i want to buy some cache chips for my 486 boards, that is, 128k*8 sram chips and 32k*8 tag chips. can someone give me some common model numbers so i can search for them?
for example, one board comes with 4 umc um61512ak-15 sram chips, which are 64k*8. and tagram is alliance as7c3256-15pc, which is 32k*8.
ISSI IS61C1024 seems to be the most readily available 128k*8 chip, mostly 15ns binning (the suffix for the DIP type you want is -N, IS61C1024-15N). Winbond W24257AK is a decent 32k*8, 10ns available.
i need to necro this thread because i want some more tag ram chip models. while i have bought some W24257AK-15 tag chips, now i want some faster ones(-12 or -10) and they are less plentiful to find, and when i find some i kept wondering whether they are remarked from slower models(they are all laser engraved, while -15 ones are white painted).
TAG is just a function not a chip. You can use any SRAM chip as long it's the right capacity and speed. If it's slow it will still work but with more wait states.
Requests are also possible... /msg kixs
As long as the TAG socket is long enough, you can use the same chips you got for the banks. The extra memory just goes unused.
wrote:TAG is just a function not a chip. You can use any SRAM chip as long it's the right capacity and speed. If it's slow it will still work but with more wait states.
okay then, can you guyz give me some common 32kb*8 sram models so i can search for them?
Requests are also possible... /msg kixs
