I suspected but was not sure. snip! Tim, funny that you said about 74s89, IN fact I DID used it to store the data on one of my high-school project. Multi choice counter with that feature based on AND to match and make the counter count. I used s192 or s193 not sure to drive that S89. It's 16 x 4bit which is 64bit static memory. The problem was the opamp hooked to that photodiodes and years later found out that 741 is not that good. It seems to steal each other if I try to use it more than 2 sensors. I use 5. Troll

Merch, I went through a DEEP cost basis analysis to get most performance gains on each technologies: EDO, FPM and hd's up to Fast ATA-2, HX with PB 512k gives best bang and no improvement in performance without eating too much $ if using SDRAM with that brain-damaged VX or TX chipset especially only with P5 class. Too many new P5 pc's are selling with 32mb or over installed therefore VX and TX is out. TX make good short term upgrade mobo if spending under 600 bux for hd/mb/mem/cpu/PCI vid package. Best use for SDRAM's Dimm's are for the PPro/P5II with FX/LX440 chipsets, and Ultra ATA hds types. Yes, there's PPro adapter board to plug into Slot 1. That done and put aside...about timings; Note this one: 5-1-1-1 and SDRAM technologies: And I hasten to correct a bit about 10ns part...the first part setting up one address takes exactly as long as normal FPM or EDO does to get data back is between 60-50ns which is why the first few cpu cycles is 5 cycles. Without changing the original address, if cpu needs next instruction at that next address from old one the SDRAM made data available the instant CAS is either on rising or falling the next address location is ready to be read for cpu one cycle later, same thing for next 2 cycles later for getting next 2 datas. Also and along that if there is a page cache hit, it's 10ns. Miss is regular old DRAM performance. The possible total true 0 wait with interlaving banks memory with that fastest available typical FPM or EDO is 45-50ns which is appox less than 25mhz for 486 and below. That is why I insist rather strongly to new buyers to take branded pc's that must have fully configured cache and QUESTION the spec paper if cannot see the featured cache when looking at pcs on display. Ranting of wishful thought snipped! Troll