Where can I have a prom memory chip programmed? What kind of programming form is filled out?
considering your previous post, Microcontroller Programming (http://cs.trains.com/mrr/f/744/t/219323.aspx) why don't you purchase a programmer (~$20) and program it yourself?
what do you mean by form (i.e. paper)? You would provide the data as an electronic file.
greg - Philadelphia & Reading / Reading
Perhaps some more detail? What are you trying to accomplish here, with what sort of equipment?
--Randy
Modeling the Reading Railroad in the 1950's
Visit my web site at www.readingeastpenn.com for construction updates, DCC Info, and more.
Want to program a prom chip 64Kx8, not a microcontroller. Is the data put on paper or into a program file?
Data goes into a program file which is fed to your PROM programmer. You need a PROM programmer to be able to program them.
Randy, Where can I get a program file?
you want the PROM programmed to your specifications, either a program for a specific processor or possibly just data. You would generate the file read by the PROM programmer that is compatible with the programmer.
If you were writing code, the compiler would generate a binary file to be run from memory. That file could be translated into a format for a PROM programmer.
My Prom was so long ago (1968) I can't even remember if there was a program!
NP 2626 "Northern Pacific, really terrific"
Northern Pacific Railway Historical Association: http://www.nprha.org/
If this is just something you are doing - the PROM programmer will accept what are essentially text files with the data in hex You need to write the program you want to burn into the PROM, or if you are using something that already exists, download it in a format suitable for the PROM programmer you are using.
Also if this is an existing chip with something already burned into it, you can't reuse is, unless it is an EPROM or EEPROM. The first is erasable with UV light (which is why they often have a piece of tape over the clear window - sunlight will do it, but it takes years), the second is electrically erasable, the appropriate programmer will be able to erase the existing contents before applying a new file.
Most of the time when people talk about PROMs here they mean the EPROM in the NCE PowerPro, which has had several updates, or the main chip on the QSI decoders.
The memory chip would be a prom, not an eprom. I have written the code-the truth table and need to have it programmed into the prom. I have never done this and would like to know what kind of program to use and how to enter the code. Is there companies that offer programming service?
i wish you would describe what you're trying to do. I'm curious.
One reason for making devices re-programmable (EEPROM) is because developers rarely get things correct the first time. And because of this, it's important that the process of erasing, regenerating the program information, reprogramming a device and being able to retest it can all be done in a reasonable amount of time.
How confident are you that what you've coded is correct?
This is why it makes sense to have your own programmer and erasable devices or use a device that can be reflashed in circuit (e.g. PIC processors).
Greg, i am connecting a counter circuit to the prom and depending on the count the counter inputs to the prom the output of the prom will have a cetain value. Im am confident of the code but if not the memory chips do not cost that much. It can be a prom or a eeprom. How much are programmers for memory chips? Are there companies who offer the service and how much?
it looks like a universal programmer can be found on ebay for ~$50.
a quick google search turned up Advin which I think is what your're asking for.
again, curious, what is the ROM output? numeric display, lights, triggers for other devices?