a bunch of simple conio fixes, makes a few more samples work

libsrc/mega65/_scrsize.s

@@ -0,0 +1,12 @@
+;
+; Ullrich von Bassewitz, 26.10.2000
+;
+; Screen size variables
+;
+
+        .export         screensize
+        .import         SCREEN
+
+screensize      = SCREEN
+
+

libsrc/mega65/bordercolor.s

@@ -0,0 +1,17 @@
+;
+; Ullrich von Bassewitz, 06.08.1998
+;
+; unsigned char __fastcall__ bordercolor (unsigned char color);
+;
+
+
+        .export         _bordercolor
+
+        .include        "mega65.inc"
+
+_bordercolor:
+        ldx     VIC_BORDERCOLOR ; get old value
+        sta     VIC_BORDERCOLOR ; set new value
+        txa
+        rts
+

libsrc/mega65/clrscr.s

@@ -0,0 +1,15 @@
+;
+; Ullrich von Bassewitz, 06.08.1998
+;
+; void clrscr (void);
+;
+
+        .export         _clrscr
+
+        .include        "cbm_kernal.inc"
+
+;_clrscr = CLRSCR
+
+_clrscr:
+        lda #$93
+        jmp CHROUT

libsrc/mega65/color.s

@@ -0,0 +1,24 @@
+;
+; Ullrich von Bassewitz, 06.08.1998
+;
+; unsigned char __fastcall__ textcolor (unsigned char color);
+; unsigned char __fastcall__ bgcolor (unsigned char color);
+;
+
+
+        .export         _textcolor, _bgcolor
+
+        .include        "mega65.inc"
+
+_textcolor:
+        ldx     CHARCOLOR       ; get old value
+        sta     CHARCOLOR       ; set new value
+        txa
+        rts
+
+
+_bgcolor:
+        ldx     VIC_BG_COLOR0   ; get old value
+        sta     VIC_BG_COLOR0   ; set new value
+        txa
+        rts

libsrc/mega65/conio.s

@@ -0,0 +1,10 @@
+;
+; Ullrich von Bassewitz, 06.08.1998
+;
+; Low level stuff for screen output/console input
+;
+
+        .exportzp       CURS_X, CURS_Y
+
+        .include        "mega65.inc"
+

libsrc/mega65/cputc.s

@@ -0,0 +1,118 @@
+;
+; Ullrich von Bassewitz, 1998-08-06, 2009-09-26
+;
+; void __fastcall__ cputcxy (unsigned char x, unsigned char y, char c);
+; void __fastcall__ cputc (char c);
+;
+
+        .export         _cputcxy, _cputc, cputdirect, putchar
+        .export         newline, plot
+        .import         gotoxy
+        .import         PLOT
+
+        .include        "mega65.inc"
+
+
+_cputcxy:
+        pha                     ; Save C
+        jsr     gotoxy          ; Set cursor, drop x and y
+        pla                     ; Restore C
+
+; Plot a character - also used as internal function
+
+_cputc: cmp     #$0A            ; CR?
+        bne     L1
+        lda     #0
+        sta     CURS_X
+        beq     plot            ; Recalculate pointers
+
+L1:     cmp     #$0D            ; LF?
+        beq     newline         ; Recalculate pointers
+
+; Printable char of some sort
+
+        cmp     #' '
+        bcc     cputdirect      ; Other control char
+        tay
+        bmi     L10
+        cmp     #$60
+        bcc     L2
+        and     #$DF
+        bne     cputdirect      ; Branch always
+L2:     and     #$3F
+
+cputdirect:
+        jsr     putchar         ; Write the character to the screen
+
+; Advance cursor position
+
+advance:
+        iny
+        cpy     #XSIZE
+        bne     L3
+        jsr     newline         ; new line
+        ldy     #0              ; + cr
+L3:     sty     CURS_X
+        rts
+
+newline:
+        clc
+        lda     #XSIZE
+        adc     SCREEN_PTR
+        sta     SCREEN_PTR
+        bcc     L4
+        inc     SCREEN_PTR+1
+        clc
+L4:     lda     #XSIZE
+        adc     CRAM_PTR
+        sta     CRAM_PTR
+        bcc     L5
+        inc     CRAM_PTR+1
+L5:     inc     CURS_Y
+        rts
+
+; Handle character if high bit set
+
+L10:    and     #$7F
+        cmp     #$7F            ; PI?
+        bne     L11
+        lda     #$5E            ; Load screen code for PI
+L11:    ora     #$40
+        bne     cputdirect
+
+
+
+; Set cursor position, calculate RAM pointers.
+
+plot:   ldy     CURS_X
+        ldx     CURS_Y
+        clc
+        jmp     PLOT            ; Set the new cursor
+
+
+
+; Write one character to the screen without doing anything else, return X
+; position in Y
+
+putchar:
+        ora     RVS             ; Set revers bit
+        ldy     CURS_X
+
+        pha
+        lda     SCREEN_PTR + 1
+        clc
+        adc     #>$0800
+        sta     SCREEN_PTR + 1
+        pla
+
+        sta     (SCREEN_PTR),y  ; Set char
+
+        lda     SCREEN_PTR + 1
+        sec
+        sbc     #>$0800
+        sta     SCREEN_PTR + 1
+
+        lda     CHARCOLOR
+;        lda #$88
+;        sta     (CRAM_PTR),y    ; Set color
+        rts

libsrc/mega65/devnum.s

@@ -0,0 +1,7 @@
+;
+; Oliver Schmidt, 2010-02-14
+;
+
+        .include        "mega65.inc"
+
+        .exportzp       devnum := DEVNUM

libsrc/mega65/kbhit.s

@@ -0,0 +1,24 @@
+
+
+       ; FIXME: is $d610 mega65 specific?
+       ; FIXME: this should rather use the kernal (with keyboard buffer etc)
+
+        .export _cgetc
+_cgetc:
+
+:       lda $d610
+        beq :-
+        ldx #0
+        stx $d610
+        rts
+
+        .export _kbhit
+_kbhit:
+        lda $d610
+        beq :+
+
+        lda #1
+:
+        ldx #0
+        rts
+

libsrc/mega65/status.s

@@ -0,0 +1,5 @@
+;
+; Oliver Schmidt, 2012-09-30
+;
+
+        .exportzp       ST := $90       ; IEC status byte