14 Sep 95 01:29, Carles Mateo escrib¡a a Jose Mejuto:
Hola Carles!
 >>  CM> I want to do a SHELL in a window just like :
 >>  CM> *********************************
 >>  CM> |                               |
 >>  CM> |       ================        |<-+-- SCREEN
 >>  CM> |       | SHELL WINDOW |        |
 >>  CM> |       ================        |
 >>  CM> |                               |
 >>  CM> *********************************
 >>  CM> I want to SHELL to another program without overwriting my
 >>  CM> screen.
 >> Ummmh! big trouble! If the 'shelled' program writes
 [...]
 >> the INT 29h 'DOS fast putchar' that is undocumented,
 >> and don't works in the same way in all DOS.
 CM> Well, program uses standard DOS services.
 CM> My prog shells to ARJ, RAR, ZIP, LZH, PKLITE and other
 CM> compressors/decompressors.
 This requires a ASM programming, you must intercept INT &H10, and redirect 
all calls to your INT &H10 handler, and perform a window adjust. To avoid 
direct screen writes, like RAR, you can change active video page, this must 
work in all video cards except MDA, but ... Anybody has an MDA ? :-)
 >> If you are going to use the routine in a machine with
 >> an VGA or EGA you can use a simple VGA trick, that
 >> skips the problem with direct screen writes. The
 >> effect is something like this:
 CM> This is a nice trick, but I want this program to run in all video
 CM> cards including Hercules.
 This technique may bring you a problem, the memory that you left for the 
compressor execution... You can't use an SWAP routine, this is probably more 
inportant that the fancy window ;-)
 CM> PD: See you in PROBAS_E..
 I hope that ;-)
Saludotes,
       ,,,   JOS (2:348/102)
      `0-0'  jmejuto@encomix.com
     /-(_)-\ mejuto@sfdzuma.usc.es
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