RJs Adventures in Mega land III

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PaulJ
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Re: RJs Adventures in Mega land III

Post by PaulJ » Mon Jan 04, 2021 6:22 pm

Not really an issue of @rubber_jonnie breaking his finger. However burnt fingers are always a possiblity when Jon and the infamous soldering iron are in the same room. :fire: :fire: :fire:

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rubber_jonnie
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Re: RJs Adventures in Mega land III

Post by rubber_jonnie » Mon Jan 04, 2021 10:24 pm

PaulJ wrote:
Mon Jan 04, 2021 6:22 pm
Not really an issue of @rubber_jonnie breaking his finger. However burnt fingers are always a possiblity when Jon and the infamous soldering iron are in the same room. :fire: :fire: :fire:
HEY!!!

Why are you lot ganging up on me AGAIN!!

I don't even have that soldering iron any more!!!

AND I haven't yet burned myself on the new one, or the hot air gun or the de-soldering gun!!

So there!!!

:fire: :fire: :fire: :fire: :fire:
Collector of old Atari things:
800XL + Ultimate 1MB, 2x 1010 cassette, 1050 + Happy mod, 65XE (128k +APE Warp) & XC12, SIO2SD, 2600jr, 7800 and Lynx II
Atari 520ST (1Meg), 1040STF long button floppy, 2x 1040 STFMs + Gotek, 2x 4160STE with 32Mhz booster, ROM switcher, Mega ST1, Mega ST4, not to mention various bare ST boards for testing including a PAK 68/2 :)
Plus the rest..
Amiga stuff, Mac stuff, Sinclair stuff etc...
www.electronicnothingness.co.uk

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JezC
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Re: RJs Adventures in Mega land III

Post by JezC » Mon Jan 04, 2021 10:34 pm

@rubber_jonnie Are you trying to jinx yourself here? At least put a 'yet' at the end! ;)

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Re: RJs Adventures in Mega land III

Post by rubber_jonnie » Mon Jan 04, 2021 11:08 pm

JezC wrote:
Mon Jan 04, 2021 10:34 pm
@rubber_jonnie Are you trying to jinx yourself here? At least put a 'yet' at the end! ;)
:dizzy:
Collector of old Atari things:
800XL + Ultimate 1MB, 2x 1010 cassette, 1050 + Happy mod, 65XE (128k +APE Warp) & XC12, SIO2SD, 2600jr, 7800 and Lynx II
Atari 520ST (1Meg), 1040STF long button floppy, 2x 1040 STFMs + Gotek, 2x 4160STE with 32Mhz booster, ROM switcher, Mega ST1, Mega ST4, not to mention various bare ST boards for testing including a PAK 68/2 :)
Plus the rest..
Amiga stuff, Mac stuff, Sinclair stuff etc...
www.electronicnothingness.co.uk

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rubber_jonnie
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Re: RJs Adventures in Mega land III

Post by rubber_jonnie » Sat Jan 16, 2021 4:52 pm

Well, this Mega is now pretty much done and dusted!!

:girldance: :girldance: :girldance:

The final hurdle was the arrival of the PSU frame from a friendly FaceBooker in the Netherlands.

The PSU (I already had a spare Mega PSU PCB) was quickly completed:

PSU_Rebuilt.jpg
PSU_Rebuilt.jpg (117.75 KiB) Viewed 442 times

And finalised later with the addition of the fan. I may look to get a quieter one later.

It's had:

1. DMA replacement to fix the FDD problems.
2. Marpet style SIMM memory upgrade to take it to 4MB. I could never get the strange upgrade to work and don't know if it was the RAM I got to fill the empty slots, or something else.
3. Replaced all the bus pull up resistors as per the mandatory fixes.
4. WD1772 data bus pull up resistors as per the mandatory fixes.
5. Cleaned up corrosion in the battery box and reinstalled the battery cable.
6. Upgrade to TOS 1.04 with IDE patch and boot up info screen.
7. 'New' floppy drive.
8. CF hard drive with Megabus IDE adapter.
9. Damn good clean!

Here's what it looks like:

Inside_1.jpg
Inside_1.jpg (132.34 KiB) Viewed 442 times
inside_2.jpg
inside_2.jpg (141.67 KiB) Viewed 442 times

And getting a test done of the newly installed RAM.

