Re: Saving Double-hires screens

[mfischer@blue.weeg.uiowa.edu (Matthew Fischer)]

In article <3tq92g$725@acme.freenet.columbus.oh.us>,
Dave Althoff <dalloff@freenet.columbus.oh.us> wrote:
>58black@cua.edu wrote:
>:   Does anyone know how to save a double-hires graphic screen using the
>: BSAVE command??
>
>---TO SAVE A DOUBLE HI-RES IMAGE---
>]BSAVE IMAGE.MAIN,A$2000,L$1FFB
>]POKE -16299,0:REM *READ* from auxiliary memory
>]BSAVE IMAGE.AUX,A$2000,L$1FFB

There is a file format defined by Apple for double hi-res graphics. 
ftp://ftp.apple.com/dts/aii/ftn/ftn-08-0000 for details. Basically it is 
$2000 bytes of main memory image followed immediately by $2000 of aux 
memory image, and there is a mode byte stuffed into the file at +$78 
(+120). Files in this format should be given type $08 and auxtype $0000.


Matthew