-- card: 13315 from stack: in
-- bmap block id: 14314
-- flags: 0000
-- background id: 12278
-- name: peekbyte


-- part 46 (field)
-- low flags: 81
-- high flags: 2004
-- rect: left=26 top=50 right=258 bottom=403
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 0
-- font id: 3
-- text size: 10
-- style flags: 0
-- line height: 13
-- part name: 
----- HyperTalk script -----
on mouseUp
  hide card field 1
end mouseUp


-- part 49 (button)
-- low flags: 00
-- high flags: A003
-- rect: left=362 top=55 right=78 bottom=417
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 1
-- font id: 0
-- text size: 12
-- style flags: 0
-- line height: 16
-- part name: Demo
----- HyperTalk script -----
on mouseUp
  put empty into field "data"
  ask "Peek At " with "411000"

  if it is empty then exit mouseup
  show  field "data"
  put it into address
  put address into field "data"
  repeat with i=1 to 10
    put space & Space & peekbyte(address,L) after field "data"
    put last word of field "data" into address
  end repeat
  put return & return & "Click Mouse to Exit Demo" after field "data"
  wait until the mouseclick
  hide  field "data"
end mouseUp



-- part contents for card part 46
----- text -----
Ask your dealer for the name of a Macintosh user group near you.  If you live in the United States, you can call (800) 538-9696 for the name, address, and phone number of up to three Macintosh user groups in your geographical area.

Outside the United States, ask your dealer to get in touch with:

The Boston Computer Society               Berkeley Macintosh User Group
One Center Plaza                                   1442-A Walnut Street #62
Boston, MA 02108                                Berkeley, CA 94709
(617) 367-8080                                (415) 849-9114

Either of these organizations can provide you with the name of a Macintosh user group near you.  You can also join either of these groups or ask them for information on starting your own Macintosh user group.




-- part contents for background part 68
----- text -----
Peekbyte returns the unsigned byte stored at a given address. This value is represented in hexadecimal, but you may use the HexToDec XFCN provided in this stack to convert the value to a decimal if you wish.

A typical useage of peekbyte would be:

                    put peekbyte("411000") into temp

On the Mac Plus, this would put the value 4C into the variable temp.

As an option, you may include a second parameter with the peekbyte XFCN. If peekbyte detects a second parameter, it returns a 2-line result that consists of the byte stored at the given address in the first line and the next viable address (the original address + 1) in the second line. This option provides a simple and effective way to use peekbyte in a script to peek into a range of addresses. 

See the script of the demo button on this card for an example.  

The address provided to peekbyte may be even or odd.

-- part contents for background part 69
----- text -----
411000  4C
411001  DF
411002  00
411003  07
411004  55
411005  4F
411006  2F
411007  00
411008  2F
411009  01
41100A

Click Mouse to Exit Demo