exxos blog - random goings on

Post by **Icky** » Fri May 03, 2019 5:47 pm

exxos wrote: ↑Fri May 03, 2019 5:43 pm
Icky wrote: ↑Fri May 03, 2019 5:41 pm Been doing the same but fell at the first hurdle. I could not find my old skool tools.
Took me a while to find my track cutter

Exactly - that's what I am still hunting. I think the office is now upside down (not that you could tell as its a mess always anyway).

Post by **exxos** » Fri May 03, 2019 5:50 pm

Icky wrote: ↑Fri May 03, 2019 5:47 pm Exactly - that's what I am still hunting. I think the office is now upside down (not that you could tell as its a mess always anyway).

5mm drill bit

Post by **Icky** » Fri May 03, 2019 5:51 pm

exxos wrote: ↑Fri May 03, 2019 5:50 pm
Icky wrote: ↑Fri May 03, 2019 5:47 pm Exactly - that's what I am still hunting. I think the office is now upside down (not that you could tell as its a mess always anyway).
5mm drill bit

Yeah - I was trying to avoid going out to the garage as its raining. Oh well - time to get wet.

Post by **exxos** » Fri May 03, 2019 5:56 pm

Now to figure out how to wire this thing in

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Post by **Icky** » Fri May 03, 2019 6:17 pm

exxos wrote: ↑Fri May 03, 2019 5:56 pm Now to figure out how to wire this thing in

I have forgotten how much I hate these boards.

Post by **exxos** » Fri May 03, 2019 8:54 pm

So mine is done, but long story short, it is unstable as hell

It will only even attempt to boot with a IMP chipset... I have removed the blitter, and tried a few things, but only seem to make it worse

It is one of those things that it may be possible to get working stable at if a lot of time is spent on it, but if we spend a lot of time on this, other projects are not getting finished

I don't have any more time tonight, and may have a play around with it a little more on Monday, but I think it will be better spending time on getting the FPGA cores up and running.

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Post by **PhilC** » Fri May 03, 2019 9:43 pm

Is it worth you trying the SMT MMU and GLUE?

Post by **exxos** » Fri May 03, 2019 10:23 pm

Muahahaha

For some reason I had R150 pulled out causing I assume no pull up on BGACK.. That should have been fixed by a resistor mod, unless the wire came off...So that was causing the floppy drive to go not in all sorts of chaos..

Also the 74F04 chip which I used as the 32MHz & 16MHz buffer, seriously sucks

I rooted the oscillator directly to the shifter and MMU and it now seems pretty stable, before I could not even get to the desktop..

I have also currently got a -38 MMU in place (I had removed the IMP one) I don't know if this was a factor or not, but I dare not touch anything while it is working

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Cyprian · Post by **Cyprian** » Fri May 03, 2019 10:33 pm

Post by **PhilC** » Fri May 03, 2019 10:36 pm

Does make you wonder why nobody at Atari did this back in the day.

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