Hello everyone!

I'd like to ask someone who knows about base address of mapped ISA memory in Pegasos-II.
I am working on BootX MacOS X bootloader and i need to switch the video display to graphical mode. 256 colours is the minimum but 320x200 will be enough for early debugging console so i will use legacy VGA mode since this will work on all video cards.
In the firmware the card is placed in 80x25 16cols text mode. Now i need to access ISA I/O ports (i know the base, it's 0xF8000000) and ISA-mapped framebuffer (i've tried to access the video memory using address obtained from PCI config but it's problematic and card-specific).
I've tried to look at u-boot source code and see how it's done in AmigaOne. There is a line there:

#define VIDEO_BASE (unsigned char *)0xFD0B8000

This means that ISA memory base in A1 is 0xFD000000. I've tried the same but it doesn't work, looks like Marvell host bridge uses another address. What address is it?

It's a pity that the information is so top-secret. Okay, let's improve this. 0xF9000000 is the base address of ISA memory, i've found it using trial and error method.
So the text mode video buffer is placed at 0xF90B8000.

Do you have access to the Open Firmware client interface from your loader?

We can provide you with a (non-spec!) linear framebuffer pretty easily..

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Matt Sealey

Of course i have an access to the client interface. But AFAIK v1.2 doesn't support graphics modes at all. I know about v1.3, but... Where is it?
Or may be i don't know something?

Sonic
1.2 OF supports graphics, i've seen it myself.

magnetic

bplan had a Freescale splash boot logo working.. also with tones!

Well, it's good. But - how?

Sonic

Its all FORTH programming. Check out a manual on FORTH and try some things out!



magnetic

Matt posted this the other day to the NetBSD mailing list:
This information helped push the NetBSD port a bit farther. If you want to follow the discussion try one of these threads: port-ofppc@NetBSD.org, port-powerpc@NetBSD.org, netbsd-ports@NetBSD.org

R&B

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http://bbrv.blogspot.com

Take a look at http://mail-index.netbsd.org/ if you want to browse these lists. Even if it's not my favorite FreeBSD, I got really excited

CzP

2 bbrv: well, may be i use wrong term, it just was called "ISA memory" in other projects, like u-boot. I meant a portion of space which emulates real-mode PC memory map. In this region text mode framebuffer, video BIOS image, etc are located. I know that ISA bus in Pegasos is in fact emulated, it exists only inside the southbridge.
2 Magnetic: FORTH is not BASIC, there are no things like "SCREENMODE 2" in it.
2 Neko: Well, where's the answer?
2 others: i won't browse BSD mailing lists since i already have all needed information. In fact my direct HW controlling routines are already written, they just need testing. Of course using OF would be more system friendly, but until Neko says something clear i will use current approach.

This DOES NOT EXIST.
It isn't emulated, it is a set of mapped PCI devices
Mail me privately. Just for your personal debugging purposes, it does not need to be public information.

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Matt Sealey

Ok, what's the email?

Just look at the e-mail icon in Neko's post
CzP

Already done