Date: Thu, 4 Aug 94 16:10:12 EST
From: acmq AT alpha DOT coe DOT ufrj DOT br (Antonio Carlos Moreirao de Queiroz)
To: djgpp AT sun DOT soe DOT clarkson DOT edu
Subject: Default graphics modes and drivers

Hi,

I noticed that it is not necessary to set the GO32 environment variable to
use GRX graphics in standard VGA mode 640x480, 16 colors.
Other modes can also be selected simply setting GO32=gw <width>, also without
specifying the driver.
What are the specifications of this default driver?
With some combinations of graphics boards and mouses, the screen colors get
garbled when the mouse driver is initialized (using a mousex call), but return
to the normal when the program starts drawing again (using bgi calls and the
bcc2grx package). The colors were allocated before the mouse initialization.
This strange behavior only happens when the GO32 variable is not set, or set
to ... nc 16. With GO32=...nc 256 everything works correctly.
Has someone experienced similar problems? Some idea about what is happening?

Thanks,

Antonio Carlos M. de Queiroz