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#111418 - 11/28/17 08:05 PM Re: PC/XT/AT (inside) WIP topic [Re: Kale]  
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Alegend45 Offline
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Hey, I found the pcipc.cpp driver recently, and I think we should shift development resources from the other PC types over to it, because currently, we have NO working PCI machines that can use a VGA graphics card.

#111419 - 11/28/17 08:46 PM Re: PC/XT/AT (inside) WIP topic [Re: Alegend45]  
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Just Desserts Offline
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Meanwhile, you do not determine where "we" shift our development resources, only yours. If you're that passionate about it, nobody's going to reject a valid pull request.

#111420 - 11/28/17 09:58 PM Re: PC/XT/AT (inside) WIP topic [Re: Kale]  
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Alegend45 Offline
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That is true, but I'm not sure how to get IDE working for this driver.

#111427 - 11/29/17 06:08 AM Re: PC/XT/AT (inside) WIP topic [Re: Tinu]  
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Justin Offline
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Originally Posted by Tinu

Also, I know that a Swiss variant of PC DOS 1.1 was produced, which had a file "keybsg.com" on the diskette. There must also be one with a "keybgr.com", I guess. I could not find either one, only the US version seems to have survived to this day. Or does anyone have an image of Swiss or German DOS 1.1?


So apparently the way this worked with DOS 1.1 is that there was a master diskette with support for multiple countries, which you would then use to create a country-specific disk. See the instructions here.

I dug around a bit and found a copy of such a disk in Teledisk format and added it to the softlist, unfortunately I can't seem to get it to work in MAME:

[Linked Image] [Linked Image]

Not sure whether it's a bad dump or an emulation issue.

Also, the disk only has keybuk.com, keybit.com, keybsp.com, keybfr.com, and keybgr.com so there may yet be a Swiss German one out there somewhere.

#111429 - 11/29/17 07:51 AM Re: PC/XT/AT (inside) WIP topic [Re: Alegend45]  
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Olivier Galibert Offline
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somewhere else entirely
Originally Posted by Alegend45
That is true, but I'm not sure how to get IDE working for this driver.


Neither are we, it's an experimental sandbox for a reason.

#111454 - 11/29/17 08:26 PM Re: PC/XT/AT (inside) WIP topic [Re: Kale]  
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Bavarese Offline
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Bavarese  Offline
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Did you try to mount a 40 track image in a slot where only 80 track disks are allowed...?

You will have to change the slot to the exact drive type desired and reboot.

There is no auto-sensing of diskette drives as on a real machine - as far as i know smile

If you only want to access certain files, you should probably use one of the available Teledisk converters and then extract files from raw *.IMG. You could also post the TeleDisk so we can have a look at the parameters (no promises)...


Last edited by Bavarese; 11/29/17 08:34 PM.
#111455 - 11/29/17 09:50 PM Re: PC/XT/AT (inside) WIP topic [Re: Kale]  
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Justin Offline
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Nope, this is ibm5150 with the default 525dd drives. It actually keeps printing errors all the way through track 99 and wraps over into using punctuation characters instead of track numbers so I don't think it has anything to do with the real amount of tracks.

Last edited by Justin; 11/29/17 09:52 PM.
#111457 - 11/29/17 11:31 PM Re: PC/XT/AT (inside) WIP topic [Re: Bavarese]  
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Firehawke Offline
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Originally Posted by Bavarese
Did you try to mount a 40 track image in a slot where only 80 track disks are allowed...?

You will have to change the slot to the exact drive type desired and reboot.

There is no auto-sensing of diskette drives as on a real machine - as far as i know smile

If you only want to access certain files, you should probably use one of the available Teledisk converters and then extract files from raw *.IMG. You could also post the TeleDisk so we can have a look at the parameters (no promises)...



For what it's worth, 40-track disks work fine in 80-track drives on basically every machine I'd ever used. Where you _might_ run into issues is putting a 3.5" HD floppy image into a 5.25" HD emulated drive-- I haven't tried that in MAME, but I'd assume it'd turn into a real MESS. *cough*

#111461 - 11/30/17 12:17 AM Re: PC/XT/AT (inside) WIP topic [Re: Kale]  
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Bavarese Offline
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Germany
I memorize a statement from a member that "the modernized floppy subsystem has no concept of tracks, sides or densities".

The stability of some systems quickly deteriorates if one tries to mount differently formatted disks (say 40 track images in 80 track slots or HD images in DD slots).

Symptoms range from "file not found" errors to assertion failures because of the hard coded 100.000 byte (or cells) limit.

My experience is limited to the Rainbow-100 driver, but Rfka's findings seem to support my stance.

The solution (for me) was to introduce - and use - a separate slot for each format in the driver...

Last edited by Bavarese; 11/30/17 12:28 AM.
#111462 - 11/30/17 12:29 AM Re: PC/XT/AT (inside) WIP topic [Re: Kale]  
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Firehawke Offline
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Firehawke  Offline
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Right, now THAT would be an existing MAME limitation and a real problem..

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