added size optimized monochrom soft80 driver

libsrc/c64/extra/soft80mono.s

@@ -0,0 +1,55 @@
+;
+; Groepaz/Hitmen, 19.10.2015
+;
+; import/overload stubs for the monochrome soft80 implementation
+;
+; - optimized for size, almost 1k smaller footprint than the full color version
+; - textcolor() sets one common text color for the whole screen
+;
+        .include "../soft80.inc"
+
+        ; soft80mono_cgetc.s
+        .import soft80mono_cgetc
+        .export _cgetc := soft80mono_cgetc              ; cgetc.s
+
+        ; soft80mono_color.s
+        .import soft80mono_textcolor
+        .import soft80mono_bgcolor
+        .export _textcolor := soft80mono_textcolor      ; color.s
+        .export _bgcolor := soft80mono_bgcolor          ; color.s
+
+        ; soft80mono_cputc.s
+        .import soft80mono_cputc
+        .import soft80mono_cputcxy
+        .import soft80mono_cputdirect
+        .import soft80mono_putchar
+        .import soft80mono_newline
+        .import soft80mono_plot
+        .export _cputc := soft80mono_cputc              ; cputc.s
+        .export _cputcxy := soft80mono_cputcxy          ; cputc.s
+        .export cputdirect := soft80mono_cputdirect     ; cputc.s
+        .export putchar := soft80mono_putchar           ; cputc.s
+        .export newline := soft80mono_newline           ; cputc.s
+        .export plot := soft80mono_plot                 ; cputc.s
+
+        ; soft80mono_kclrscr.s
+        .import soft80mono_kclrscr
+        .export _clrscr := soft80mono_kclrscr           ; clrscr.s
+        .export CLRSCR := soft80mono_kclrscr            ; kernal func (c64.inc)
+
+        ; soft80mono_kplot.s
+        .import soft80mono_kplot
+        .export PLOT := soft80mono_kplot                ; kplot.s
+
+        ; soft80_kscreen.s
+        .import soft80_screensize
+        .export screensize := soft80_screensize         ; _scrsize.s
+        .export SCREEN := soft80_screensize             ; kernal func (kernal.s)
+
+        ; VIC sprite data for the mouse pointer
+        .export         mcb_spritememory  := soft80_spriteblock
+        .export         mcb_spritepointer := (soft80_vram + $03F8)
+
+        ; Chars used by chline () and cvline ()
+        .exportzp       chlinechar = CH_HLINE
+        .exportzp       cvlinechar = CH_VLINE