Rev C070859-001 Rev2.0 Australia 1989

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krisfeigl
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Rev C070859-001 Rev2.0 Australia 1989

Post by krisfeigl »

Hi Guys

I need help in finding out what I can do with this collectors item as I have never seen this motherboard before.

Surface mount PLCC MMU with unpopulated blitter socket and 2 chip 1.02 bios i think.

Got all excited about upgrades until I saw the surface mount PLCC chips.

I have a new UltraSatan and 1.02 is uselessly limiting. I assume I could socket the 68000 and fit a v2.3 accelerator and the 2 chip bios adapter possibly running 2.06 and 1.04 but how can I add 4mb of ram to this setup?

The Shifter looks normal under the shield cover but not socketed unfortunately.

I have a second older PAL STFM already expanded to 1MB of mboard dram and a GOTEK. I have no idea what board it has. A friend also has a spare 1040STFM that I might be able to expand.

Any advice welcome.

Kris. :-)
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exxos
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Re: Rev C070859-001 Rev2.0 Australia 1989

Post by exxos »

You can still upgrade the RAM, ROM, CPU etc on that board. Just you cant use "plug in" RAM modules over the MMU.
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rubber_jonnie
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Re: Rev C070859-001 Rev2.0 Australia 1989

Post by rubber_jonnie »

You won't be going beyond TOS 1.06 I think, 1.62 and above are for STE. 1.04 is perfectly good IMHO for these machines, and you could simply get a 2 chip 1.04 upgrade and drop it in. Exxos has what you need here: https://www.exxosforum.co.uk/atari/store2/#0033

RAM upgrades can be found here https://www.exxosforum.co.uk/atari/store2/#0035, though the surface mount MMU does effectively exclude you from those types of upgrade.

I'd suggest https://www.exxosforum.co.uk/atari/store2/#0020 and https://www.exxosforum.co.uk/atari/store2/#0111 are your best options.

Or alternatively you can buy 16x 41256 RAM chips, sockets and de-coupling capacitors elsewhere (eBay,UtSource etc) and fit them in the empty positions. That does come with a caveat though, which is to buzz out the empty circuits to ensure they do all connect as they should, or you can run into problems with the other banks.

As for the surface mount MMU, and I'm guessing GLUE chips, though they are a pain from the PoV of certain types of RAM upgrade. BUT there is an upside in that you don't have to deal with crappy PLCC sockets! They are a huge pain TBH.

Also, if you can get hold of a Blitter from a scrap machine, and either an original socket, or one of these https://www.exxosforum.co.uk/atari/store2/#0113, then you can upgrade that too.

Blitters are getting rather like Unicorns atm though sadly.
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...
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Re: Rev C070859-001 Rev2.0 Australia 1989

Post by exxos »

The 0020 "simm" upgrade has been redesigned, while that wont be produced again, there is a alternative in the making (test pcbs just arrived in fact) but need to build one up and test it yet...
https://www.exxosforum.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxosforum.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.
viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
Just because a lot of people agree on something, doesn't make it a fact. ~exxos ~
People should find solutions to problems, not find problems with solutions.
krisfeigl
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Re: Rev C070859-001 Rev2.0 Australia 1989

Post by krisfeigl »

Hi Exxos

Ooooh the new Simm Ram board sounds exciting for this project

I might order the v2.3 accelerator and the 1.02/1.04 2 chip rom board [0131] to suit now. I am puzzled about the 1.04/2.06 bios option [0050]. Does the v2.3 accelerator which is conditional for this hack permit 2.06 on an stfm. I know complex hacks permit this but understand this bios was primarily for STE boards which I am still waiting to find in Australia. Is there any benefit in doing this?

If you want a guinea pig let me know for that new SIMM ram expansion to replace the [0020] board as I need a worthy STFM to connect to my Ultrasatan. My other 1mb STFM with Gotek on 1.02 I want to leave as is for game compatibility as most things work. I was gonna order your 512KB 16 chip kit for this board but I dont want to add that ram only to have to remove it again to fit the 4mb SIMM board. I own an Amiga 4000 so have a few low profile 4mb 2 chip 72 pin simms which would be ideal.

