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So to wrap things up: I cleaned the solder mask from the PCB's extra traces and soldered in the 1Mb SRAM with no special trace cutting or rewiring and all is working fine. Hopefully this proves useful for others having the same questions.

Thank you for the input. I just spent some time looking up and comparing SRAM datasheets as well as doing some pinout tracing on the SHVC-1L5B-20. The notes I've taken so far are in the attached image. Everything seems to correlate to what you've said, but I see one inconsistency. The 1Mb SRAM datas...

Hello, I'm looking to convert the 256 kbit SRAM on a SHVC-1L5B-20 PCB to 1 Mbit SRAM and am looking for some direction. When comparing chip pinouts, I see the 256Kb is 28 pins while the 1Mb is 32 pins. I also see that pin 28 of the 256 (VCC) conflicts with pin 30 of the 1Mb (CE2). Does that mean I s...

Hello, For motivation here's a pic of my working copy of Parallel Worlds. I get an odd feeling of satisfaction from the added heft of all the ceramic. Seriously, I do. https://1drv.ms/u/s!Ai7i2Zb7KN5rs2BYHRHuJKrHtkYg?e=YBYIK7 It uses two 27C801's with a MAD-1. Unfortunately I can't help you with you...