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https://github.com/Michaelangel007/apple2_printm.git
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Ver 10
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Michaelangel007
parent
53703c76dc
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176
printm.s
176
printm.s
@ -1,4 +1,4 @@
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; Version 9
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; Version 10
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; ca65
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.feature c_comments
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@ -65,6 +65,11 @@
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LDX #<DATA ; Low Byte of Address
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LDY #>DATA ; High Byte of Address
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JSR PrintM
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LDX #<DATA2
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LDY #>DATA2
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JSR PrintM
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RTS
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ReverseByte
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@ -78,7 +83,7 @@ ReverseBit
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RTS
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TEXT
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;byte "X=## Y=ddd $=xxxx:@@ %%%%%%%%~????????"
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APPLE "X="
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.byte "#"
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APPLE " Y="
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@ -103,13 +108,47 @@ DATA
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dw $DA1A ; aArg[ 5] bits
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dw $DA1A ; aArg[ 6] bits
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TEXT2
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;byte "Byte=b b b b Str=s,s"
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APPLE "Byte="
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.byte "b"
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APPLE " "
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.byte "b"
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APPLE " "
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.byte "b"
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APPLE " "
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.byte "b"
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APPLE " Str="
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.byte "s"
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APPLE ","
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.byte "s"
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db 0
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TEXT_HELLO
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APPLE "HELLO "
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db 0
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TEXT_WORLD
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APPLE "HELLO "
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db 0
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DATA2
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dw $0500 ; Screen Dst
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dw TEXT2
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dw $80 ; -128
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dw $FF ; -1
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dw $00 ; 0
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dw $7F ; +127
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dw TEXT_HELLO
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dw TEXT_WORLD
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; Pad until end of page so PrintM starts on new page
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ds 256 - <*
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/*
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/*
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Problem:
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We want to print this ...
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.byte "X=## Y=### $=####:@@ %%%%%%%%~????????"
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@ -171,11 +210,11 @@ PrintM
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STY _pArg+1
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STZ _iArg
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JSR NxtArgXY
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JSR NxtArgYX
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STX _pScreen+0 ; lo
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STY _pScreen+1 ; hi
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NextArg
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JSR NxtArgXY
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JSR NxtArgYX
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STX _pFormat+0 ; lo
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STY _pFormat+1 ; hi
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BRA GetFormat ; always
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@ -190,7 +229,7 @@ PrintHex2
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LDA #2
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_PrintHex
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STA _nHexWidth
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JSR NxtArgXY
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JSR NxtArgYX
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; Print 16-bit Y,X in hex
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; Uses _nHexWidth to limit output width
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@ -246,7 +285,7 @@ PrintPtr2
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LDA #2
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_PrintPtr
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STA _nHexWidth
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JSR NxtArgXY
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JSR NxtArgYX
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; 13 bytes - zero page version
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STX temp+0 ; zero-page for (ZP),Y
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@ -318,7 +357,7 @@ PrintDec2
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LDA #2 ; 2 digits
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_PrintDec
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STA _nDecWidth
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JSR NxtArgXY
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JSR NxtArgYX
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PrintDecYX
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STX _val+0
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@ -355,21 +394,21 @@ BCD2Char
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LDX #2
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LDY #5
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_BCD2Char
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LDA _bcd,X ; ab?def a?_dXX ?_YYXX
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LDA _bcd,X ; __c??? _b_?XX a_YYXX
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LSR
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LSR
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LSR
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LSR
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CLC
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ADC #'0' + $80
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STA _bcd,Y ; ab?deX a?_YXX ?ZYYXX
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ADC #'0'+$80
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STA _bcd,Y ; __c??X _b_YXX aZYYXX
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DEY
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LDA _bcd,X ; ab?deX a?_YXX ?ZYYXX
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LDA _bcd,X ; __c??X _b_YXX aZYYXX
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AND #$F
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CLC
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ADC #'0' + $80
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STA _bcd,Y ; ab?dXX a?YYXX ZZYYXX
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ADC #'0'+$80
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STA _bcd,Y ; __c?XX _bYYXX ZZYYXX
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DEY
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DEX
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BPL _BCD2Char
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@ -389,7 +428,7 @@ PrintBinAsc
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LDA #$01
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_PrintBin
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STA _PrintBit+1
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JSR NxtArgXY ; X = low byte
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JSR NxtArgYX ; X = low byte
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LDY #8 ; print 8 bits
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_Bit2Asc
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@ -410,28 +449,74 @@ _JumpNextFormat
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; BRA NextFormat ; always
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JMP NextFormat ; JMP :-(
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; ___ Utility ___
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/*
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_CmpMeta = CmpMeta+1
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; ======================================================================
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PrintByte
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; JMP PrintHex4 ; DEBUG
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GetWidth
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STA _CmpMeta ; save last meta
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LDA _pFormat+0 ; Src.Lo
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LDY _pFormat+1 ; Src.Hi
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STA IncWidth+1 ; Dst.Lo
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STY IncWidth+2 ; Dst.Hi
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JSR NxtArgYX ; X = low byte
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TXA
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BPL PrintBytePos
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LDA #'-' + $80 ; X >= $80 --> $80 (-128) .. $FF (-1)
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JSR PutChar
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TXA
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EOR #$FF ; 2's complement
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AND #$7F
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CLC
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ADC #$01
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PrintBytePos
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TAX
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LDY #0
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IncWidth
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LDA $C0DE,Y ; NOTE: self-modifying!
