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96 lines
2.1 KiB
PHP
96 lines
2.1 KiB
PHP
;
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; PCE definitions. By Groepaz/Hitmem.
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;
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;; FIXME: optimize zeropage usage
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CURS_X = $30
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CURS_Y = $31
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SCREEN_PTR = $32 ;2
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CRAM_PTR = $34 ;2
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CHARCOLOR = $36
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RVS = $37
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BGCOLOR = $38
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_tickcount = $39 ;4
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screenrows = (224/8)
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charsperline = (512/8)
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xsize = charsperline
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CH_HLINE = 7
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CH_VLINE = 7
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; huc6270 - Video Display Controller (vdc)
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VDC_MAWR = 0 ; Memory Address Write Register
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VDC_MARR = 1 ; Memory Address Read Register
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VDC_VWR = 2 ; VRAM Write Register
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VDC_VRR = 3 ; VRAM Read Register
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VDC_CR = 4 ; Control Register
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VDC_RCR = 5 ; Raster Counter Register
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VDC_BXR = 6 ; Background X-Scroll Register
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VDC_BYR = 7 ; Background Y-Scroll Register
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VDC_MWR = 8 ; Memory-access Width Register
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VDC_HSR = 9 ; Horizontal Sync Register (?)
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VDC_HDR =10 ; Horizontal Display Register (?)
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VDC_VPR =11 ; (unknown)
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VDC_VDW =12 ; (unknown use)
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VDC_VCR =13 ; (unknown use)
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VDC_DCR =14 ; (DMA) Control Register
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VDC_SOUR =15 ; (DMA) Source Register
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VDC_DESR =16 ; (DMA) Destination Register
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VDC_LENR =17 ; (DMA) Length Register
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VDC_SATB =18 ; Sprite Attribute Table
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VDC_CTRL = $0000
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VDC_DATA_LO = $0002
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VDC_DATA_HI = $0003
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; huc6260 - Video Color Encoder (vce)
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; The DAC has a palette of 512 colours.
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; bitmap of the palette data is this: 0000000gggrrrbbb.
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; You can read and write the DAC-registers.
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VCE_CTRL = $0400 ; write$00 to reset
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VCE_ADDR_LO = $0402 ; LSB of byte offset into palette
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VCE_ADDR_HI = $0403 ; MSB of byte offset into palette
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VCE_DATA_LO = $0404 ; LSB of 16-bit palette data
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VCE_DATA_HI = $0405 ; MSB of 16-bit palette data
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TIMER_COUNT = $0c00
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TIMER_CTRL = $0c01
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JOY_CTRL = $1000
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IRQ_MASK = $1402
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IRQ_STATUS = $1403
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CDR_MEM_DISABLE = $1803
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CDR_MEM_ENABLE = $1807
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;; lda abs
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.macro ldaio arg1
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.byte $ad
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.word arg1
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.endmacro
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;; sta abs
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.macro staio arg1
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.byte $8d
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.word arg1
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.endmacro
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;; stz abs
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.macro stzio arg1
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.byte $9c
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.word arg1
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.endmacro
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; Write VDC register
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.macro VREG arg1,arg2
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st0 #arg1
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st1 #<(arg2)
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st2 #>(arg2)
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.endmacro
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