🚀 go-pugleaf

checker@acf5.NYU.EDU (checker) writes:

>I'm trying to get some Vio code working without any manuals (it was so
>nice of IBM to include no documentation on the freaking API in the
>WorkSet) and I'm having some trouble with direct video writes.

Agree totally!!

>I'm creating a VIOMODEINFO struct (and filling in the cb member with the
>size) and passing it to VioGetMode.  The buf_addr member has the correct
>address after the call for the mode I'm in (0x000B8000) but I get a GP
>fault when I try to write to it.  Do I have to do something before I can
>do a direct video write?  Can I even _do_ a direct video write?  If not,
>what is that pointer for?

This is an extract from one module from the PDCurses 2.0 package:

VIOMODEINFO modeInfo;

modeInfo.cb = sizeof(modeInfo);
VioGetMode(&modeInfo,0);
...

This works fine.

>Is there any example code around that shows how to do direct text mode
>(graphics modes would be a bonus) video memory writes using Vio?

You could get hold of the complete source of PDCurses 2.0 from:

accord.dciem.dnd.ca in /pub/curses/pdcurses

Only accessible 6pm to 6am Eastern(?) time.

>Chris

Cheers, Mark
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Mark Hessling                         Email: mark@snark.itc.gu.edu.au
DBA,ITS                               Phone: +617 875 7691
Griffith University                   Fax:   +617 875 7877
Nathan, Brisbane QLD 4111 Australia   *** PDCurses Maintainer ***
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