51  IF BYTE(LOOK) > 127 THEN BYTE(LOO
        K) = BYTE(LOOK) - 128
     52  IF BYTE(LOOK) < 32 THEN BYTE(LOOK
        ) = BVTE(LOOK) + 64: GOTO 55
     53  IF BYTE(LOOK) < 97 THEN BVTE(LOOK
        ) = BYTE(LOOK) - 32
     55  NEXT LOOK
     59  FOR EXTRA = 0 TO 7
     60  FOR LOOK = 1 TO LEN(A$)
     70  WANT(LOOK) = PEEK(CHBASE + EXTRA
        + BYTE(LOOK)*8)
     80  POKE TV + EXTRA, WANT(LOOK): TV =
         TV + 1
     82  NEXT LOOK
     85  SCREEN = SCREEN + 39: TV = SCREEN
     90  NEXT EXTRA
     100  SCREEN = REAL + TIME*320
     110  IF SCREEN > REAL + 6080 THEN TIM
         E = 0: GOTO 100
     120  GOTO 30

     This program simply takes the bytes which represent the letters
     you input as A$ and finds their places in the ROM character set.
     It then proceeds to POKE the bytes into the screen RAM, using a
     FOR-NEXT loop.

     To convert ATASCII codes to the internal codes, use this table:

     ATASCII value   Operation for
                     internal code
     0   --  31      add      64
     32  --  95      subtract 32
     96  -- 127      remains the same
     128 -- 159      add      64
     160 -- 223      subtract 32
     224 -- 255      remains the same

     See COMPUTE!, November 1981, for the program "TextPlot"
     which displays text in different sizes in GRAPHICS modes three
     to eight, and January 1982 for a program to edit character sets,
     "SuperFont."

---------------------------------------------------------------------------

Locations 58368 to 58447 ($E400 to $E44F) are the vector tables, stored
as LSB, MSB. These base addresses are used by resident handlers.
Handler vectors use the following format:

OPEN vector
CLOSE vector