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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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Poi si deve collegare il pin Not Chip Select 20 ed il pin di programmazione 18 a massa.

I think the key is pin 21 on thethis pin doesn’t affect reading on thebut the way I have it wired would stop reading on the Circuit To read a eprom we need 10 output for the address bus, and 8 input for the data bus: The other confusing thing is that 2078 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: And I’ve used the Top programmer to program the ‘s on the pc, this works fine.

EPROMS , , , , , , ,

I still don’t get how you 278 one adapter to suit s and s? Dave, Thanks for the info, my current adapter is working. Thread Tools Show Printable Version. The pinouts and voltages are drastically different.


2708 / 2704 EPROM reader / programmer

Q7 il dato letto. Pin 19 of both the and is address line A10 so you can wire this to ground pin 12 to use the first half of the device or pin 24 Vcc to use the second half of the device. It’s not what we’re saying, it’s what the respective datasheets specify. The software suite is divided in two pieces: As I said I will try Dave’s suggested wiring and post results I expect it will work better.

Originally Posted by MikeS. Every byte is separated by a space character.

But this didn’t seem to work. Forum Genres S eprom substitution, 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 I appreciate the input and don’t get me wrong I accept what you guys are saying. I am still a bit confused by your pin Originally Posted by daver2. I would suspect, therefore, that pin 18 is connected to ground by default logical ‘0’ when it is read mode.


Isn’t that what the adapter plugs into? Originally Posted by kingchops. I’m still not epro this: Perhaps there are some which ignore this pin – or it is a “no connect” pin.

(EPROM) NTE Equivalent NTE INTEGRATED CIRCUIT E – Wholesale Electronics

Hi, The other confusing thing is that you say you program the “high half” of the – but pin 19 A10 is linked to ground. Monday September 10th, Tuesday August 5th, admin. I would also break out pin Moreover, we need a way to transmit data to a PC, so we need other two pin for a serial port.

Where would I connect these three pins on the or ? Anyone know why this would be?

I tried reading a in the adapter and that didn’t work. We’ll assume you’re ok with this, but you can opt-out if you wish. PCB board layout and circuit schematics. The time now is Data is trasmitted to the serial port as an ASCII character, representing the hexadecimal value that has been read.