I own a PC shop and have purchased surface mount hot air reflow equipment and desoldering vacuum gun so might be a good candidate to try this out. This STFM board was being kept for spares but might become my main unit if all goes well. I guess I may as well get the blitter socket kit too in the vain hope that I can pickup a Blitter chip some time into the future.

Exxos let me know your thoughts on this when you get a chance.

Thanks again for your support of this platform. May the Amiga and Atari ST live FOREVER in harmony. :-)
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Re: Rev C070859-001 Rev2.0 Australia 1989

Post by rubber_jonnie »

krisfeigl wrote: Thu Feb 21, 2019 10:39 am
I might order the v2.3 accelerator and the 1.02/1.04 2 chip rom board [0131] to suit now. I am puzzled about the 1.04/2.06 bios option [0050]. Does the v2.3 accelerator which is conditional for this hack permit 2.06 on an stfm. I know complex hacks permit this but understand this bios was primarily for STE boards which I am still waiting to find in Australia. Is there any benefit in doing this?
Hmm, I hadn't noticed that the V2.3 booster mentions TOS 2.06 (My head has been in STEs of late). I have a PAK 68020 accelerator board that plugs in like the v2.3 and uses TOS 2.06, so I expect it should be possible to run this booster with TOS 2.06 too, but exxos can confirm :)
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...
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exxos
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Re: Rev C070859-001 Rev2.0 Australia 1989

Post by exxos »

krisfeigl wrote: Thu Feb 21, 2019 10:39 am I might order the v2.3 accelerator and the 1.02/1.04 2 chip rom board [0131] to suit now. I am puzzled about the 1.04/2.06 bios option [0050]. Does the v2.3 accelerator which is conditional for this hack permit 2.06 on an stfm. I know complex hacks permit this but understand this bios was primarily for STE boards which I am still waiting to find in Australia. Is there any benefit in doing this?
The V2.X series supports TOS104 & TOS206 such as item 0050. TOS206 has much nicer desktop usage, but isn't good for games. It depends what you want to do...

krisfeigl wrote: Thu Feb 21, 2019 10:39 am If you want a guinea pig let me know for that new SIMM ram expansion to replace the [0020] board as I need a worthy STFM to connect to my Ultrasatan.
Will do. It's not much different than the simm board, only it does not use the simm any more, it will use 2 SMT DRAMs (which are the same ones I use in the MMU kit version).

https://www.exxosforum.co.uk/atari/store2/#0035
krisfeigl wrote: Thu Feb 21, 2019 10:39 am I own a PC shop and have purchased surface mount hot air reflow equipment and desoldering vacuum gun so might be a good candidate to try this out. This STFM board was being kept for spares but might become my main unit if all goes well. I guess I may as well get the blitter socket kit too in the vain hope that I can pickup a Blitter chip some time into the future.
If you can solder it yourself, I may put a couple of kits in my store.. It will probably be a while before I get chance to build one anyway.. But I do have a test machine from the previous board testing these out eventually..
https://www.exxosforum.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxosforum.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.
viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
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People should find solutions to problems, not find problems with solutions.
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Re: Rev C070859-001 Rev2.0 Australia 1989

Post by exxos »

rubber_jonnie wrote: Thu Feb 21, 2019 11:24 am
Hmm, I hadn't noticed that the V2.3 booster mentions TOS 2.06 ...., so I expect it should be possible to run this booster with TOS 2.06 too, but exxos can confirm :)
It will work with TOS1.00, 1.02,1.04, 1.62,2.06 etc but Generally TOS104 & TOS206 are the best ones overall..

It could actually have a TOS102 & TOS104 , but really I think there is little point in that combination.
https://www.exxosforum.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxosforum.co.uk/atari/store2/ - All my hardware mods for sale - Please help support by making a purchase.
viewtopic.php?f=17&t=1585 Have you done the Mandatory Fixes ?
Just because a lot of people agree on something, doesn't make it a fact. ~exxos ~
People should find solutions to problems, not find problems with solutions.
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