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Sakura-IT / ppa-pcmcia-sram

PCMCIA SRAM card project (Sakura)
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Non-attribute memory SRAM cards #1

Closed toastedcrumpets closed 6 years ago

toastedcrumpets commented 6 years ago

Hi! Thanks for this amazing project. I'm currently looking for SRAM cards for old test equipment (in particular LeCroy 9300 series scopes). They require non-attribute memory PCMCIA SRAM cards, do you have any advice on how the CPLD VHDL might need to be modified to remove the CIS/attribute memory? Kind regards, Marcus

rkujawa commented 6 years ago

Hi.

That should be relatively straightforward. Minimal modification removing attribute memory, would require changing ce_attr_internal to always be in an inactive state (1, since it's active low).

I.e. change lines 107-109 of main.vhd to:

ce_attr_internal <= '1';

This will essentially disable decoding of attribute ROM.

toastedcrumpets commented 6 years ago

Thanks that's really simple. Do you still sell these via http://retroami.com.pl/? There's a number of people who might be interested in buying them over at the LeCroy users group if they work, but I'd like to test one first if I can.

rkujawa commented 6 years ago

The cards are out of stock and for the time being, I am not planning a new production run (due to personal issues). So most likely you will need to make your own card. I am aware of quite a few people who have already done homebrew production of these cards.

Please note that the cards were not tested in anything but Amiga computers. They are also physically shorter than normal PCMCIA cards, so depending on the slot in your LeCroy scope, it might be necessary to adjust the PCB design. Also see issue #2.

toastedcrumpets commented 6 years ago

Ah no problem, I hope your personal issues are swiftly resolved and thank you again for putting this together. I've seen that the Xilinx part for the v2.1 are out of production, but the v2.2 uses a BGA part which I've never soldered before, so I might try a 2mb card from ebay first before I try building my own!

rkujawa commented 6 years ago

@toastedcrumpets You can use XC9536XL-10VQG44C in v2.1, this is still in production.

toastedcrumpets commented 6 years ago

Thanks, I've ordered an SRAM from Ebay for now, but I don't doubt we might start making these if more scopes come in!

Kobbe1 commented 4 months ago

@toastedcrumpets sorry for resurrecting this but I am looking for an PCMCIA card for an old LeCroy scope too as it seems to have lost it's firmware, bit difficult to get my hands on one these days, so was wondering if you ever got this PCB built?

toastedcrumpets commented 4 months ago

Hey @Kobbe1, sorry no I didn't try it as I only needed the one card. If there's demand and no alternative source I could do a manufacturing run of these if needed with the vhdl changed, but I'm not planning this myself at the current time