txt.waitkey() now returns the key that was pressed

compiler/res/prog8lib/atari/syslib.p8

@@ -8,6 +8,13 @@ atari {
         &uword  RESET_VEC       = $FFFC     ; 6502 reset vector, determined by the kernal if banked in
         &uword  IRQ_VEC         = $FFFE     ; 6502 interrupt vector, determined by the kernal if banked in
 
+        &uword COLCRS = 85
+        &ubyte ROWCRS = 84
+
+    romsub $F24A = getchar() -> ubyte @A
+    romsub $F2B0 = outchar(ubyte character @ A)
+    romsub $F2FD = waitkey() -> ubyte @A
+
 }
 
 sys {

compiler/res/prog8lib/atari/textio.p8

@@ -25,24 +25,22 @@ sub spc() {
     txt.chrout(' ')
 }
 
-const uword COLCRS = 85
-const uword ROWCRS = 84
 sub column(ubyte col) {
     ; ---- set the cursor on the given column (starting with 0) on the current line
-    pokew(COLCRS, col as uword)
+    atari.COLCRS = col
 }
 
 sub get_column() -> ubyte {
-    return peekw(COLCRS) as ubyte
+    return atari.COLCRS as ubyte
 }
 
 sub row(ubyte rownum) {
     ; ---- set the cursor on the given row (starting with 0) on the current line
-    @(ROWCRS) = rownum
+    atari.ROWCRS = rownum
 }
 
 sub get_row() -> ubyte {
-    return @(ROWCRS)
+    return atari.ROWCRS
 }
 
 asmsub  fill_screen (ubyte character @ A, ubyte color @ Y) clobbers(A)  {
@@ -127,9 +125,6 @@ asmsub  scroll_down  (bool alsocolors @ Pc) clobbers(A)  {
 }
 
 
-romsub $F2B0 = outchar(ubyte character @ A)
-romsub $F2Fd = waitkey()
-
 asmsub chrout(ubyte character @ A) {
 	%asm {{
 		sta  _tmp_outchar+1
@@ -139,7 +134,7 @@ asmsub chrout(ubyte character @ A) {
 		pha
 _tmp_outchar
 		lda  #0
-		jsr  outchar
+		jsr  atari.outchar
 		pla
 		tay
 		pla
@@ -395,6 +390,12 @@ sub get_cursor(uword colptr, uword rowptr) {
     @(rowptr) = get_row()
 }
 
+asmsub waitkey() -> ubyte @A {
+    %asm {{
+        jmp  atari.waitkey
+    }}
+}
+
 asmsub width() clobbers(X,Y) -> ubyte @A {
     ; -- returns the text screen width (number of columns)
     ; TODO

compiler/res/prog8lib/c128/textio.p8

@@ -626,7 +626,7 @@ asmsub height() clobbers(X, Y) -> ubyte @A {
     }}
 }
 
-asmsub waitkey() {
+asmsub waitkey() -> ubyte @A {
     %asm {{
 -       jsr cbm.GETIN
         beq -

compiler/res/prog8lib/c64/textio.p8

@@ -625,7 +625,7 @@ asmsub height() clobbers(X, Y) -> ubyte @A {
     }}
 }
 
-asmsub waitkey() {
+asmsub waitkey() -> ubyte @A {
     %asm {{
 -       jsr cbm.GETIN
         beq -

compiler/res/prog8lib/cx16/textio.p8

@@ -796,7 +796,7 @@ asmsub height() clobbers(X, Y) -> ubyte @A {
     }}
 }
 
-asmsub waitkey() {
+asmsub waitkey() -> ubyte @A {
     %asm {{
 -       jsr cbm.GETIN
         beq -

compiler/res/prog8lib/pet32/textio.p8

@@ -495,7 +495,7 @@ asmsub height() clobbers(X, Y) -> ubyte @A {
     }}
 }
 
-asmsub waitkey() {
+asmsub waitkey() -> ubyte @A {
     %asm {{
 -       jsr cbm.GETIN
         beq -

docs/source/todo.rst

@@ -2,8 +2,6 @@
 TODO
 ====
 
-- txt.waitkey() should return the pressed key? Also on atari.
-
 - [on branch: shortcircuit] investigate McCarthy evaluation again? this may also reduce code size perhaps for things like if a>4 or a<2 ....
 
 ...

examples/atari/hello.p8

@@ -1,6 +1,5 @@
 %import textio
 %zeropage basicsafe
-%address $2000
 
 ; hello world test for Atari 8-bit
 
@@ -8,6 +7,6 @@ main {
     sub start() {
         txt.print("Hello, World!")
         txt.nl()
-        txt.waitkey()
+        void txt.waitkey()
     }
 }