Unused NOS Dynamic RAMs MHB, produced by Tesla, Czech Republic. Upward Pin Compatible with (16K Dynamic RAM). The price is for one IC (1 . Buy NTE ELECTRONICS NTE online at Newark element Buy your NTE from an authorized NTE ELECTRONICS distributor. TMS DRAM are available at Mouser Electronics. Mouser offers inventory, pricing, & datasheets for TMS DRAM.

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With the help of the cross reference table one can see the classifications of each of the producers for RAM chips. Select a forum I was thinking that FSMC might do it by reading answers to SRAM addressing questions if I assume it were possible to introduce enough wait states but I’m finding it hard to locate the documentation on this. From there, the columns are multiplexed down to one bit using the column address, and that’s the data bit output by the chip.

Any ideas on how to achieve this would be helpful to get me started.

I have an idea I’d like to pursue and partly because of their speed and partly because I’d like to begin ARM development I think a Cortex based board might be a good fit. As I’ve had a couple of requests for more information I will add some more detail.

Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies. Tue Jul 08, Home Questions Tags Users Unanswered. Mon Jul 07, 3: Eight dfam chips in a row provide an 8-bit data bus and 64K bytes of memory.


The RAM in question is dynamic and is refreshed by another system so this would purely be bit addressing with an 8-bit data bus. Sign up or log in Sign up using Google.

org • View topic – dram refreshing!

As also today with the PCyou have to not drram choose the appropriate memory size, but you also have to know where the limit for the access time is. Although they are electrically and mechanically identical, every producer has his own system to mark the RAM chips. Along the bottom of the matrix are sense amplifiers which turn the slightly higher or lower voltage into a definite high or low signal, which is then fed back into each capacitor in a row to fully charge or discharge it again.

Post as a guest Name. Along each row are capacitors, with transistors to connect the capacitors to the columns when the row line is asserted.

This mod will make the chip look just like a ’64 chip to the system. On the Commodore 64, the video chip took care of it automatically, and so refresh was completely invisible to the processor. You have to solder a short piece of wire between pins 1 and 16 of drma chip these are the pins just left and right of the alignment notch on the chip.


Note I am not attempting to design a based circuit with drams! Are you trying to monitor or share data with the other system?

MHB4164 Tesla 4164 64k X 1 Dram Dynamic RAM

Ok so I am referring to this website: The memory is constructed from DRAM chips of varying speeds the slowest of which are ns parts hence the requirement.

In other languages Deutsch. The chips of computers, which are used as temporary memory, are called RAM. Simply put, if the row address on the DRAM is connected to the lower eight bits of the system’s address bus, then the system simply needs to periodically read the dramm bytes of memory to refresh the entire 64K.

At that point, the whole row is refreshed. Page 1 of 1. Previous topic Next topic.

For clarification I want to perform DMA to a vintage microcomputer. I have done quite a bit of Arduino projects previously. Retrieved from ” https: Users browsing this forum: If you need one of the chips, you can also use a 464. Next, there are often one or more letters, which most stand for the housing shape.