[comp.sys.ibm.pc] accesing Hercules graphics card in C

nelson_p@apollo.uucp (04/01/88)

>> Can anyone tell me how to do Hercules compatible graphics from 
>> Quickc?  Any pointers to references would be helpful too.
>> The stock quickc graphics settings don't seem to work on my 
>> monochrome hardware.
>> 
>
>I have used three solutions to this problem.  The first two worked, the
>last one has not.
>
>	1.   QuickBasic 4.0 DOES support Hercules and I have written
>	     routines using it and then tying those routines into
>	     QuickC.
>
>        2.   I wrote my own assembly language routines for accessing
>	     the Hercules board and tied those into my QuickC.

  I'm interested in number 2.  Where can I get a sufficiently detailed
  description of the Hercules interface to do the same?   I bought a 
  Leading Edge model 'D' ,which uses a herc-cloned mono interface but
  comes with no technical info about it.  

  Do you read and write to the hardware directly or does the Phoenix
  BIOS support a herc interface?  The regular IBM BIOS does not.
                                                          
  Thank you in advance. 

                                            --Peter Nelson