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Timeline for Spectrum DIY upgrade to 48K

Current License: CC BY-SA 4.0

12 events
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Jan 11 at 9:11 comment added krueger I know my father did this upgrade on our 16k version. I'm not sure but I think there was some kind of soldering needed to connect a couple of pins or something of that nature.
Jan 3 at 22:49 vote accept rwallace
Jan 3 at 21:55 comment added Greenonline There might not be any empty IC slots: "There is anecdotal evidence that 48K machines that failed factory testing with faulty upper RAM were packaged and sold as 16K models. Open the machine up to check first – if the upper RAM is present and not socketed, then a repair of the faulty RAM is more appropriate, and will be covered in another article." - Source Upgrading a 16K Spectrum to 48K. What isn't clear is whether an external RAM pack would work, in this case. Would it "switch out" or "page out" the bad 32k RAM?
Jan 3 at 21:19 answer added Greenonline timeline score: 8
Jan 3 at 19:07 history edited Tommy CC BY-SA 4.0
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Jan 3 at 17:08 comment added SeanC If you look back at the advertisements of that time, you would see many adverts for those chips. I purchased mine for £24.95, installed it myself, and marvelled at the difference in the simulated speech in Meteor Storm (Incomprehensible with 16K, clear in 48K)
Jan 3 at 16:42 answer added Greenonline timeline score: 3
Jan 3 at 15:59 answer added Reinder timeline score: 3
Jan 3 at 13:48 answer added Clive Davies timeline score: 5
Jan 3 at 11:10 history became hot network question
Jan 3 at 10:41 answer added chthon timeline score: 6
Jan 3 at 0:48 history asked rwallace CC BY-SA 4.0