QL on MIST FPGA board

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XorA
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Re: QL on MIST FPGA board

Postby XorA » Thu Nov 12, 2015 11:13 am

Luk wrote:This indeed sounds great. I guess this more or less declares the QLSD BDI_bin file as a standard to exchange QL progs and files.


Which is the same format as qubide uses ;-) Just byteswapped!


Luk
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Re: QL on MIST FPGA board

Postby Luk » Sat Nov 14, 2015 8:28 am

Yes, I used Hex Editor on a ql_bdi.bin file, did a byte flip and...I got a file that was recognised as a qubide file by the Qubide program from José! 8-)


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Peter
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Re: QL on MIST FPGA board

Postby Peter » Thu Nov 19, 2015 11:14 am

bixio60 wrote:- better situation will be to emulate Qx0 if ever possible
I saw Peter Graf partecipate to this , at least to support QL-SD, any opinion?


I guess my contribution for QL on MIST is not mainly QL-SD, but debugging the TG68 FPGA core, so it does not just run Atari and Amiga Code, but also QL code. The TG68K.C (which is probably used on the MIST) is a successor of the TG68 and already has the QL bugfixes included.

The original author of the TG68 and TG68K.C, Tobias Gubener, had debugged his core by letting it run in parallel with a real 68K CPU in hardware. Since I do not have such a setup, it was a much harder task to debug the CPU. A misimplemented instruction usually does not cause a problem immediately, but often tens or hundreds instructions later, or never at all.

I have not yet looked at the MIST implementation, but from what I heard, it is a close implementation of the original QL. The Q68 is closer to the Qx0, especially keyboard and highcolor graphics are identical, so a SMQS/E port might be easier for the Q68 than for the MIST.

I could port QDOS Classic from the Q60 to the Q68 myself in one day, so if SMSQ/E is as nicely structured as QDOS Classic, the amount of work should be similar (for someone who is familiar with SMSQ/E, which I am not).


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Baert
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Re: QL on MIST FPGA board

Postby Baert » Sat Nov 21, 2015 7:13 pm

I'd love to try out the QL core on my MiST. But unfortunately it's broken.
The tiny USB Port ist torn apart the mainboard. I was always careful, but
I killed it. :cry:


Best regards,
Baert
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Derek_Stewart
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Re: QL on MIST FPGA board

Postby Derek_Stewart » Sat Nov 21, 2015 9:52 pm

Baert wrote:I'd love to try out the QL core on my MiST. But unfortunately it's broken.
The tiny USB Port ist torn apart the mainboard. I was always careful, but
I killed it. :cry:


Hi,

I would go back to the supplier and explain there was an accident, they may repair the board.


Regards,

Derek
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tofro
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Re: QL on MIST FPGA board

Postby tofro » Sat Nov 21, 2015 10:59 pm

The not very reliable µ-USB-Connection is a known problem (not only) with the MiST.

But MiST has a work-around built in:

Here
https://code.google.com/p/mist-board/wiki/PwrDcJack

Is a description on how to retrofit a 5V DC Power Jack to the MiST (The PCB is already prepared for this mod).

Regards
Tobias


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Baert
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Re: QL on MIST FPGA board

Postby Baert » Sun Nov 22, 2015 12:08 am

Yes, I know the DC Power Jack mod. But I have in mind to
install a new and more reliable USB connection.

Btw: Lotharek sends no invoice!


Best regards,
Baert
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Derek_Stewart
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Re: QL on MIST FPGA board

Postby Derek_Stewart » Sun Nov 22, 2015 9:07 pm

Baert wrote:Yes, I know the DC Power Jack mod. But I have in mind to
install a new and more reliable USB connection.

Btw: Lotharek sends no invoice!


Hi,

I would do the DC Power Jack mod, the mini USB socket looks too flimsy.

The surface mounted pads that have been been torn off the board should be repairable. Try posting photograph, there maybe advice available.


Regards,

Derek
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Baert
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Re: QL on MIST FPGA board

Postby Baert » Wed Nov 25, 2015 3:36 am

I didn't open the case yet. Therefore I only have this picture...
Attachments
tornusb.jpg


Best regards,
Baert
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Derek_Stewart
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Re: QL on MIST FPGA board

Postby Derek_Stewart » Wed Nov 25, 2015 1:48 pm

Hi,

Here is a picture of the MIST board:

mist board.jpg
MIST Board


It looks like you have ripped the micro USB connector off the board, the electrical connection are surface mounted, so could be wired up to the original connector or new connector mounted elsewhere.


Regards,

Derek

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