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********************* * TIA Documentation * ********************* -------------------------------------- TIA Addressing Notes for the Atari VCS -------------------------------------- A12 is connected to /CS0 (Chip Select 0 - active low) A7 is connected to /CS3 (Chip Select 3 - active low) A[11:8] and A6 are not connected to the TIA VCC is connected to CS1 (Chip Select 1 - active high) GND is connected to /CS2 (Chip Select 2 - active low) -------------------------------------------- $0000 - $003F = TIA.......(write)......(read) -------------------------------------------- $0000 = TIA Address $00 - (VSYNC)......(CXM0P) $0001 = TIA Address $01 - (VBLANK).....(CXM1P) $0002 = TIA Address $02 - (WSYNC)......(CXP0FB) $0003 = TIA Address $03 - (RSYNC)......(CXP1FB) $0004 = TIA Address $04 - (NUSIZ0).....(CXM0FB) $0005 = TIA Address $05 - (NUSIZ1).....(CXM1FB) $0006 = TIA Address $06 - (COLUP0).....(CXBLPF) $0007 = TIA Address $07 - (COLUP1).....(CXPPMM) $0008 = TIA Address $08 - (COLUPF).....(INPT0) $0009 = TIA Address $09 - (COLUBK).....(INPT1) $000A = TIA Address $0A - (CTRLPF).....(INPT2) $000B = TIA Address $0B - (REFP0)......(INPT3) $000C = TIA Address $0C - (REFP1)......(INPT4) $000D = TIA Address $0D - (PF0)........(INPT5) $000E = TIA Address $0E - (PF1)........(UNDEFINED) $000F = TIA Address $0F - (PF2)........(UNDEFINED) $0010 = TIA Address $10 - (RESP0)......(CXM0P) $0011 = TIA Address $11 - (RESP1)......(CXM1P) $0012 = TIA Address $12 - (RESM0)......(CXP0FB) $0013 = TIA Address $13 - (RESM1)......(CXP1FB) $0014 = TIA Address $14 - (RESBL)......(CXM0FB) $0015 = TIA Address $15 - (AUDC0)......(CXM1FB) $0016 = TIA Address $16 - (AUDC1)......(CXBLPF) $0017 = TIA Address $17 - (AUDF0)......(CXPPMM) $0018 = TIA Address $18 - (AUDF1)......(INPT0) $0019 = TIA Address $19 - (AUDV0)......(INPT1) $001A = TIA Address $1A - (AUDV1)......(INPT2) $001B = TIA Address $1B - (GRP0).......(INPT3) $001C = TIA Address $1C - (GRP1).......(INPT4) $001D = TIA Address $1D - (ENAM0)......(INPT5) $001E = TIA Address $1E - (ENAM1)......(UNDEFINED) $001F = TIA Address $1F - (ENABL)......(UNDEFINED) $0020 = TIA Address $20 - (HMP0).......(CXM0P) $0021 = TIA Address $21 - (HMP1).......(CXM1P) $0022 = TIA Address $22 - (HMM0).......(CXP0FB) $0023 = TIA Address $23 - (HMM1).......(CXP1FB) $0024 = TIA Address $24 - (HMBL).......(CXM0FB) $0025 = TIA Address $25 - (VDELP0).....(CXM1FB) $0026 = TIA Address $26 - (VDELP1).....(CXBLPF) $0027 = TIA Address $27 - (VDELBL).....(CXPPMM) $0028 = TIA Address $28 - (RESMP0).....(INPT0) $0029 = TIA Address $29 - (RESMP1).....(INPT1) $002A = TIA Address $2A - (HMOVE)......(INPT2) $002B = TIA Address $2B - (HMCLR)......(INPT3) $002C = TIA Address $2C - (CXCLR)......(INPT4) $002D = TIA Address $2D - (UNDEFINED)..(INPT5) $002E = TIA Address $2E - (UNDEFINED)..(UNDEFINED) $002F = TIA Address $2F - (UNDEFINED)..(UNDEFINED) $0030 = TIA Address $30 - (UNDEFINED)..(CXM0P) $0031 = TIA Address $31 - (UNDEFINED)..(CXM1P) $0032 = TIA Address $32 - (UNDEFINED)..(CXP0FB) $0033 = TIA Address $33 - (UNDEFINED)..(CXP1FB) $0034 = TIA Address $34 - (UNDEFINED)..(CXM0FB) $0035 = TIA Address $35 - (UNDEFINED)..(CXM1FB) $0036 = TIA Address $36 - (UNDEFINED)..(CXBLPF) $0037 = TIA Address $37 - (UNDEFINED)..(CXPPMM) $0038 = TIA Address $38 - (UNDEFINED)..(INPT0) $0039 = TIA Address $39 - (UNDEFINED)..(INPT1) $003A = TIA Address $3A - (UNDEFINED)..(INPT2) $003B = TIA Address $3B - (UNDEFINED)..(INPT3) $003C = TIA Address $3C - (UNDEFINED)..(INPT4) $003D = TIA Address $3D - (UNDEFINED)..(INPT5) $003E = TIA Address $3E - (UNDEFINED)..(UNDEFINED) $003F = TIA Address $3F - (UNDEFINED)..(UNDEFINED)