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A X68000 arrived

Any 680x0 based information, repairs, images, upgrades and other cool stuff that is not Atari and Amiga based but based on the Motorola 68K range of processors
terriblefire
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Re: A X68000 arrived

Post by terriblefire »

arkadiusz.makarenko wrote: Sun Dec 24, 2023 10:34 am
terriblefire wrote: Sat Dec 23, 2023 11:31 pm

I'll need to jury rig a keyboard later too. MIght need help from @arkadiusz.makarenko
Hmmm... This one?
Screenshot_20231224-103201.png

Porting this to full USB shouldn't be too difficult.
https://github.com/Meaxy76/x68k-PS2converter

Testing and debugging might be more challenging.
Yeah i think a STM32 type setup would be great but as you say debugging would be difficult.
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"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."
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Re: A X68000 arrived

Post by terriblefire »

I think i might need 2 drives to boot? I tried this jumper setup but the thing just stops booting anything then

Screenshot 2023-12-24 at 11.24.14.png
Screenshot 2023-12-24 at 11.24.14.png (2.78 MiB) Viewed 6209 times

Wonder if my gotek needs updated or something
———
"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."
Higgy
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Re: A X68000 arrived

Post by Higgy »

Sorry, I meant S1 on one and S0 on the other.
Definitely worth updating FlashFloppy on Gotek.

I think your now just hitting the SRAM not being configured. It's so integral to the X68K working (correctly).

Interesting, I had a feeling that I could not get Memtest to display on my 1942 and I had to use VGA screen as Memtest is at some high Res.

Regarding Mouse/Keyboard you guys don't need to create your own, this works well and is in a small form factor:

https://nfggames.com/forum2/index.php?P ... pic=7130.0
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arkadiusz.makarenko
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Re: A X68000 arrived

Post by arkadiusz.makarenko »

Do you have jumpers across S0, S1 and JC?

Docs says this about jumper settings.

Screenshot_20231224-122244.png
Screenshot_20231224-122244.png (243.71 KiB) Viewed 6197 times
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terriblefire
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Re: A X68000 arrived

Post by terriblefire »

Higgy wrote: Sun Dec 24, 2023 12:21 pm Sorry, I meant S1 on one and S0 on the other.
Definitely worth updating FlashFloppy on Gotek.

I think your now just hitting the SRAM not being configured. It's so integral to the X68K working (correctly).
But I get the same issue from SRAM wipe disk. So it must be a disk issue.
Interesting, I had a feeling that I could not get Memtest to display on my 1942 and I had to use VGA screen as Memtest is at some high Res.
After its running just turn the 1942 off and on and it syncs happily. It doesnt initially.
Regarding Mouse/Keyboard you guys don't need to create your own, this works well and is in a small form factor:

https://nfggames.com/forum2/index.php?P ... pic=7130.0
I couldnt get that immediately and we have several projects that do USB support with STM32 like the TFMSX.. so i was thinking to just hack something quickly with what i have.
———
"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."
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Re: A X68000 arrived

Post by Higgy »

arkadiusz.makarenko wrote: Sun Dec 24, 2023 12:24 pm Do you have jumpers across S0, S1 and JC?

Docs says this about jumper settings.
Screenshot_20231224-122244.png
I am looking at my Goteks with a clearer head.

Drive 0 - S0 and JC
Drive 1 - S1

No cable twist between Drive 0 and Drive 1
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Re: A X68000 arrived

Post by terriblefire »

Had absolutely no joy with the Gotek's @Chrissy(?) sent me a couple of 5.25" disks to try so i'll give them a go later.

Also a 5 of the PCBs for this project turned up to today as replacements for my PSU.

https://github.com/leaded-solder/x68000-pro-picopsu

3 are going spare if anyone wants one. I can divide the cost of the PCB order by 5 and add shipping. Its roughly a £5 per PCB.
———
"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."
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Re: A X68000 arrived

Post by terriblefire »

So absolutely no joy. No floppy combination works.

Same symptoms as this thread.. https://nfggames.com/forum2/index.php?topic=6755.40
———
"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."
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Re: A X68000 arrived

Post by Higgy »

@terriblefire when you said:

And the other 2 disks (unsure of what they are as its just gotek numbers)

Are those from the archive I posted? And was the Memtest also from that archive?

Also you have tried actual 5 1/4 disks now?

You've had so something booting so that is a good sign. When I had major weirdness it was down to the SRAM. That configuration is really the life blood of the computer. On my Expert 2 it would load Human OS but then not Masterdisk and the text (dos style white on black screen) went 2x size!?!
I replaced the actual SRAM chips and it's been solid. I took it that it was powered on/tested with the Cap leaked PSU and it fried the SRAM. Maybe delicate chips like C64/Spectrums which can have RAM failure.

Anyway if you did got some of my Gotek images working, I will post some more up tomorrow (might be afternoon). As I could get somethings to boot even with fudged SRAM. Have you got the battery installed?

Don't go taking the PCB apart just yet, I am hoping it is just pesky SRAM gremlins :)
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Re: A X68000 arrived

Post by terriblefire »

Higgy wrote: Thu Dec 28, 2023 11:12 pm @terriblefire when you said:

And the other 2 disks (unsure of what they are as its just gotek numbers)

Are those from the archive I posted? And was the Memtest also from that archive?

Also you have tried actual 5 1/4 disks now?

You've had so something booting so that is a good sign. When I had major weirdness it was down to the SRAM. That configuration is really the life blood of the computer. On my Expert 2 it would load Human OS but then not Masterdisk and the text (dos style white on black screen) went 2x size!?!
I replaced the actual SRAM chips and it's been solid. I took it that it was powered on/tested with the Cap leaked PSU and it fried the SRAM. Maybe delicate chips like C64/Spectrums which can have RAM failure.

Anyway if you did got some of my Gotek images working, I will post some more up tomorrow (might be afternoon). As I could get somethings to boot even with fudged SRAM. Have you got the battery installed?

Don't go taking the PCB apart just yet, I am hoping it is just pesky SRAM gremlins :)
I've tried all of the above. Real 5" disks, Goteks and HxCs. Only memtest68k boots. I'd bet that that other game that guy got working will work too. Nothing else boots. Master disks sulk so do games.

I removed both 5" disks and cleaned the heads. @Chrissy sent me a Master disk and it just gets spat out again.
———
"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."
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