2708 EPROM PDF

The restoration of computers like our SAGA FOX LS, containing an EPROM , gave us the necessity of reading, and so storing, the. , , , , , , 27C, , 27C, , 27C, 27C, , , EPROM series. EPROM and CMOS. The Bytesaver card only uses eproms, but I’ve managed to create a socket adapter to use ‘s instead. And I’ve used the Top

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I can program the ‘s using the Top, that works fine, but when Eprm use them in the Bytesaver, the Altair doesn’t read them. Please write us about any error, missing part or comments! The data bus is 8 bit, so we can directly connect the bus data to one port of the PIC.

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Originally Posted by daver2. PCB board layout and circuit schematics.

What I also tried was to use eeproms. Serial port to be used on the PC, speed and connection parameters, the number of readings and the file name to save the dump can be changed editing the header of the Python code.

Perhaps there are some which ignore this pin – or it is a “no connect” pin. We are in the process of creating the burning part needed in our circuit board, the PIC software and the corrispondent burning utility in Python. I have to agree with everything Dave says. Forum Genres S eprom substitution, Bookmarks Bookmarks Digg del. Anyone know why this would be?

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All times are GMT Isn’t that what the adapter plugs into? As I said I will try Dave’s suggested wiring and post results I expect it will work better. I appreciate the input and don’t get me wrong I accept what you guys are saying.

Originally Posted by MikeS. Data is eorom to the serial port as an ASCII character, representing the fprom value that has been read. Either way – you may find some manufacturer’s devices may not work i. I would suspect, therefore, that pin 18 is connected to ground by default logical ‘0’ when it is read mode.

Where would I connect these three pins on the or ? Facebook Twitter Google Email Print. So, the pin 22that in the is the 9th address line, in the is a ground. I’m still not getting this: I did the hack in a socket between the card and chip. The software suite is divided in two pieces: Q7 il dato letto. I am still a bit confused by your pin I’d put the ZIF socket on the Bytesaver; plug in aor the adapter with a in it.

File:Intel 2708 EPROM.jpg

Poi si deve collegare il pin Not Chip Select 20 ed il pin di programmazione 18 a massa. Every byte is separated by a space character. We need to wait the correct time for the data to be burned about 1 ms according to the datasheet and put back to ground the programming pin In my reasearch I’ve read that ‘s are pin compatible with ‘s so I figured I could use the same adapter with ‘s.

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So it seems the adapter as I originally wired it only works for ‘s. The Bytesaver card only uses eproms, but I’ve managed to create a socket adapter to use ‘s instead.

I would also break out pin And I’ve used the Top eprmo to program the ‘s on the pc, this works fine. I tried reading a in the adapter and that didn’t work.

Hi, The other confusing thing is that you say you program the “high half” of the – but pin 19 A10 is linked to ground. Page 1 of 3 1 2 3 Last Jump to page: Professional tools that can do this task are really expensive.

Pinout is the same but the address bus, that is 9 bit instead of To read a eprom we need 10 output for the address bus, and 8 input for the data bus: This should, therefore, mean that you would need to program the “low half” of the ?

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