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More P500 support
git-svn-id: svn://svn.cc65.org/cc65/trunk@920 b7a2c559-68d2-44c3-8de9-860c34a00d81
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cuz
parent
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commit
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@ -17,6 +17,8 @@ OBJS = _scrsize.o \
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cgetc.o \
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clrscr.o \
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color.o \
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conio.o \
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cputc.o \
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crt0.o \
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kbhit.o \
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kirq.o \
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@ -18,19 +18,26 @@
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sta CURS_Y
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jsr plot ; Set cursor to top left corner
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ldx #4
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ldy #$00
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lda #$20 ; Screencode for blank
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L1: sta (CharPtr),y
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iny
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bne L1
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inc CharPtr+1
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dex
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bne L1
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jmp plot ; Set screen pointer again
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ldx #$00
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ldy #$00
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jsr clearpage
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jsr clearpage
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jsr clearpage
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ldx #<(40*25)
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jsr clearpage ; Clear remainder of last page
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jmp plot ; Set screen pointer again
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.endproc
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.proc clearpage
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@L1: sta (SCREEN_PTR),y
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iny
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dex
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bne @L1
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inc SCREEN_PTR+1
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rts
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.endproc
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10
libsrc/cbm510/conio.s
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10
libsrc/cbm510/conio.s
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@ -0,0 +1,10 @@
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;
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; Ullrich von Bassewitz, 14.09.2001
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;
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; Low level stuff for screen output/console input
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;
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.exportzp CURS_X, CURS_Y
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.include "zeropage.inc"
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109
libsrc/cbm510/cputc.s
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109
libsrc/cbm510/cputc.s
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@ -0,0 +1,109 @@
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;
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; Ullrich von Bassewitz, 14.09.2001
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;
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; void cputcxy (unsigned char x, unsigned char y, char c);
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; void cputc (char c);
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;
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.export _cputcxy, _cputc, cputdirect, putchar
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.export newline, plot
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.import popa, _gotoxy
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.import xsize, revers
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.include "zeropage.inc"
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.include "../cbm/cbm.inc"
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; ------------------------------------------------------------------------
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;
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_cputcxy:
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pha ; Save C
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jsr popa ; Get Y
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jsr _gotoxy ; Set cursor, drop x
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pla ; Restore C
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; Plot a character - also used as internal function
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_cputc: cmp #$0A ; CR?
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bne L1
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lda #0
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sta CURS_X
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beq plot ; Recalculate pointers
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L1: cmp #$0D ; LF?
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beq newline ; Recalculate pointers
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; Printable char of some sort
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cmp #' '
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bcc cputdirect ; Other control char
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tay
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bmi L10
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cmp #$60
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bcc L2
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and #$DF
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bne cputdirect ; Branch always
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L2: and #$3F
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cputdirect:
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jsr putchar ; Write the character to the screen
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; Advance cursor position
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advance:
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iny
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cpy xsize
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bne L3
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jsr newline ; new line
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ldy #0 ; + cr
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L3: sty CURS_X
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rts
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newline:
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clc
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lda xsize
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adc SCREEN_PTR
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sta SCREEN_PTR
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bcc L4
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inc SCREEN_PTR+1
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clc
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L4: lda xsize
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adc CRAM_PTR
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sta CRAM_PTR
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bcc L5
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inc CRAM_PTR+1
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L5: inc CURS_Y
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rts
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; Handle character if high bit set
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L10: and #$7F
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cmp #$7E ; PI?
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bne L11
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lda #$5E ; Load screen code for PI
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bne cputdirect
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L11: ora #$40
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bne cputdirect
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; Set cursor position, calculate RAM pointers
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plot: ldy CURS_X
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ldx CURS_Y
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clc
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jmp PLOT ; Set the new cursor
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; Write one character to the screen without doing anything else, return X
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; position in Y
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putchar:
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ora revers ; Set revers bit
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ldy CURS_X
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sta (SCREEN_PTR),y ; Set char
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ldx IndReg
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lda #$0F
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sta IndReg
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lda CHARCOLOR
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sta (CRAM_PTR),y ; Set color
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stx IndReg
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rts
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@ -176,34 +176,6 @@ L3: lda (ptr1),y
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iny
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bne L3
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; Reprogram the VIC so that the text screen is at $F800 in the execution bank
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; Place the VIC video RAM into bank 0
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; CA (STATVID) = 0
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ldy #tpiCtrlReg
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lda (tpi1),y
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and #$CF
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ora #$20
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sta (tpi1),y
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; Set bit 14/15 of the VIC address range to the high bits of VIDEO_RAM
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; PC6/PC7 (VICBANKSEL 0/1) = 11
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ldy #tpiPortC
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lda (tpi2),y
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and #$3F
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ora #((>VIDEO_RAM) & $C0)
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sta (tpi2),y
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; Set bits 10-13 of the VIC address range to address F800
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ldy #VIC_VIDEO_ADR
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lda (vic),y
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and #$0F
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ora #(((>VIDEO_RAM) & $3F) << 2)
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sta (vic),y
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; Set the indirect segment to bank we're executing in
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lda ExecReg
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@ -263,10 +235,52 @@ Z4:
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; This code is in page 2, so we may now start calling subroutines safely,
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; since the code we execute is no longer in the stack page.
