TF534 Sources Published (includes firmware for 520/530 and 534)

TF534 - 68030 + More RAM Board (More compatible with amiga hardware)

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terriblefire
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Re: TF534 Sources Published (includes firmware for 520/530 and 534)

Post by terriblefire »

maximevince wrote: Wed Apr 03, 2024 12:28 pm Understood.
Would you be willing to set up a collaboration with me to make a smaller version of the tf536?
Without having to release them as open source, that is.
What is the use case?

I have a plan to do a new version of it but its for the X68000.
———
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indicates how much hurting you shall receive."
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Re: TF534 Sources Published (includes firmware for 520/530 and 534)

Post by maximevince »

Cool! I did not know about the X68000.

The idea is to make the PCB smaller by compressing the routing a bit, such that it would fit the "Denise" motherboard (https://www.enterlogic.se/?page_id=180).
Right now it's sitting over the Zorro slot, which makes that slot unusable.
Additionally, I believe it would be beneficial to fit in the 100x100mm size of the cheap JLCPCB option. It's "just" outside of that now, by a few mm, which is unfortunate.

Apart from the routing changes and the board size, your design (and copyright) would be 100% kept as-is. I don't need any credit for those minimal changes, but right now I can't make them. (Because of the No Derivatives license)
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Re: TF534 Sources Published (includes firmware for 520/530 and 534)

Post by terriblefire »

maximevince wrote: Thu Apr 04, 2024 9:49 am Cool! I did not know about the X68000.

The idea is to make the PCB smaller by compressing the routing a bit, such that it would fit the "Denise" motherboard (https://www.enterlogic.se/?page_id=180).
Right now it's sitting over the Zorro slot, which makes that slot unusable.
Additionally, I believe it would be beneficial to fit in the 100x100mm size of the cheap JLCPCB option. It's "just" outside of that now, by a few mm, which is unfortunate.

Apart from the routing changes and the board size, your design (and copyright) would be 100% kept as-is. I don't need any credit for those minimal changes, but right now I can't make them. (Because of the No Derivatives license)
It cannot be compressed much without compromising the signal integrity to the point where it will not work. Its really on the limit for 50Mhz as is. Trust me if i could get it into 100mm X 100mm and still work i would have done it. I chose 7mil spacing for a reason. The low speed signal stuff could be compressed a fraction but the routing is not tight there.
———
"It is not necessarily a supply voltage at no load, but the amount of current it can provide when touched that
indicates how much hurting you shall receive."
maximevince
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Re: TF534 Sources Published (includes firmware for 520/530 and 534)

Post by maximevince »

I completely agree about taking care about signal integrity. Especially at 50 MHz!
However, we're talking about 4.14 mm in the x-direction here, which I believe is easily achievable. (y-direction is only 0.56 mm over the 100 mm limit)

IC7 and IC8 could be closer to one another by 1.5mm without any issues.
There's another 1.5mm between IC7 and all the bus traces.
On the outer side of the 68k socket toward the amiga, there's also a single lost trace, that could be moved inside of the footprint. There's another 1 or 1.5mm to win there.

Those changes alone would make it fit inside 100x100, and would solve the Zorro header clearance on the left side of the 68k socket.
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Re: TF534 Sources Published (includes firmware for 520/530 and 534)

Post by terriblefire »

maximevince wrote: Thu Apr 04, 2024 12:42 pm IC7 and IC8 could be closer to one another by 1.5mm without any issues.
I'm not touching IC7 and IC8. I did that on the TF4060 and i have had a world of pain. those traces need to be those lengths.
———
"It is not necessarily a supply voltage at no load, but the amount of current it can provide when touched that
indicates how much hurting you shall receive."
maximevince
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Joined: Tue Apr 02, 2024 7:16 pm

Re: TF534 Sources Published (includes firmware for 520/530 and 534)

Post by maximevince »

Okay, lets not touch those, then :)
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