Atari: add line-drawing chars in font.

Also adds a check for valid ASCII char (<= 0x7f) in ProcIn, and fixes
two typos in a2vt100.s.

drivers/a2vt100.s

@@ -1646,7 +1646,7 @@ ExitScr
 ; -------------------------------------
 ; table reverse to ScreenCode
 ;
-; This tabel is used to convert incoming
+; This table is used to convert incoming
 ; reverse chars.
 ; -------------------------------------
 
@@ -1671,7 +1671,7 @@ rtsc;_0  _1  _2  _3  _4  _5  _6  _7  _8  _9  _a  _b  _c  _d  _e  _f
 ; -------------------------------------
 ; table line drawing to ScreenCode
 ;
-; This tabel is used to convert incoming
+; This table is used to convert incoming
 ; line drawing chars.
 ; -------------------------------------
 

drivers/atrvt100.s

@@ -192,8 +192,9 @@ ProcIn  lda EMode   ; handle esc mode
         cpy #$20    ; control?
         bcc Special
         tya
+        bmi PIrts   ; ignore non-ASCII
         jsr CPrnChr ; print to screen
-        rts
+PIrts   rts
 
 ; to far for branch
 PIEsc   jmp Esc
@@ -945,7 +946,7 @@ crsrU   ldx #<ScrsrU
 C2      cmp #ATRRW
         bne C3
 
-		; crsr R
+        ; crsr R
 crsrR   ldx #<ScrsrR
         ldy #>ScrsrR
         jsr SendStr
@@ -1154,6 +1155,7 @@ PrnChr  sta xVector     ; save char
         bvc PCreg
         cmp #$60        ; line drawing char?
         bcc PCreg
+        sbc #$60        ; adapt index for table starting at offset $60
         tax
         lda ltsc,x      ; line drawing to ScreenCode
         eor Rvs
@@ -1614,37 +1616,18 @@ ExitScr
 ; -------------------------------------
 ; table line drawing to ScreenCode
 ;
-; This tabel is used to convert incoming
+; This table is used to convert incoming
-; line drawing chars.
+; line drawing chars. First entry is for
+; offset $60 (see PrnChr).
 ; -------------------------------------
 
 ltsc;_0  _1  _2  _3  _4  _5  _6  _7  _8  _9  _a  _b  _c  _d  _e  _f
 
-; --- unused -------------------------------------------------------
-.byt $00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00  ; 0_
-.byt $00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00  ; 1_
-
-; --- reverse ------------------------------------------------------
-;     ◆   ▒   ␉   ␌   ␍   ␊   °   ±   ␤   ␋   ┘   ┐   ┌   └   ┼   ⎺
-;    ' '  ▒  ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' '  |  ' ' ' '  |   |   _
-.byt $20,$57,$20,$20,$20,$20,$20,$20,$20,$20,$7c,$20,$20,$7c,$7c,$1f  ; 2_
-;     ⎻   ─   ⎼   ⎽   ├   ┤   ┴   ┬   │   ≤   ≥   π   ≠   £   ·  ' '
-;     _   _   _   _   |   |   _   _   |  ' ' ' ' ' ' ' ' ' ' ' ' ' '
-.byt $1f,$1f,$1f,$1f,$7c,$7c,$1f,$1f,$7c,$20,$20,$20,$20,$20,$20,$20  ; 3_
-
-; --- unused -------------------------------------------------------
-.byt $00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00  ; 4_
-.byt $00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00  ; 5_
-
 ; --- normal -------------------------------------------------------
 ;     ◆   ▒   ␉   ␌   ␍   ␊   °   ±   ␤   ␋   ┘   ┐   ┌   └   ┼   ⎺
-;     ◆   ▒  ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' '  ⎸  ' '  _   ⎿   ⎿   ⎺
+.byt $5b,$5c,$40,$48,$49,$4a,$4b,$50,$54,$55,$43,$45,$51,$5a,$53,$4d  ; 6_
-;.byt $5b,$56,$a0,$a0,$a0,$a0,$a0,$a0,$a0,$a0,$5f,$a0,$9f,$54,$54,$4c  ; 6_
-.byt $5b,$56,$a0,$a0,$a0,$a0,$a0,$a0,$a0,$a0,$43,$45,$51,$5a,$53,$4c  ; 6_
 ;     ⎻   ─   ⎼   ⎽   ├   ┤   ┴   ┬   │   ≤   ≥   π   ≠   £   ·  ' '
-;     ─   _   _   _   ⎿   ⎸   ⎿   _   ⎸  ' ' ' ' ' ' ' ' ' ' ' ' ' '
+.byt $4c,$52,$4f,$4e,$41,$44,$58,$57,$7c,$59,$5d,$5e,$5f,$47,$46,$00  ; 7_
-;.byt $53,$9f,$9f,$9f,$54,$5f,$54,$9f,$5f,$a0,$a0,$a0,$a0,$a0,$a0,$a0  ; 7_
-.byt $53,$52,$9f,$9f,$41,$44,$54,$9f,$7c,$a0,$a0,$a0,$a0,$a0,$a0,$a0  ; 7_
 
