I have recently acquired an Apple IIe that I am in the process of bringing back to life. Currently, it is missing the Video ROM and I plan on burning the rom onto a 2732 eprom chip. When looking at chips to buy I noticed that there are versions of this chip that have different access speeds. For example, the datasheet for TI's TMS2732 shows that it comes in both a 300ns and 450ns versions. I couldn't find what the access time/cycle time version of this chip Apple is usiung for 342-0133-A (unenhanced Video ROM - US version).
I was able to get my hands on an official chip and put it into my ROM programmer to dump/verify and to see if the programmer would give me that information and I wasn't able to make heads or tails. Included in the screenshot I highlight where 2 different values were given for speed neither of which is consistent with eachother or the datasheet that I linked.
So, I have 2 questions:
1 - What speed chip should I choose? Does the access speed matter at all for this application?
2 - How/Where should I have found out the answer to this question. I seem to be missing some very basic conceptualization of the machine and lack the neccessary skills to solve the problem for myself. I have a feeling I will run into this type of problem in the future and don't want to have to resort to asking online for help.