Author Topic: Reliable source of 1 Mb SRAM PCMCIA card ? Or any hardware emulator ?  (Read 497 times)

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Offline genesis8

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Hello,
do you know any reliable source of new type I PCMCIA SRAM card 3,3 mm (as seen in this forum) for any notepad ? I can see industrial vendors which seems to sell this (even with 2 included batteries, one replaceable, the other isnt but can keep the data when you change the replaceable one), but no thickness information.

Or maybe a hardware emulator ?
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Offline Bryce

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These are getting very hard to find and stupidly expensive ( I've seen them on offer for >€80! ). I think I may still have a 2MB version somewhere if you are interested.

For information: ALL Type I should be 3.3mm, Type II are 5mm.


Bryce.

Offline pelrun

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http://www.best-electronics-ca.com/portfoli.htm claims to have 1MB cards explicitly compatible with the NC100 for US$15.

2MB will *sort* of work, but the A21 line in the NC100 is floating, which will cause all sorts of weird corruption issues as the card flips between the two 1MB banks are random. Not sure how the NC200 is set up. Eventually I soldered a wire from A21 to ground, which forces the notepad to only use the low 1MB.

Offline LambdaMikel

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http://www.best-electronics-ca.com/portfoli.htm claims to have 1MB cards explicitly compatible with the NC100 for US$15.



I got mine from Best Electronics (Bradley) as well. I didn't do much with the NC100 yet, but the card works fine for CP/M and such. I can testify that.




Offline Bryce

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http://www.best-electronics-ca.com/portfoli.htm claims to have 1MB cards explicitly compatible with the NC100 for US$15.

2MB will *sort* of work, but the A21 line in the NC100 is floating, which will cause all sorts of weird corruption issues as the card flips between the two 1MB banks are random. Not sure how the NC200 is set up. Eventually I soldered a wire from A21 to ground, which forces the notepad to only use the low 1MB.

Learnt something new :) I don't have an NC100, only any NC200 which can handle 2MB without issues.

Bryce.

Offline GUNHED

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Learnt something new :) I don't have an NC100, only any NC200 which can handle 2MB without issues.

Bryce.


That would be nice, but the NC200 also only works up to 1 MB.
http://futureos.de --> Get the revolutionary FutureOS (Recent update: 2019.01.14)
http://futureos.cpc-live.com/files/LambdaSpeak_RSX_by_TFM.zip --> Get the RSX-ROM for LambdaSpeak :-) (Updated: 2019.07.15)

Offline Bryce

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That would be nice, but the NC200 also only works up to 1 MB.

Possibly, but it obviously has A21 tied low or high because the card works reliably.

Bryce.

Offline genesis8

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I ordered 2 cards from best electronics.
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Offline GUNHED

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Possibly, but it obviously has A21 tied low or high because the card works reliably.

Bryce.


Not in my case. Maybe there was an update of the PCB at some point. If I use a 2 MB card, it will fail very soon. Even formatting of the card raised problems.
http://futureos.de --> Get the revolutionary FutureOS (Recent update: 2019.01.14)
http://futureos.cpc-live.com/files/LambdaSpeak_RSX_by_TFM.zip --> Get the RSX-ROM for LambdaSpeak :-) (Updated: 2019.07.15)

Offline Bryce

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Hmm, maybe I modded it and have forgotten??

Bryce.

Offline Munchausen

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Some years ago I installed a switch to so you can select which half of a 2 MB card to use: http://www.cpcwiki.eu/forum/nc100-nc200-pcw-pda600/nc100-and-1mb-memory-cards/


From my post, it looks as though it is A20 (i.e. the 21st address line counting from A0, so that 2^21 = 2MB) that is floating, rather than A21.
« Last Edit: 23:26, 04 June 19 by Munchausen »

Offline pelrun

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I was reciting from memory, so not surprised if I'm off by one :)