https://www.ebay.com/itm/CY62167DV30LL-55ZXI-16Mbit-1Mx16-Static-RAM-55ns-TSOP48/271833602209?hash=item3f4a8b98a1:g:I3QAAOSwEyhZ3e6x
interestingly here is a fairly affordable 2MB SRAM - CY62167 - that I would think is compatible with this design. 7$+ shipping. On Thu, Nov 23, 2017 at 7:50 AM, Stephen Adolph <[email protected]> wrote: > BOM: > > XCR3064XL-10VQ44 > TC55VBM416AFTN > (2) SN74LVC4245 > LP2980-3.3 > TPS78233 > BAV70 > (2) 10k 0805 > (2) 1uF 0805 > > [image: Inline image 2][image: Inline image 1] > > On Thu, Nov 23, 2017 at 7:44 AM, Stephen Adolph <[email protected]> > wrote: > >> Mike, I have not really thought about it. I just submitted a V2 board >> that cleans up the barnacles needed on V1, and once that is confirmed good >> in about 3 weeks, I was thinking just to post all the info so it can be >> built by anyone, like REX. >> >> The BOM cost is quite a bit higher. The CPLD is 5$ and the 2MB SRAM is >> around 15$ - 30$. Large SRAM is not cheap. >> >> I designed it to use either 1 or 2MB 3.3V 8x / 16x SRAM. I have about >> 100 SRAM chips between the following parts list on hand, so I designed >> around them. >> >> CY62157EV30LL-45ZXI TSOP-48 3.3V 1MBx8 512Kx16 SRAM >> TC55VBM416AFTN-55 TSOP-48 3.3V 2MBx8 1MBx16 SRAM (used in ReMem) >> TC55W800FT-55 TSOP-48 3.3V 1MBx8 512Kx16 SRAM >> >> >> Still, REXCPM is much easier to build and install than ReMem, so it is a >> good step forward for CP/M. >> >> >> >>> >>> On Wed, Nov 22, 2017 at 7:47 PM, Mike Stein <[email protected]> wrote: >>> >>>> Sounds great! >>>> >>>> Any rough idea of a price point? >>>> >>>> m >>>> >>> >> >