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; Clear the video memory
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; Clear the video memory. We will do this before switching the video to bank 0
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; to avoid garbage when doing so.
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jsr _clrscr
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; Reprogram the VIC so that the text screen is at $F800 in the execution bank
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; This is done in three steps:
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lda #$0F ; We need access to the system bank
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sta IndReg
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; Place the VIC video RAM into bank 0
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; CA (STATVID) = 0
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ldy #tpiCtrlReg
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lda (tpi1),y
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sta vidsave+0
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and #$CF
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ora #$20
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sta (tpi1),y
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; Set bit 14/15 of the VIC address range to the high bits of VIDEO_RAM
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; PC6/PC7 (VICBANKSEL 0/1) = 11
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ldy #tpiPortC
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lda (tpi2),y
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sta vidsave+1
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and #$3F
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ora #((>VIDEO_RAM) & $C0)
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sta (tpi2),y
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; Set bits 10-13 of the VIC address range to address F800
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ldy #VIC_VIDEO_ADR
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lda (vic),y
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sta vidsave+2
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and #$0F
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ora #(((>VIDEO_RAM) & $3F) << 2)
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sta (vic),y
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; Switch back to the execution bank
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lda ExecReg
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sta IndReg
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; Call module constructors
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jsr initlib
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@ -359,6 +373,25 @@ Start:
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_exit: jsr donelib ; Run module destructors
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; We need access to the system bank now
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lda #$0F
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sta IndReg
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; Switch back the video to the system bank
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ldy #tpiCtrlReg
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lda vidsave+0
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sta (tpi1),y
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ldy #tpiPortC
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lda vidsave+1
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sta (tpi2),y
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ldy #VIC_VIDEO_ADR
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lda vidsave+2
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sta (vic),y
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; Clear the start of the zero page, since it will be interpreted as a
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; (garbage) BASIC program otherwise. This is also the default entry for
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; the break vector.
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@ -373,8 +406,6 @@ Clear: sta $02,x
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; Setup the welcome code at the stack bottom in the system bank. Use
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; the F4/F5 vector to access the system bank
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lda #$0F
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sta IndReg
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ldy #$00
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sty $F4
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iny
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@ -445,6 +476,6 @@ k_settim:
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.data
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spsave: .res 1
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vidsave:.res 3
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@ -154,5 +154,5 @@ VIC_BG_COLOR3 = $24
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; Out video memory address
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VIDEO_RAM = $F800
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COLOR_RAM = $D400
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@ -10,57 +10,32 @@
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.include "zeropage.inc"
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.include "io.inc"
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.macpack generic
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; ------------------------------------------------------------------------
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;
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.proc k_plot
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bcc set
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ldx CURS_Y
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ldy CURS_X
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rts
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bcs get
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set: stx CURS_Y
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stx CURS_Y
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sty CURS_X
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lda LineLSBTab,x
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sta CharPtr
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lda LineMSBTab,x
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sta CharPtr+1
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lda LineLSBTab,x
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sta SCREEN_PTR
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sta CRAM_PTR
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lda LineMSBTab,x
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sta SCREEN_PTR+1
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sub #>VIDEO_RAM
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add #>COLOR_RAM
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sta CRAM_PTR+1
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.if 0
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lda IndReg
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pha
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lda #$0F
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sta IndReg
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get: ldx CURS_Y
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ldy CURS_X
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ldy #$00
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clc
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sei
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sta (crtc),y
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lda CharPtr
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adc CURS_X
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iny
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sta (crtc),y
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dey
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lda #$0E
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sta (crtc),y
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iny
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lda (crtc),y
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and #$F8
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sta sedt1
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lda CharPtr+1
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adc #$00
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and #$07
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ora sedt1
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sta (crtc),y
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cli
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pla
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sta IndReg
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.endif
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rts
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.endproc
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; -------------------------------------------------------------------------
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@ -67,7 +67,7 @@ PgmKeyBuf = $C0
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PgmKeyPtr = $C2
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sedsal = $C4
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sedeal = $C6
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CharPtr = $C8
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SCREEN_PTR = $C8
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CURS_Y = $CA
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CURS_X = $CB
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GrafMode = $CC
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@ -95,7 +95,7 @@ NorKey = $E1
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BitTable = $E2
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BlinkOn = $E6
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BlinkCounter = $E7
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ColorRamPtr = $E8
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CRAM_PTR = $E8
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TempColor = $EA
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BlinkSwitch = $EB
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CHARCOLOR = $EC
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