VE: allow usage on screens narrower than 67 columns

Previously, display would be completely broken. We have yet to add
a way to display the "right" part of a buffer on such smaller
displays.

blk/126

@@ -2,6 +2,7 @@ CREATE CMD 2 C, '$' C, 0 C,
 CREATE PREVPOS 0 , CREATE PREVBLK 0 ,
 : MIN ( n n - n ) 2DUP > IF SWAP THEN DROP ;
 : MAX ( n n - n ) 2DUP < IF SWAP THEN DROP ;
+: large? COLS 67 > ; : col- 67 COLS MIN -^ ;
 : acc@ ACC @ 1 MAX ;
 : num ACC @ SWAP _pdacc IF ACC ! ELSE DROP THEN ;
 : nspcs ( n -- , spit n space ) 0 DO SPC LOOP ;
@@ -12,3 +13,4 @@ CREATE PREVPOS 0 , CREATE PREVBLK 0 ,
     SPC EDPOS @ 64 /MOD . ',' EMIT . SPC
     BLKDTY @ IF '*' EMIT THEN 10 nspcs ;
 : nums 17 1 DO 2 I + aty I . SPC SPC LOOP ;
+: mode! ( c -- ) 4 col- 0 AT-XY ;

blk/127

@@ -1,16 +1,16 @@
-: contents 16 0 DO 3 I 3 + AT-XY
-    64 I * BLK( + DUP 64 + SWAP DO
+: contents 16 0 DO large? IF 3 ELSE 0 THEN I 3 + AT-XY
+    64 I * BLK( + DUP 3 col- + SWAP DO
         I C@ 0x20 MAX EMIT LOOP LOOP
-    3 16 gutter ;
+    large? IF 3 16 gutter THEN ;
 : selblk BLK> @ PREVBLK ! BLK@ contents ;
-: mode! ( c -- ) 63 0 AT-XY ;
 : pos! ( newpos -- ) EDPOS @ PREVPOS !
     DUP 0< IF DROP 0 THEN 1023 MIN EDPOS ! ;
 : setpos ( -- ) EDPOS @ 64 /MOD
-    3 + ( header ) SWAP 3 + ( gutter ) SWAP AT-XY ;
+    3 + ( header ) SWAP large? IF 3 + ( gutter ) THEN
+    SWAP AT-XY ;
 : cmv ( n -- , char movement ) acc@ * EDPOS @ + pos! ;
 : buftype ( buf ln -- )
     3 OVER AT-XY KEY DUP EMIT
     DUP 0x20 < IF 2DROP DROP EXIT THEN
-    ( buf ln c ) 63 nspcs SWAP 4 SWAP AT-XY ( buf c ) SWAP C!+
-    IN( _zbuf (rdln) IN( SWAP 63 MOVE ;
+    ( buf ln c ) 4 col- nspcs SWAP 4 SWAP AT-XY ( buf c )
+    SWAP C!+ IN( _zbuf (rdln) IN( SWAP 63 MOVE ;

blk/131

@@ -4,10 +4,11 @@
     DUP CMD 2+ C! CMD FIND IF EXECUTE ELSE DROP THEN
     0 ACC ! UPPER 'Q' = ;
 : bufp ( buf -- )
-    DUP 64 + SWAP DO I C@ 0x20 MAX EMIT LOOP ;
+    DUP 3 col- + SWAP DO I C@ 0x20 MAX EMIT LOOP ;
 : bufs
     1 aty ." I: " IBUF bufp
-    2 aty ." F: " FBUF bufp 0 3 gutter ;
+    2 aty ." F: " FBUF bufp
+    large? IF 0 3 gutter THEN ;
 : VE
     clrscr 0 ACC ! 0 PREVPOS ! nums contents
     BEGIN status bufs setpos KEY handle UNTIL