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Re: Siemens PC-D [Re: rfka01] #101660 09/20/15 08:37 AM
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rfka01 Offline OP
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The emulation works very well! I was able to (almost) restore two harddisk backups ... it would be great to have ALT and CTRL keys ... and the mouse smile ... but at least on the PC-D that requires more 8041 gymnastics IIRC smile

Things like NC and XTPRO are kind of hard to use because of a missing cursor highlight:



vs.



and



vs.



The clock does funny things too smile


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Re: Siemens PC-D [Re: rfka01] #101666 09/20/15 01:37 PM
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Originally Posted By rfka01

The clock does funny things too smile


This is a little weird as it's inited in BCD mode (by MESS) but read in binary mode. A flag might have to be added to the RTC emulation that tells it to init the clock as binary.

Re: Siemens PC-D [Re: rfka01] #101670 09/20/15 10:21 PM
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rfka01 Offline OP
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The changes are great, now NC is fully usable.

What's strange is that for GEM the contrasts seem to be inverted in the emulation, cf. this (admittedly shitty) video of the PC-D, starting GEM and switching between positive and negative video modes.

https://dl.dropboxusercontent.com/u/55419307/Siemens%20PC-D/pc-d_gem.mp4

I've tried to assign the "up left" key in the middle of the directions pad to HOME/POS1 (in GEM it confirms the selection of a menu item, in Word it moves the cursor back to the start of the text (not the line)), but the key does not perform the intended action in the emulation.


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Re: Siemens PC-D [Re: rfka01] #101671 09/21/15 01:05 AM
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Keys are fixed. The video is 404'd but presumably the inversion is the same as the text mode and controlled by the 8741.

Re: Siemens PC-D [Re: rfka01] #101753 09/26/15 07:51 PM
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Here are two harddisk images of my machines, one focuses primarily on GEM, the other one on Windows (2.1). The Windows machine is also one of my biggest emulation/preservation blunders ... I backed up my uncle's PC-D (which has been scrapped in the meantime *aargh*), but didn't create a boot disk.
So for the moment, the disk image boots DOS 3.1. I still hope that some unlabeled floppy in my basement boots DOS 3.2 on the PC-D ...

https://dl.dropboxusercontent.com/u/55419307/Siemens%20PC-D/b6188-pcd-gem.rar

https://dl.dropboxusercontent.com/u/55419307/Siemens%20PC-D/b6188-pcd-gem.rar


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Re: Siemens PC-D [Re: rfka01] #101755 09/26/15 11:02 PM
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crazyc Offline
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Both links are the same.

Re: Siemens PC-D [Re: rfka01] #101757 09/27/15 06:35 AM
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rfka01 Offline OP
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Thanks for the info, my dropbox is acting up at the moment.

https://dl.dropboxusercontent.com/u/55419307/Siemens%20PC-D/mi522-pcd-win.rar


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Re: Siemens PC-D [Re: rfka01] #101930 10/07/15 08:52 PM
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@crazyc, the level of accuracy you're reaching is truly amazing - thank you!!!

On the real PC-D represented by the "b6188-pcd-gem" harddisk image, there is a copy of Turbo Pascal 3.0 and a PC-D graphics library.

The PC-D tries to load Turbo Pascal, but then throws an NMI:



This is its normal behaviour for programs that are expecting features from a "real" IBM PC. Confirm with "J" twice, and the PC-D loads Turbo. If you press "N" it will reboot.



There is something weird going on on the real PC-D as well, as I cannot edit a file - the text is hidden behind a grey screen, but I can move the cursor around.
"w" loads the work file - in this case a graphics demo from the graphics library in c:\tp_pcd\circle.dem
"r" compiles and runs the demo, but not before ...



another nmi warns us (twice) that something is not quite right



Success!

The emulated PC-D simply dies when you load turbo.com, regardless of the screen configuration in tinst.com (which runs fine).


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Re: Siemens PC-D [Re: rfka01] #101933 10/07/15 10:05 PM
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Well, here you go. No idea why it's only drawing on half the screen though.

Re: Siemens PC-D [Re: rfka01] #101951 10/08/15 07:08 PM
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rfka01 Offline OP
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Pac must have eaten half of your screen then smile

When even the errors get emulated correctly, the emulation must be great!


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