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CPU Test. * Push any button to continue!SMS VDP data test SMS VDP misc test SMS VDP sprite test MegaDrive VDP data test MegaDrive VDP misc test MegaDrive VDP sprite test HCount values should be between $EA & $93, every third value repeated once.HCounter Values: HCount values for HBlank should be between $83 & $86. VBlank should be between $7D & $80. Line value: HBlank value: VBlank value:Registers Startup Values Normal read/write: Read after code1 wr: Read after code2 wr: Read after code3 wr: Write after code0 wr: Write after code2 wr: Write after code3 wr: Mixed read/write: VRAM wr set VDPbuffer: VRAM wr keep VDPbuffer:CRAM wr set VDPbuffer: CRAM wr keep VDPbuffer:1byte wr sets rd adr: 1byte wr keeps rd adr: 1byte wr sets wr adr: 1byte wr keeps wr adr: 1byte wr keeps wr mode:Address wraps at $3FFF:VRAM & CRAM share adr: Rd VDPCtrl reset latch:Rd VDPData reset latch:Wr VDPData reset latch:Unused regs, no effect:VCounter values:HCounter keeps value:HC change on TH 0->1:HCounter correct: VCounter chg time: VDP Register mirrors:VDP data mirrors: VDP ctrl mirrors: VCounter mirrors: HCounter mirrors: Frame IRQ VCount: Frame IRQ HCount: Line IRQ VCount: Line IRQ HCount: VINT flag HCount: VINT flag keept: No sprite collision: No disp, no spr col: 9th sprite no col: Transp pixl, no col: Offscreen X, no col: Offscreen Y, col: Offscreen Y, no col: Sprite collision: Colflag keept in vbl:Spr col behind tile: Spr col correct line:Spr col many lines: Spr col correct HC: No sprite overflow: No disp, spr ovr: No disp, no spr ovr: Offscreen Y, no ovr: Sprite overflow: Ovrflag keept in vbl:Spr ovr correct line:Spr ovr many lines: Spr ovr correct HC: Z80 SP: $Z80 IR: $Z80 AF: $Z80 BC: $Z80 DE: $Z80 HL: $Z80 IX: $Z80 IY: $Z80 AF': $Z80 BC': $Z80 DE': $Z80 HL': $Z80 IFF2: $VDP VC: $VDP HC: $Stack val:$Adr val: $ Ok. Error. PAL Ok. NTSC Ok.  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