Testing.jpg
Testing.jpg (113.04 KiB) Viewed 442 times

I will do one last thing and will connect up my new test harness and verify everything works as it should, but so far it is :)
Collector of old Atari things:
800XL + Ultimate 1MB, 2x 1010 cassette, 1050 + Happy mod, 65XE (128k +APE Warp) & XC12, SIO2SD, 2600jr, 7800 and Lynx II
Atari 520ST (1Meg), 1040STF long button floppy, 2x 1040 STFMs + Gotek, 2x 4160STE with 32Mhz booster, ROM switcher, Mega ST1, Mega ST4, not to mention various bare ST boards for testing including a PAK 68/2 :)
Plus the rest..
Amiga stuff, Mac stuff, Sinclair stuff etc...
www.electronicnothingness.co.uk

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Re: RJs Adventures in Mega land III

Post by atari030 » Mon Jan 18, 2021 6:26 am

Fantastic, well done.

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rubber_jonnie
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Re: RJs Adventures in Mega land III

Post by rubber_jonnie » Mon Jan 18, 2021 11:22 am

atari030 wrote:
Mon Jan 18, 2021 6:26 am
Fantastic, well done.
Cheers :)
Collector of old Atari things:
800XL + Ultimate 1MB, 2x 1010 cassette, 1050 + Happy mod, 65XE (128k +APE Warp) & XC12, SIO2SD, 2600jr, 7800 and Lynx II
Atari 520ST (1Meg), 1040STF long button floppy, 2x 1040 STFMs + Gotek, 2x 4160STE with 32Mhz booster, ROM switcher, Mega ST1, Mega ST4, not to mention various bare ST boards for testing including a PAK 68/2 :)
Plus the rest..
Amiga stuff, Mac stuff, Sinclair stuff etc...
www.electronicnothingness.co.uk

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JezC
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Re: RJs Adventures in Mega land III

Post by JezC » Mon Jan 18, 2021 3:01 pm

Looking good... just needs a more sympathetic style of keyboard to complete the look!

;)

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rubber_jonnie
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Re: RJs Adventures in Mega land III

Post by rubber_jonnie » Mon Jan 18, 2021 3:46 pm

JezC wrote:
Mon Jan 18, 2021 3:01 pm
Looking good... just needs a more sympathetic style of keyboard to complete the look!

;)
I don't know, I really like my little Cherry :)

I even still have a joystick and mouse port thanks to my Eiffel. :)
Collector of old Atari things:
800XL + Ultimate 1MB, 2x 1010 cassette, 1050 + Happy mod, 65XE (128k +APE Warp) & XC12, SIO2SD, 2600jr, 7800 and Lynx II
Atari 520ST (1Meg), 1040STF long button floppy, 2x 1040 STFMs + Gotek, 2x 4160STE with 32Mhz booster, ROM switcher, Mega ST1, Mega ST4, not to mention various bare ST boards for testing including a PAK 68/2 :)
Plus the rest..
Amiga stuff, Mac stuff, Sinclair stuff etc...
www.electronicnothingness.co.uk

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rubber_jonnie
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Re: RJs Adventures in Mega land III

Post by rubber_jonnie » Mon Jan 18, 2021 4:01 pm

So here's the gang all together:

The_Gang.jpg
The_Gang.jpg (76.36 KiB) Viewed 367 times

Top one is my Mega4 which I had all sorts of fun and games with and now is an awesome machine, middle is a Mega ST1 which has been upgraded to a patched IDE compliant TOS 1.04 and PPs Megabus IDE with a 2.5" HDD, plus a 286 ATOnce PC adapter card.

Finally the subject of this blog, a Mega ST1 with 4MB upgrade, which also put me through the mill. Nice to have them all running now, in fact I don't think I have a dead ST in the house :) (I think that's probably tempting fate if I'm honest!!)
Collector of old Atari things:
800XL + Ultimate 1MB, 2x 1010 cassette, 1050 + Happy mod, 65XE (128k +APE Warp) & XC12, SIO2SD, 2600jr, 7800 and Lynx II
Atari 520ST (1Meg), 1040STF long button floppy, 2x 1040 STFMs + Gotek, 2x 4160STE with 32Mhz booster, ROM switcher, Mega ST1, Mega ST4, not to mention various bare ST boards for testing including a PAK 68/2 :)
Plus the rest..
Amiga stuff, Mac stuff, Sinclair stuff etc...
www.electronicnothingness.co.uk

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