Full Name: Apple II Graphics File
Short Name: Graphics File

Revised by Matt Deatherage (1989)
Written by Matt Deatherage (1988)

Files of this type and auxiliary type contain standard Apple II graphics files.

Changes since November 1988: The offset was incorrectly listed as +121 instead of +120. The hexadecimal value of $78 is correct.

Files of type $08 and any auxiliary type less than or equal to $3FFF contain a standard Apple II graphics file in one of several modes. After determining that the auxiliary type is not $4000 or $4001 (which have been defined for high-resolution and double high-resolution pictures packed with the Apple IIGS PackBytes routine), you can determine the mode of the file by examining byte +120 (+$78). The value of this byte, which ranges from zero to seven, is interpreted as follows:

               Mode                         Page 1    Page 2
               280 x 192 Black & White        0         4
               280 x 192 Limited Color        1         5
               560 x 192 Black & White        2         6
               140 x 192 Full Color           3         7

Note that some modes only apply to high-resolution while some only apply to double high-resolution.

The format of the file is as follows:

Bytes +000 to +8191

High-resolution image or portion of double high-resolution image stored in auxiliary memory.

Bytes +8192 to +16383

Portion of double high-resolution image stored in main memory (not present for high-resolution).

File type $08 was originally defined as an Apple /// FotoFile, but now it is useful for those applications that wish to save high-resolution or double high-resolution data with a file type other than $06, which is a standard binary file. If you choose to use this type, you should remember that older applications which do not check the auxiliary type may attempt to interpret these files incorrectly.