 ; -------------------------------------
 ; table keyboard to ASCII

drivers/atrvt100font.s

@@ -652,14 +652,22 @@ vt100_font:
   .byte %11111111
   .byte %00000000
 
-;$40 - heart card
+;$40 - original: heart card; now 'HT' (line drawing mode)
+;  .byte %00000000
+;  .byte %00110110
+;  .byte %01111111
+;  .byte %01111111
+;  .byte %00111110
+;  .byte %00011100
+;  .byte %00001000
+;  .byte %00000000
   .byte %00000000
-  .byte %00110110
+  .byte %01010000
-  .byte %01111111
+  .byte %01110000
-  .byte %01111111
+  .byte %01010000
-  .byte %00111110
+  .byte %00001110
-  .byte %00011100
+  .byte %00000100
-  .byte %00001000
+  .byte %00000100
   .byte %00000000
 
 ;$41 - mid left window
@@ -712,74 +720,130 @@ vt100_font:
   .byte %00011000
   .byte %00011000
 
-;$46 - right slant box
+;$46 - original: right slant box; now 'dot' (line drawing mode)
-  .byte %00000011
+;  .byte %00000011
-  .byte %00000111
+;  .byte %00000111
-  .byte %00001110
+;  .byte %00001110
+;  .byte %00011100
+;  .byte %00111000
+;  .byte %01110000
+;  .byte %11100000
+;  .byte %11000000
+  .byte %00000000
+  .byte %00000000
+  .byte %00000000
+  .byte %00011000
+  .byte %00011000
+  .byte %00000000
+  .byte %00000000
+  .byte %00000000
+
+;$47 - original: left slant box; now 'pound'  (line drawing mode)
+;  .byte %11000000
+;  .byte %11100000
+;  .byte %01110000
+;  .byte %00111000
+;  .byte %00011100
+;  .byte %00001110
+;  .byte %00000111
+;  .byte %00000011
   .byte %00011100
-  .byte %00111000
+  .byte %00110110
+  .byte %01100000
+  .byte %01111100
+  .byte %01100000
+  .byte %00110000
+  .byte %01111110
+  .byte %00000000
+
+;$48 - original: right slant solid; now 'FF' (line drawing mode)
+;  .byte %00000001
+;  .byte %00000011
+;  .byte %00000111
+;  .byte %00001111
+;  .byte %00011111
+;  .byte %00111111
+;  .byte %01111111
+;  .byte %11111111
+  .byte %00000000
   .byte %01110000
-  .byte %11100000
+  .byte %01000000
-  .byte %11000000
+  .byte %01101110
+  .byte %01001000
+  .byte %00001100
+  .byte %00001000
+  .byte %00000000
 
-;$47 - left slant box
+;$49 - original: low right solid; now 'CR' (line drawing mode)
-  .byte %11000000
+;  .byte %00000000
-  .byte %11100000
+;  .byte %00000000
+;  .byte %00000000
+;  .byte %00000000
+;  .byte %00001111
+;  .byte %00001111
+;  .byte %00001111
+;  .byte %00001111
+  .byte %00000000
   .byte %01110000
-  .byte %00111000
+  .byte %01000000
-  .byte %00011100
+  .byte %01001100
-  .byte %00001110
+  .byte %01111010
-  .byte %00000111
+  .byte %00001100
-  .byte %00000011
+  .byte %00001010
+  .byte %00000000
 
