Thought I'd share my Mega ST4, now I've got it all working together. only thing I haven't added is the T28 but that may go into my spare Mega.
Specs:
Mega ST4
TOS Switcher
AT-Speed 286 16MHz
68881 Copro card
PICO PSU
Soph's Mega ST4
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SophieRose
- Posts: 33
- Joined: 28 Dec 2020 04:47
- Location: Leamington Spa
Soph's Mega ST4
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Musician and Atari ST user. https://sophie-rose.bandcamp.com
Mega ST4 T28, 1040STE & 520STM, Amiga 600, Link 480Z, Amstrad 6128 plus, Timex2048, C128, C64, MSX HB201P. Plus too many more.
Mega ST4 T28, 1040STE & 520STM, Amiga 600, Link 480Z, Amstrad 6128 plus, Timex2048, C128, C64, MSX HB201P. Plus too many more.
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derkom
- Moderator

- Posts: 1231
- Joined: 29 Jul 2018 18:45
Re: Soph's Mega ST4
Joining the exxos forum high-rise club! :dualthumbup:
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SophieRose
- Posts: 33
- Joined: 28 Dec 2020 04:47
- Location: Leamington Spa
Re: Soph's Mega ST4
Here she is doing her 286 party trick. :D Tower of Power :lol:
Musician and Atari ST user. https://sophie-rose.bandcamp.com
Mega ST4 T28, 1040STE & 520STM, Amiga 600, Link 480Z, Amstrad 6128 plus, Timex2048, C128, C64, MSX HB201P. Plus too many more.
Mega ST4 T28, 1040STE & 520STM, Amiga 600, Link 480Z, Amstrad 6128 plus, Timex2048, C128, C64, MSX HB201P. Plus too many more.
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Darklord
- Site sponsor

- Posts: 1603
- Joined: 20 Sep 2017 13:41
- Location: Prestonsburg
Re: Soph's Mega ST4
Well done! I have to agree, if you put small figures around the motherboard, it would
almost look like a futuristic city! :)
almost look like a futuristic city! :)
Welcome To DarkForce! www.darkforce.org "The Fuji Lives.!"
Atari SW/HW based BBS-Telnet:darkforce-bbs.dyndns.org 1040
Atari SW/HW based BBS-Telnet:darkforce-bbs.dyndns.org 1040
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Icky
- Site Admin

- Posts: 4378
- Joined: 03 Sep 2017 10:57
- Location: UK
Re: Soph's Mega ST4
Nice setup @SophieRose. I have the same AT Speed board on my H5. You might want to get hold of a 80287 co pro on eBay there are plenty around.
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rubber_jonnie
- Site Admin

- Posts: 14912
- Joined: 17 Aug 2017 19:40
- Location: Essex
Re: Soph's Mega ST4
Interesting Stack you have there @SophieRose
I presume that the FPU board is the one in the Megabus slot?
I'd like some sort of video adapter for the Mega of mine that has that bus free. Two of mine have an IDE adapter in that slot.
I also have a similar PC card in one, they are 'interesting'
Nice work.
I presume that the FPU board is the one in the Megabus slot?
I'd like some sort of video adapter for the Mega of mine that has that bus free. Two of mine have an IDE adapter in that slot.
I also have a similar PC card in one, they are 'interesting'
Nice work.
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
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mrbombermillzy
- Moderator

- Posts: 2287
- Joined: 03 Jun 2018 19:37
Re: Soph's Mega ST4
I was thinking of doing a shout round at some point, to see how many people want a MegaBus to ISA adapter.rubber_jonnie wrote: 16 Dec 2021 08:41 I'd like some sort of video adapter for the Mega of mine that has that bus free.
Then go and ask Frank Lukas very nicely if he would interested in building up a batch.
Was just waiting for Xmas to be over really before I asked, as people may have some cash by then.
@SophieRose Nice system BTW. Truly lives up to the name 'Mega'.
Glad you found a PC Speed eventually. :)
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rubber_jonnie
- Site Admin

- Posts: 14912
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- Location: Essex
Re: Soph's Mega ST4
I'd definitely be interested in a Megabus ISA adapter even if it was just a PCB I had to build, also would like to get my hands on a VME to ISA adapter for my MSTE.mrbombermillzy wrote: 16 Dec 2021 09:02I was thinking of doing a shout round at some point, to see how many people want a MegaBus to ISA adapter.rubber_jonnie wrote: 16 Dec 2021 08:41 I'd like some sort of video adapter for the Mega of mine that has that bus free.
Then go and ask Frank Lukas very nicely if he would interested in building up a batch.
Was just waiting for Xmas to be over really before I asked, as people may have some cash by then.
@SophieRose Nice system BTW. Truly lives up to the name 'Mega'.
Glad you found a PC Speed eventually. :)
Apologies @SophieRose we :threadjacked: your post a little!!
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
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frank.lukas
- Posts: 812
- Joined: 19 Jan 2018 11:52
Re: Soph's Mega ST4
You can buy from me Nova VME adapter and/or STGA Mega ST Bus adapter as ready build up and tested or complete parts set incl. pcb ...
https://forum.atari-home.de/index.php?topic=16211.0
https://forum.atari-home.de/index.php/t ... #msg216246
https://forum.atari-home.de/index.php?topic=16211.0
https://forum.atari-home.de/index.php/t ... #msg216246
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