Previous Thread
Next Thread
Print Thread
Page 9 of 15 1 2 7 8 9 10 11 14 15
Re: Siemens PC-D [Re: rfka01] #101008 08/06/15 02:24 AM
Joined: Jan 2012
Posts: 800
C
crazyc Offline
Senior Member
Offline
Senior Member
C
Joined: Jan 2012
Posts: 800
So I get this written to a port:
Code:
SIEMENS 80186 SINIX

COPYRIGHT (c) 1984 BY SIEMENS AG

Size of free memory = 830 Kbyte

Computername: sie001, Version: 1.2, Release: 25.Feb.1987


Unfortunately it's the wrong port and worse it's the video controller config port. At least it's booting.

Re: Siemens PC-D [Re: rfka01] #101016 08/06/15 08:27 PM
Joined: Jan 2012
Posts: 999
rfka01 Offline OP
Senior Member
OP Offline
Senior Member
Joined: Jan 2012
Posts: 999
Wow! Great progress, thanks!


NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20
Re: Siemens PC-D [Re: rfka01] #101017 08/06/15 08:30 PM
Joined: Mar 2001
Posts: 16,274
R
R. Belmont Online Content
Very Senior Member
Online Content
Very Senior Member
R
Joined: Mar 2001
Posts: 16,274
Maybe the MMU remaps the I/O space in addition to memory?

Re: Siemens PC-D [Re: rfka01] #101224 08/20/15 02:28 AM
Joined: Jan 2012
Posts: 800
C
crazyc Offline
Senior Member
Offline
Senior Member
C
Joined: Jan 2012
Posts: 800

So this is the best I can do for now. It's not remapping because it starts in the bootloader before the MMU is even enabled. My only guess is that the graphics board on the PC-X is different from the one in the PC-D. If you look at the pictures that rfka01 posted of the PC-X the graphics board has an 8031 which the PC-D has an 8047. It also has an extra ROM chip. Maybe the 8031 presents a terminal like interface and can write directly to the VRAM and the extra ROM is a character ROM instead of RAM (the tech manual says this is an option).

Re: Siemens PC-D [Re: rfka01] #101225 08/20/15 06:32 AM
Joined: Jan 2012
Posts: 999
rfka01 Offline OP
Senior Member
OP Offline
Senior Member
Joined: Jan 2012
Posts: 999
It's alive smile ... that's the main thing! Once again, thanks ... chances are good I'll get BIOS files from a real PC-X some time during autumn, I am sure your work now is a great basis for that.


NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20
Re: Siemens PC-D [Re: rfka01] #101230 08/20/15 07:50 PM
Joined: Jan 2012
Posts: 800
C
crazyc Offline
Senior Member
Offline
Senior Member
C
Joined: Jan 2012
Posts: 800
I'd be surprised if the BIOS ROMs are different as the PC-D ones have the MMU tests. The graphics ROMs are the ones of real interest for me.

Re: Siemens PC-D [Re: rfka01] #101361 08/29/15 10:27 PM
Joined: Jan 2012
Posts: 999
rfka01 Offline OP
Senior Member
OP Offline
Senior Member
Joined: Jan 2012
Posts: 999
Axel, who I've been in contact with about the PC-X, documented the disassembly of his machine and put the ROMs online:

http://www.geekdot.com/siemens-pc-x/

Thanks to another contributor!


NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20
Re: Siemens PC-D [Re: rfka01] #101362 08/29/15 10:36 PM
Joined: Mar 2001
Posts: 16,274
R
R. Belmont Online Content
Very Senior Member
Online Content
Very Senior Member
R
Joined: Mar 2001
Posts: 16,274
Awesome!

Re: Siemens PC-D [Re: rfka01] #101533 09/09/15 01:47 PM
Joined: Jan 2012
Posts: 800
C
crazyc Offline
Senior Member
Offline
Senior Member
C
Joined: Jan 2012
Posts: 800
Got it.

Need to figure out how the attributes select the line drawing characters.

Edit:

Last edited by crazyc; 09/09/15 05:26 PM.
Re: Siemens PC-D [Re: rfka01] #101535 09/09/15 02:17 PM
Joined: Mar 2001
Posts: 16,274
R
R. Belmont Online Content
Very Senior Member
Online Content
Very Senior Member
R
Joined: Mar 2001
Posts: 16,274
Ooh, nice smile

Page 9 of 15 1 2 7 8 9 10 11 14 15

Who's Online Now
2 registered members (Golden Child, 1 invisible), 162 guests, and 3 spiders.
Key: Admin, Global Mod, Mod
ShoutChat Box
Comment Guidelines: Do post respectful and insightful comments. Don't flame, hate, spam.
Forum Statistics
Forums9
Topics8,673
Posts113,796
Members4,852
Most Online418
Aug 14th, 2019
Powered by UBB.threads™ PHP Forum Software 7.7.3