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Re: Xorg FYI

The datasheet for the Vison864 is here: http://www.vgamuseum.info/index.php/component/k2/item/351-s3-vision864 On page 1-1 there's a table that shows the different resolutions supported by the chip. The E15 has 2MB, so it looks like it could support all those resolutions, but that is currently not the case in actual use. The specs for the E15 are described under the header "IBM E15-type" on this page:
I'm not sure if the limiting factor is hardware or software, since this is beyond my knowledge/skill level.

As for that kernel option, it is probably missing because the dev, that did much of the work for this port, had no desire to use onboard video. It's mentioned on the port page that he only used RS-232 with these machines. This is also likely why the install CD-ROM uses the boot_com0 boot loader. I have to build my own ISO with custom kernels, so it's not that big of a deal for me, but if the majority of folks still using these machines want to use X, then yeah, it might make sense to add it.


On 10/30/19 3:56 PM, David Brownlee wrote:
On Sat, 26 Oct 2019 at 22:17, T <bobs%thelibertytree.org@localhost> wrote:
Hi all,
just an FYI about running Xorg, you'll need to use a custom kernel
config because the standard ones lack the following line, which is
required to run X:

options         INSECURE        # needed for X to work
Quite a few ports default to "options INSECURE" enabled in GENERIC -
might it make sense to switch port-prep across?

I was able to get the integrated IBM E15 display adapter working in
8-bit mode, 16-bit and 24-bit modes did start, but had weird color
issues and small resolutions. Those modes are functionally unusable. The
datasheet for the S3 Vision864 chip claims to support better color and
resolutions, but the E15 implementation does not look to work with them
and the IBM documentation only states support for the 8-bit resolutions.
1024x768 8-bit seems to work okay, which is the max resolution mentioned
in the IBM documentation.
Maybe there is some additional chipset setup needed for those modes
which the system ROM just omits? You might want to ask macallan@ if
he's seen anything similar (I'm sure he won't mind me touting him on
this :-p) as he has a fair amount of experience in getting oddball
display chipsets running.


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