-;$48 - right slant solid
+;$4A - original: left slant solid;  now 'LF' (line drawing mode)
-  .byte %00000001
+;  .byte %10000000
-  .byte %00000011
+;  .byte %11000000
-  .byte %00000111
+;  .byte %11100000
-  .byte %00001111
+;  .byte %11110000
-  .byte %00011111
+;  .byte %11111000
-  .byte %00111111
+;  .byte %11111100
-  .byte %01111111
+;  .byte %11111110
+;  .byte %11111111
+  .byte %00000000
+  .byte %01000000
+  .byte %01000000
+  .byte %01001110
+  .byte %01111000
+  .byte %00001100
+  .byte %00001000
+  .byte %00000000
+
+;$4B - original: up right solid; now ° (line drawing mode)
+;  .byte %00001111
+;  .byte %00001111
+;  .byte %00001111
+;  .byte %00001111
+;  .byte %00000000
+;  .byte %00000000
+;  .byte %00000000
+;  .byte %00000000
+  .byte %00000000
+  .byte %00011000
+  .byte %01100110
+  .byte %01100110
+  .byte %00011000
+  .byte %00000000
+  .byte %00000000
+  .byte %00000000
+
+;$4C - original: up left solid; now upper line
+;  .byte %11110000
+;  .byte %11110000
+;  .byte %11110000
+;  .byte %11110000
+;  .byte %00000000
+;  .byte %00000000
+;  .byte %00000000
+;  .byte %00000000
+  .byte %00000000
   .byte %11111111
-
-;$49 - low right solid
-  .byte %00000000
-  .byte %00000000
-  .byte %00000000
-  .byte %00000000
-  .byte %00001111
-  .byte %00001111
-  .byte %00001111
-  .byte %00001111
-
-;$4A - left slant solid
-  .byte %10000000
-  .byte %11000000
-  .byte %11100000
-  .byte %11110000
-  .byte %11111000
-  .byte %11111100
-  .byte %11111110
   .byte %11111111
-
-;$4B - up right solid
-  .byte %00001111
-  .byte %00001111
-  .byte %00001111
-  .byte %00001111
   .byte %00000000
   .byte %00000000
   .byte %00000000
   .byte %00000000
-
-;$4C - up left solid
-  .byte %11110000
-  .byte %11110000
-  .byte %11110000
-  .byte %11110000
-  .byte %00000000
-  .byte %00000000
-  .byte %00000000
   .byte %00000000
 
 ;$4D - top box
@@ -802,24 +866,40 @@ vt100_font:
   .byte %11111111
   .byte %11111111
 
-;$4F - low left solid
+;$4F - original: low left solid; now lower line
+;  .byte %00000000
+;  .byte %00000000
+;  .byte %00000000
+;  .byte %00000000
+;  .byte %11110000
+;  .byte %11110000
+;  .byte %11110000
+;  .byte %11110000
   .byte %00000000
   .byte %00000000
   .byte %00000000
   .byte %00000000
-  .byte %11110000
+  .byte %00000000
-  .byte %11110000
+  .byte %11111111
-  .byte %11110000
+  .byte %11111111
-  .byte %11110000
+  .byte %00000000
 
-;$50 - club card
+;$50 - original: club card; now plus/minus (line drawing mode)
+;  .byte %00000000
+;  .byte %00011100
+;  .byte %00011100
+;  .byte %01110111
+;  .byte %01110111
+;  .byte %00001000
+;  .byte %00011100
+;  .byte %00000000
+  .byte %00000000
+  .byte %00011000
+  .byte %01111110
+  .byte %00011000
+  .byte %00000000
+  .byte %01111110
   .byte %00000000
-  .byte %00011100
-  .byte %00011100
-  .byte %01110111
-  .byte %01110111
-  .byte %00001000
-  .byte %00011100
   .byte %00000000
 
 ;$51 - up left window
@@ -852,25 +932,41 @@ vt100_font:
   .byte %00011000
   .byte %00011000
 
-;$54 - solid circle
+;$54 - original: solid circle; now 'NL' (line drawing mode)
+;  .byte %00000000
+;  .byte %00000000
+;  .byte %00111100
+;  .byte %01111110
+;  .byte %01111110
+;  .byte %01111110
+;  .byte %00111100
+;  .byte %00000000
   .byte %00000000
-  .byte %00000000
+  .byte %01001000
-  .byte %00111100
+  .byte %01101000
-  .byte %01111110
+  .byte %01011000
-  .byte %01111110
+  .byte %01001000
-  .byte %01111110
+  .byte %00001000
-  .byte %00111100
+  .byte %00001110
   .byte %00000000
 
-;$55 - bottom solid
+;$55 - original: bottom solid; now 'VT' (line drawing mode)
+;  .byte %00000000
+;  .byte %00000000
+;  .byte %00000000
+;  .byte %00000000
+;  .byte %11111111
+;  .byte %11111111
+;  .byte %11111111
+;  .byte %11111111
   .byte %00000000
+  .byte %01010000
+  .byte %01010000
+  .byte %01011110
+  .byte %00100100
+  .byte %00000100
+  .byte %00000100
   .byte %00000000
-  .byte %00000000
-  .byte %00000000
-  .byte %11111111
-  .byte %11111111
-  .byte %11111111
-  .byte %11111111
 
