Quote:
Originally Posted by Retrogradient
I was reading about replacement parts on Rev 6.2 (More specifically referencing the Bill of Materials for a replica rebuild) and it called for 4256-10NL parts
539 U501 4256-10 Top Memory chip
540 U502 4256-10 Top Memory chip
541 U503 4256-10 Top Memory chip
542 U504 4256-10 Top Memory chip
543 U505 4256-10 Top Memory chip
544 U506 4256-10 Top Memory chip
545 U507 4256-10 Top Memory chip
546 U508 4256-10 Top Memory chip
Considering the replica boards are Rev 6.2...
Shouldn't these be 44C256-15 / 44C256-10 than ???
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Maybe. Depends on the manufacturer. Many (not all) manufacturers designate their 256k x 4 DRAM with a part number
containing or ending with 4256-xx. Where the xx is the speed of the DRAM. The bill of materials is simply telling you to look for 4256-10 in the part number. However, it does not have to be -10. The Amiga 2000 Rev 6 specs call for 150ns (-15) or faster. I have been using 70ns DRAMS (-70) to replace the stock ones when needed.
See this link for some compatible DRAM options.
http://www.amiga-stuff.com/hardware/256kx4-dram.html