and Type4
Type 1 : Adds 53936 (3D ground chip), analog controls.
Type 2 : Standard board, comes with and without protection.
Type 3 : Adds 53936 (3D ground chip), no analog inputs.
Type 4 : Adds 53936 (3D ground chip), dual-monitor output.
Pictures : Main Board - Other Main Board - Type 2 - Type 3 - Type 4
Emulators : MAME
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