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STY _nHexWidth
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CmpMeta
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CMP #$00 ; _CmpMeta NOTE: self-modifying!
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BNE _Done ; optimization: re-use RTS
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LDY #00 ; 00XX
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LDA #3 ; 3 digits max
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STA _nDecWidth
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JMP PrintDecYX
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; ======================================================================
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PrintStrP
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; JMP PrintHex4 ; DEBUG
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JSR NxtArgYX ; X = low byte
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STX temp+0 ; zero-page for (ZP),Y
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STY temp+1
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LDY #$0
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LDA (temp),Y
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TAX
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_PrintStrP
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INY
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BRA IncWidth
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*/
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LDA (temp),Y
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JSR PutChar
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DEX
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BNE _PrintStrP
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BEQ _JumpNextFormat ; always
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; ======================================================================
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PrintStrC
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JMP PrintHex4 ; DEBUG
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JSR NxtArgYX ; X = low byte
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STX temp+0 ; zero-page for (ZP),Y
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DEY
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STY temp+1
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; We could use BIT $ABS to skip next INC temp+1 instruction
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; but since we need to waste a byte anyways
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; we use a DEY instead
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; .byte $2C ; BIT $abs -- skip next instruction
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@_NextPage
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INC temp+1
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LDY #$0
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@_NextByte
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LDA (temp),Y
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BEQ _JumpNextFormat
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JSR PutChar
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INC temp+0
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BNE @_NextByte
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BEQ @_NextPage
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; __________ Utility __________
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; ======================================================================
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PutChar
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@ -439,14 +524,12 @@ PutChar
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INC PutChar+1 ; inc lo
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RTS
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; @return &aArg[ iArg ] -> XY
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; ======================================================================
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GetArgAddr
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LDX _pArg+0 ; Low Byte
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LDY _pArg+1 ; High Byte
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RTS
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; @return next arg as 16-bit arg value in Y,X
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NxtArgYX
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JSR NxtArgByte
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TAX
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; ======================================================================
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; @return _Arg[ _Num ]
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NxtArgByte
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LDY #00 ; _iArg NOTE: self-modifying!
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@ -456,14 +539,7 @@ IncArg
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BNE @_SamePage
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INC _pArg+1 ;
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@_SamePage
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RTS
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; ======================================================================
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; @return X,Y 16-bit arg value
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NxtArgXY
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JSR NxtArgByte
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TAX
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JSR NxtArgByte
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TAY
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RTS
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@ -476,6 +552,9 @@ MetaChar
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db '@' ; PrintPtr2
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db '?' ; PrintBinInv
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db '%' ; PrintBinAsc
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db 'b' ; PrintByte NOTE: Signed -128 .. +127
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db 'p' ; PrintStrP NOTE: Pascal string; C printf 'p' is pointer!
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db 's' ; PrintStrC NOTE: C string, zero terminated
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db 'u' ; PrintDec5
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db 'd' ; PrintDec3
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db '#' ; PrintDec2
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@ -490,6 +569,9 @@ MetaFunc
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dw PrintPtr2
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dw PrintBinInv
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dw PrintBinAsc
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dw PrintByte
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dw PrintStrP
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dw PrintStrC
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dw PrintDec5
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dw PrintDec3
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dw PrintDec2
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