 ;$56 - left box
   .byte %11000000
@@ -902,15 +998,23 @@ vt100_font:
   .byte %00000000
   .byte %00000000
 
-;$59 - left solid
+;$59 - original: left solid; now '<=' (line drawing mode)
-  .byte %11110000
+;  .byte %11110000
-  .byte %11110000
+;  .byte %11110000
-  .byte %11110000
+;  .byte %11110000
-  .byte %11110000
+;  .byte %11110000
-  .byte %11110000
+;  .byte %11110000
-  .byte %11110000
+;  .byte %11110000
-  .byte %11110000
+;  .byte %11110000
-  .byte %11110000
+;  .byte %11110000
+  .byte %00000000
+  .byte %00001100
+  .byte %00011000
+  .byte %00110000
+  .byte %00011000
+  .byte %00001100
+  .byte %00111110
+  .byte %00000000
 
 ;$5A - low left window
   .byte %00011000
@@ -922,54 +1026,94 @@ vt100_font:
   .byte %00000000
   .byte %00000000
 
-;$5B - display escape
+;$5B - original: display escape; now diamond
-  .byte %01111000
+;  .byte %01111000
-  .byte %01100000
+;  .byte %01100000
-  .byte %01111000
+;  .byte %01111000
-  .byte %01100000
+;  .byte %01100000
-  .byte %01111110
+;  .byte %01111110
-  .byte %00011000
+;  .byte %00011000
-  .byte %00011110
+;  .byte %00011110
-  .byte %00000000
+;  .byte %00000000
-
-;$5C - up arrow
   .byte %00000000
   .byte %00011000
   .byte %00111100
   .byte %01111110
-  .byte %00011000
-  .byte %00011000
-  .byte %00011000
-  .byte %00000000
-
-;$5D - down arrow
-  .byte %00000000
-  .byte %00011000
-  .byte %00011000
-  .byte %00011000
   .byte %01111110
   .byte %00111100
   .byte %00011000
   .byte %00000000
 
-;$5E - left arrow
+;$5C - original: up arrow; now checkerboard
+;  .byte %00000000
+;  .byte %00011000
+;  .byte %00111100
+;  .byte %01111110
+;  .byte %00011000
+;  .byte %00011000
+;  .byte %00011000
+;  .byte %00000000
+  .byte %10101010
+  .byte %01010101
+  .byte %10101010
+  .byte %01010101
+  .byte %10101010
+  .byte %01010101
+  .byte %10101010
+  .byte %01010101
+
+;$5D - original: down arrow; now '>=' (line drawing mode)
+;  .byte %00000000
+;  .byte %00011000
+;  .byte %00011000
+;  .byte %00011000
+;  .byte %01111110
+;  .byte %00111100
+;  .byte %00011000
+;  .byte %00000000
   .byte %00000000
-  .byte %00011000
-  .byte %00110000
-  .byte %01111110
   .byte %00110000
   .byte %00011000
-  .byte %00000000
+  .byte %00001100
+  .byte %00011000
+  .byte %00110000
+  .byte %01111100
   .byte %00000000
 
-;$5F - right arrow
+;$5E - original: left arrow; now 'pi' (line drawing mode)
+;  .byte %00000000
+;  .byte %00011000
+;  .byte %00110000
+;  .byte %01111110
+;  .byte %00110000
+;  .byte %00011000
+;  .byte %00000000
+;  .byte %00000000
+  .byte %00000000
+  .byte %00000001
+  .byte %11111111
+  .byte %01100110
+  .byte %01100110
+  .byte %01100110
+  .byte %01100110
+  .byte %00000000
+
+;$5F - original: right arrow; now 'unequal' (line drawing mode)
+;  .byte %00000000
+;  .byte %00011000
+;  .byte %00001100
+;  .byte %01111110
+;  .byte %00001100
+;  .byte %00011000
+;  .byte %00000000
+;  .byte %00000000
   .byte %00000000
   .byte %00011000
-  .byte %00001100
   .byte %01111110
-  .byte %00001100
   .byte %00011000
-  .byte %00000000
+  .byte %00011000
+  .byte %01111110
+  .byte %00011000
   .byte %00000000
 
 ;$60 - original: diamond card; now `