Help identify the mods on this MEGA

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spiny
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Help identify the mods on this MEGA

Postby spiny » Sun Aug 19, 2018 4:31 pm

Hi All,

I got given this MEGA board this week and I'd like some help with working out what it has had done, as there are a load of mods on it :)

Some of the mods seem incomplete, and some are unplugged, and some have wires that appear to have come loose since it's been in storage.

There is a note with it thats dated 1998, so I assume its been untouched since then. Help reading the note would be good as well, my German skills are poor to say the least.

anyway, heres a ton of pics, I've tried to centre the mods in each pic, but I can take more photos if it'll help.

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spiny
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Re: Help identify the mods on this MEGA

Postby spiny » Sun Aug 19, 2018 4:32 pm

The board with three chips on it has connectors that look like they will connect to the 'sockets' that are addedd to the RAS area resistors.

Almerian
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Re: Help identify the mods on this MEGA

Postby Almerian » Sun Aug 19, 2018 5:32 pm

It looks like a memory expansion has been fitted.
Also, looks like a 1.44 Mb floppy mod.

No ROM, processor or shifter.

The note says something like:
DMA capable.
No additional circuit
(followed by something illegible, perhaps ist=is/was)
tested with additional circuit on 17-06-98

czietz
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Re: Help identify the mods on this MEGA

Postby czietz » Sun Aug 19, 2018 6:06 pm

Almerian wrote:DMA capable.
No additional circuit
(followed by something illegible, perhaps ist=is/was)
tested with additional circuit on 17-06-98


I read "keine Zusatzschaltung erf.", where "erf." probably means "erforderlich" = required. Hence: No additional circuit required.

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Re: Help identify the mods on this MEGA

Postby Almerian » Sun Aug 19, 2018 9:58 pm

czietz wrote:
I read "keine Zusatzschaltung erf.", where "erf." probably means "erforderlich" = required. Hence: No additional circuit required.

Yes, that's it.

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Re: Help identify the mods on this MEGA

Postby spiny » Sun Aug 19, 2018 10:01 pm

cheers guys :)

any ideas on the other smaller mods? like the jumpers in various locations ?

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Re: Help identify the mods on this MEGA

Postby derkom » Mon Aug 20, 2018 6:33 am

The connector added in 08 looks like it's just to power a fan.


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