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@ -3,7 +3,7 @@
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Optimized Linux Logo in 6502 assembly language for size.
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Size: 654 ($28E) bytes
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Size: 625 ($271) bytes
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# Screenshots
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30
linuxlogo.s
30
linuxlogo.s
@ -19,6 +19,7 @@ zUnpackBits = $FE ; 16-bit unpack
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; ROM
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HOME = $FC58
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COUT = $FDED
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IB_HGR = $D000 ; Integer BASIC ][ only
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AS_HGR = $F3E2 ; Applesoft BASIC ][+ or newer
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BASCALC = $FBC1 ; A=Row, Calculate BASL,BASH text start-of-line address
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@ -44,7 +45,7 @@ CONFIG_PRINT_CPUINFO = 1
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ORG $900
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Main
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jsr HOME
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jsr HOME ; For asethetics
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; ------------------------------------------------------------------------
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; Apple II Technical Note #7
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@ -194,24 +195,16 @@ UnpackDone
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DO CONFIG_PRINT_CPUINFO
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txa ; (2) X=$14 from (1) Unpack2Bits
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jsr BASCALC ; but we can't see it since we are in mixed mode
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ldx #0 ; This means we have an extra "row" of HGR garbage at Y=160
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PrintText ; but we can't see it since we are in mixed mode
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jsr BASCALC
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ldy #0
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CopyTextLine
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lda TextLine,X
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sta (zTxtPtr),Y
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inx ; 3*40 = 120 chars max
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iny
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cpy #40
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jsr COUT
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inx
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cpx #106 ; 3 rows of 40-col text but stop at col 27
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bne CopyTextLine
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inc zCursorY
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lda zCursorY
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cmp #$17 ; Rows $14..$16 (inclusive)
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bne PrintText
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dec zCursorY
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rts
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FIN
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; ========================================================================
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@ -333,6 +326,7 @@ Copy7x8
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ldx zCursorY ; (1) X=14, see (2)
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cpx #$14 ; Y=$40 .. $A0, Rows $8..$13 (inclusive)
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FitSameByte
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sta zDstShift
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ldy zSrcOffset ; NOTE: C=0 from CMPs above
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@ -348,9 +342,9 @@ ModType = * + 24 + 40*2
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; Uppercase in case of Apple ][ without lowercase support
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; 1 2 3
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TextLine ;0123456789012345678901234567890123456789
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ASC " LINUX VERSION 2.6.22.6, COMPILED 2007 " ; Row $14
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ASC " ONE 1.02MHZ 65C02 PROCESSOR, 128KB RAM " ; Row $15
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ASC " APPLE //e " ; Row $16
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ASC " LINUX VERSION 2.6.22.6, COMPILED 2007 " ; Row $14 +40 = 40
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ASC " ONE 1.02MHZ 65C02 PROCESSOR, 128KB RAM " ; Row $15 +40 = 80
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ASC " APPLE //e " ; Row $16 +26 = 106 chars
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; ^ ^ ^
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; CPUTYPE MOD RAM
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BIN
ll_6502.dsk
BIN
ll_6502.dsk
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