+arcadeshopper Posted October 11, 2016 Share Posted October 11, 2016 I do this mod to Williams arcade boards that use the 4116 ram.. luckily they are all socketed so it's pretty easy.. The 4116 and 4164 chips are nearly identical with two exceptions so if you cut off pin 1, and bend out pin 8, trim and jumper to pin 9 you have a 4116 replacement that uses less power, lower heat and higher reliability. comments? Greg 11 Quote Link to comment Share on other sites More sharing options...
+OLD CS1 Posted October 11, 2016 Share Posted October 11, 2016 I suppose D7 does not care about having VCC (+5V) attached, just makes it logic-high forever, yeah? 3 Quote Link to comment Share on other sites More sharing options...
Tursi Posted October 11, 2016 Share Posted October 11, 2016 Yeah, won't hurt it. Nice hack 2 Quote Link to comment Share on other sites More sharing options...
+OLD CS1 Posted October 11, 2016 Share Posted October 11, 2016 I like it. I was thinking it is a shame to waste 48kb (bits) of memory, but the 4164s are likely much easier to find (and I will be looking to upgrade a couple of Commodore REUs,) and maybe with a little extra logic one could make the VDP's 16k space bank-switchable. 1 Quote Link to comment Share on other sites More sharing options...
+arcadeshopper Posted July 7, 2020 Author Share Posted July 7, 2020 I am now carrying a small pcboard that does all this for you. you mearly solder the 4164 to the board and then solder pin headers to the board for connecting to the motherboard.. easy https://arcadeshopper.com/wp#!/4164-adapter-pcb-for-4116-ram/p/202875952/category=0 2 Quote Link to comment Share on other sites More sharing options...
+arcadeshopper Posted November 20, 2022 Author Share Posted November 20, 2022 On 10/11/2016 at 7:57 AM, arcadeshopper said: I do this mod to Williams arcade boards that use the 4116 ram.. luckily they are all socketed so it's pretty easy.. The 4116 and 4164 chips are nearly identical with two exceptions http://primrosebank.net/computers/mtx/projects/mavram/RAM%20Pinouts.jpg so if you cut off pin 1, and bend out pin 8, trim and jumper to pin 9 you have a 4116 replacement that uses less power, lower heat and higher reliability. http://www.8bit-homecomputermuseum.at/repair/newbrain/small/4116_ram_replace.jpg comments? Greg here's the two pictures again.. either the upgrade or this forum sw sometimes removes photo links Greg 5 Quote Link to comment Share on other sites More sharing options...
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