On Wed, October 14, 2015 17:19, Marco van de Voort wrote: > In our previous episode, Tomas Hajny said: >> >> There's a lot of use in embedded targets: >> > >> > Ah, thank you. Finally an answer I can understand. :) >> >> The case of MS-DOS using it e.g. to provide direct access to the video >> adapter memory ($B800:0000), low-level information maintained by BIOS >> ($40:xxx), etc., as already mentioned by someone else (Marco?) is in >> principle the same as use cases relevant for embedded targets. > > Yes, but I thought it was square brackets, not parentheses. Address is > linearized using seg*16+ofs and addressed via %fs (for go32v2, for i8086 > it probably is used as is)
There are no parentheses nor brackets when used with "absolute": --------------- var Shifts1: byte absolute $40:$17; (* shift status as set by BIOS *) Shifts2: byte absolute $40:$18; (* (extended and normal) *) =============== Brackets are used when using the other option for direct memory access - accessing the memory as array via Mem[] / MemW[]. Tomas _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
