╞OR THOSE WHO ARE IN POSSESSION OF CONVERTED ╨├╪ GRAPHICS AND HAVE BEEN PREVENTED FROM USING THEM FOR PURPOSES OTHER THAN PRINTER DUMPS, THE GOOD NEWS IS THAT A FIX CAN BE EFFECTED QUITE SIMPLY WITH A TRACK AND SECTOR EDITOR.
╞IRST MAKE A COPY OF THE DISK CONCERNED SO THAT ANY EXPERIMENTING THAT COMES TO GRIEF WON'T LEAVE YOU WITHOUT THE ORIGINAL. ╞IND THE NAME OF THE FILE YOU WANT TO FIX WHEREVER IT MAY BE ON TRACK 18 OF THE DISK AND THEN TAKE NOTE OF THE TWO BYTES WHICH APPEAR IN THE HEXADECIMAL POSITIONS $03/$04 IMMEDIATELY BEFORE THE FILE NAME, IF IT IS THE FIRST ONE IN THAT SECTOR. ╞OR THE SECOND FILE THE BYTES ARE AT POSITIONS $23/24, THE THIRD ARE AT $43/44 AND SO ON AT $63/64, $83/84, $┴3/┴4, $├3/├4 OR $┼3/┼4.
╘HESE TWO BYTES ARE THE NUMBERS, PROBABLY IN HEXADECIMAL, OF THE TRACK AND SECTOR OF WHAT ╟┼╧╙ CALLS THE ╔╬─┼╪ ╘┴┬╠┼ FOR THAT PARTICULAR FILE AND IT IS IN THIS TABLE WHERE THE ERROR HAS OCCURRED.
╫HEN CONSULTING THE ╔╬─┼╪ ╘┴┬╠┼ YOU WILL SEE SOMETHING LIKE THIS (IT USUALLY IS IN HEXADECIMAL AND THE PICTURE DATA FOR EACH FILE WILL PROBABLY END AT DIFFERING SETS OF BYTES):
00: 00 ╞╞ 11 01 11 02 11 07
08: 10 01 10 05 10 08 10 0┴
10: 10 0┼ 09 00 00 00 00 00
╔T IS THOSE TWO FINAL SETS OF ┌┼╥╧'S WHERE THE PROBLEM STARTS. ╘HE ACTUAL PICTURE DATA IN THIS EXAMPLE ENDS AT BYTE $13 WITH $09 00 AND FROM THERE ON UP TO AND INCLUDING BYTE $5┬ ╟┼╧╙ REQUIRES A PADDING OF $00 $╞╞ SO LINE $10 SHOULD BE ALTERED TO READ:
10: 10 0┼ 09 00 00 ╞╞ 00 ╞╞
18: 00 ╞╞ 00 ╞╞ 00 ╞╞ 00 ╞╞
ALL THE WAY TO BYTE $5┬. ╘HE REST OF THE SECTOR SHOULD BE LEFT AS ZEROS.
╘WO THINGS TO WATCH ARE THAT YOU DON'T ACCIDENTLY SUPPOSE THAT THE ZERO AT BYTE $13 (19) ABOVE IS PART OF THE ERROR. ╘HAT PAIR OF BYTES RELATES TO FURTHER FILES AT TRACK NINE ╙┼├╘╧╥ ┌┼╥╧. ╘HE PROBLEM STARTS FROM THE BYTE AT $14 (20). ┴LSO, ALL THE SUBSEQUENT $╞╞'S MUST BE ON THE ODD NUMBERED BYTES OR THE DRIVE WILL ATTEMPT TO FIND A TRACK NUMBERED 255. ╚APPY EDITING!
