jkg@gitpyr.UUCP (03/13/87)
In article <936@aicchi.UUCP> klotz@aicchi.UUCP (Klotzbach) writes: >Pc-Paint uses the IBM BASIC BLOAD format. That is, it contains a 2-integer >address, 1 Integer size and 16K bytes of color information as described for Since I recently went through all kinds of machinations to determine the format of a BLOAD file, I thought I'd post this for the benefit of all. A BSAVEd file has a header which contains information allowing BASIC to load the file at an absolute address in memory. The address is given by the standard segment:offset notation of the 80x86. The BLOAD format consists of a 7 byte header, followed by some data. The format of the header is as follows: byte 1: an ID byte - an example in one of the IBM manuals (don't remember which) uses FD hex for the ID. I don't know what is magic about this number, but it worked OK for me. bytes 2 and 3: the segment of the absolute address to load the file (byte 2 is LSByte, byte 3 is MSByte). bytes 4 and 5: the offset of the absolute address to load the file (byte 4 is LSByte, byte 5 is MSByte). bytes 6 and 7: the length of the data which follows (byte 6 is LSByte, byte 7 is MSByte). This is the length of the file less the header size (7 bytes). Hope you folks find this information useful. Jim Greenlee -- The Shadow...!{akgua,allegra,amd,hplabs,ihnp4,seismo,ut-ngp}!gatech!gitpyr!jkg Jryy, abj lbh'ir tbar naq qbar vg! Whfg unq gb xrrc svqqyvat jvgu vg hagvy lbh oebxr vg, qvqa'g lbh?!