Have a look at this first. A well versed and interesting video on the subject. Something I was planning to do. But maybe not now…
Those interested in adding the real-time circuitry to their A1200 Mobos.
- Thread starter Boing-ball
- Start date
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StirlingAmigaII
New member
Yeah I watched that earlier today, good video!
Was interesting that the initial IC footprint on the mobo seemed to be wrong, including 2 connector points that aren't even used.
Wonder if that was why Commodore ultimately decided against factory-installing the RTC.
Was interesting that the initial IC footprint on the mobo seemed to be wrong, including 2 connector points that aren't even used.
Wonder if that was why Commodore ultimately decided against factory-installing the RTC.
I can only thank Commodore for having spared us the Varta of death.
Yep. Looking at the outline, it would have been a big VARTA battery as well.
cloverskull
Active member
Interesting. So the A1200 was initially provisioned for an RTC as well as an FPU but was never actually utilized/installed. I wonder why.
Isn’t it obvious? Cost cutting by Commodore. Don’t forget by the time the A1200 and A4000 were released, Commodore were losing money. The CD32 was the last Hail Mary for them before going bankrupt.
StirlingAmigaII
New member
Well at least they stuck with 2MB RAM and didn't cut that back.
Nah they did it to the A600 instead
Maybe we have to thank to the guy who made a mistake on the pin count and put 20 vs 18 as the chip is noted to have in the video, and this made Commodore not able to do the clock?
Usual Commodore motive - CR
In this case thankfully for us and all the 1200s out there CR stands for Corrosion Reduction.
...I did come across a 1200 where someone tried to add a FPU to the board and then removed it. Sharing below because it was some new info to me, so perhaps it's useful to someone else.
A1200 FPU Upgrade (Onboard) - RetroPassion Ltd
A1200 FPU Upgrade (Onboard) adds an one directly to the A1200 motherboard. Perfect for a stock A1200 or one with an accelerator without FPU option*
www.retropassion.co.uk
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