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Back to forum Reply to this topic Go to last reply Posted By KLund1 on 2016-06-25 21:47:15  Need replacement 7501R1 for ailing plus/4 Anyone know where i might buy a 7501r1 IC for my dead P/4's. I has two P/4 and swapped IC's until I found the bad one. and it was this one. Links, posts, suggestions? many thanks Posted By KLund1 on 2016-06-25 21:51:30  Re: Need replacement 7501R1 for ailing plus/4 Sorry edit above The 7501 was in the IC that was causing the problem The good IC was a 8501R1 So I need an 8501R1 Thanks Posted By gerliczer on 2016-06-26 01:48:40  Re: Need replacement 7501R1 for ailing plus/4 The two types are functionally equivalent, doesn't matter which is in the computer. They may differ in probable resilience only. Back to top Reply to this topic Copyright © Plus/4 World Team, 2001-2025. Support Plus/4 World on Patreon