zChrises 520 STfm + TF536 project.

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zChris
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Re: zChrises 520 STfm + TF536 project.

Post by zChris »

Technoid6502 wrote: Sat Apr 03, 2021 11:04 pm As for programming the TF536, I used a Xylinx platform device with the Xylinx ISE 14.7 under WIndows 7 (in a virtual machine under Linux). If you use other versions of the Xilinx software, the machine will report that nothing is on the chain. So, best guess, is that you are not running v14.7.

Best,

Jeff
Hello Jeff,

What cable did you use? I tried to talk with it with a Raspberry Pi 2 Model B.

/zChris
zChris
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Re: zChrises 520 STfm + TF536 project.

Post by zChris »

Alright some update.

I have gotten exxos PSU but there doesnt seem to be any improvement.

Are there any caps on the motherboard that needs to be replaced ?

Best regards zChris
Technoid6502
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Re: zChrises 520 STfm + TF536 project.

Post by Technoid6502 »

zChris wrote: Mon Apr 19, 2021 1:17 pm Hello Jeff,

What cable did you use? I tried to talk with it with a Raspberry Pi 2 Model B.
This is the cable I used, but I bought mine on ebay in 2019 for about half what amazon is charging. Use the ISE 14.7 software with it and you'll get traction. Later versions of the software see the device, but won't do anything with it.

51L2TegAwnL._AC_SL1000_.jpg
51L2TegAwnL._AC_SL1000_.jpg (30.79 KiB) Viewed 3852 times
zChris
Posts: 194
Joined: Fri Nov 27, 2020 10:13 pm

Re: zChrises 520 STfm + TF536 project.

Post by zChris »

Hello,

Ive been able to got ahold of DiagROM's. When i use the roms with regular CPU it comes to the menu and i can do a memory test. But when i try with TF536 it looks like this: https://photos.app.goo.gl/s9XTcdU1v9tfoJ1q9

After it got stuck at the darkgreen image i pressed the reset button. And thats when it flashes.

best regards zChris
zChris
Posts: 194
Joined: Fri Nov 27, 2020 10:13 pm

Re: zChrises 520 STfm + TF536 project.

Post by zChris »

Hello,

I have measured A0(Pin29) and A4(Pin32) on the CPU with a logic analyser.

A0 With regular CPU:
A0_M68000.png
A0_M68000.png (66.24 KiB) Viewed 3833 times

A4 With regular CPU:
A4_M68000.png
A4_M68000.png (73.96 KiB) Viewed 3833 times

A0 with TF536:
A0_TF536.png
A0_TF536.png (61.76 KiB) Viewed 3833 times

A4 with TF536:
A4_TF536.png
A4_TF536.png (57.92 KiB) Viewed 3833 times

I think this can be a problem?
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exxos
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Re: zChrises 520 STfm + TF536 project.

Post by exxos »

I am slightly confused what you are measuring because the 68000 doesn't have A0....
https://www.exxosforum.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxosforum.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.
viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
Just because a lot of people agree on something, doesn't make it a fact. ~exxos ~
People should find solutions to problems, not find problems with solutions.
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PhilC
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Re: zChrises 520 STfm + TF536 project.

Post by PhilC »

Just watched the video, the flashing is right, I'm wondering if you connect a serial cable to your ST if you get an output on the serial port as it certainly looks like it's booting Diagrom but there is an error with something on the ST.

Do you want to send the ST and TF536 to me to take a look at it @zChris ?
If it ain't broke, test it to Destruction.
zChris
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Re: zChrises 520 STfm + TF536 project.

Post by zChris »

exxos wrote: Thu Apr 22, 2021 9:48 pm I am slightly confused what you are measuring because the 68000 doesn't have A0....
Im sorry exxos its A1 that im measing (pin 29)
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Re: zChrises 520 STfm + TF536 project.

Post by exxos »

zChris wrote: Thu Apr 22, 2021 10:13 pm Im sorry exxos its A1 that im measing (pin 29)
Have to measured on resistance to see if that pin has like 10K pull up to 5V ? It looks like it is not being driven active high properly.. It could just be one of those things where you need to do the mandatory fixes to solve such problems..
https://www.exxosforum.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxosforum.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.
viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
Just because a lot of people agree on something, doesn't make it a fact. ~exxos ~
People should find solutions to problems, not find problems with solutions.
zChris
Posts: 194
Joined: Fri Nov 27, 2020 10:13 pm

Re: zChrises 520 STfm + TF536 project.

Post by zChris »

exxos wrote: Thu Apr 22, 2021 10:16 pm
zChris wrote: Thu Apr 22, 2021 10:13 pm Im sorry exxos its A1 that im measing (pin 29)
Have to measured on resistance to see if that pin has like 10K pull up to 5V ? It looks like it is not being driven active high properly.. It could just be one of those things where you need to do the mandatory fixes to solve such problems..
Dont follow your first senctence but i have done the mandatory changes that is not related to discdrive. Like changen the netresistors to 10K. Also had that resistor fix on C68 thing.
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