Hi, sorry for bumping this "old" thread. I have an PS1 (2168 552) that uses the same board that the one epictronics shows in his videos. I'd like to upgrade it but i have some questions. I already asked on the general forum, but no luck 🙁 So I guess is better to ask someone that has this computer:
- My main concern is the cache. I want to upgrade it to the maximum amount. ¿Is there any problem if I use faster chips than specified at the manual? I've looked at ebay for the UM61256ck-20 and they're more expensive than other faster 256kb chips. Should I pay attention to anything in special or go for a specific manufacturer? Maybe UMC is better than ISS? The idea is to install 16MB of RAM, altough may be in the future it gets upgraded to more ram (24 or 32 megs) if the games he plans to play don't have problems with that amount of memory.
-I thought that all overdrive chips were the same, but today I've learned that there are some that come with 169 pins instead of 168 pins, so I guess the cheapest and quickest way to upgrade the cpu is hacking the motherboard because a 168pin overdrive 486, should not disable the onboard 486SX. Am I wrong? (I already tried an ODPR and set the jumpers to 486dx, but it didn't work)
-The motherboard uses an hitachi ram chip for the video card. I guess it'll be better to use the same manufacturer for the ram, but do you know if i can use chips, for example, for siemens as long as they run at the same speed and have a compatible pinout?
Enough of your games Asthar, this is between you and me.