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’m still not getting this: I checked the Cromemco Bytesaver schematics and there e;rom a pull-down resistor on this pin. The Bytesaver card only uses eproms, but I’ve managed to create a socket adapter to use ‘s instead. Either way – you may find some manufacturer’s devices may not work i. But this didn’t seem to work. Poi si deve collegare il pin Not Chip Select 20 ed il pin di programmazione 18 a massa.
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So, the pin 22that in the is the perom address line, in the is a ground. It’s not what we’re saying, it’s what the respective datasheets specify. Sorry, your blog cannot share posts by email.
In my reasearch I’ve read that ‘s are pin compatible with ‘s so I figured I could use the same adapter with ‘s.
To read a eprom we need 10 output for the address epro, and 8 input for the data bus: Where would I connect these three pins on the or ? Every byte is separated by a space character. Moreover, we need a way to transmit data to a PC, so we need other two pin for a serial port. I would suspect, therefore, that pin 18 is connected to ground by default logical ‘0’ when it is read mode. 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 The pinouts and voltages are drastically different.
What I also tried was to use eeproms. Whilst you say your adapter works and I am not disputing this the datasheet states that pin 21 VPP should be connected to VCC for correct read operation.
I am still a bit confused by your pin Results 1 to 10 of I’ve also loaded the Altair Rom written by John Garza which enables deposit and examine of memory from a terminal, as well as the 4k Basic loader and a few other great features. I’d put the ZIF socket on the Bytesaver; plug in aor the adapter with a in it. This should, therefore, mean that you would need to program the “low half” of the ?
I have a 2k monitor program in the top 1k of fprom ‘s, in two sockets each with an adapter, and the epro, runs as 2k of continuous memory.
The software suite is divided in two pieces: Circuit To read a eprom we need 10 output for the address bus, and 8 input for the data bus: I still don’t get how you expect one adapter to suit s and s? Thread Tools Show Printable Version.
Pin 21 of the is Vpp which should be wired to pin 24 Vcc for normal operation. I would also break out pin Elrom data bus is 8 bit, so we can directly connect the bus data to one port of the PIC. Originally Posted by MikeS.
(EPROM) NTE Equivalent NTE INTEGRATED CIRCUIT E – Wholesale Electronics
Q7 il dato letto. We are in the 270 of creating the burning part needed in our circuit board, the PIC software and the corrispondent burning utility in Python. I am not sure what the other logic does on this pin as I only located a partial schematic.
Facebook Twitter Google Email Print. I’ve got an 8k Bytesaver card in my machine which I’ve loaded up with the 8k Basic bootloader. And I’ve used the Top programmer to program the ‘s on the pc, this works fine. Pinout eprim the same but the address bus, that is 9 bit instead of We’ll assume you’re ok with this, but you can opt-out if you wish.
All times are GMT 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. Anyone know why this would be? I’ll make up and adapter with you suggestion and try it out. Page 1 of 3 1 2 3 Last Jump to page: The time now is Isn’t that what the adapter plugs into?
Data is trasmitted to the serial port as an ASCII character, representing the hexadecimal value that has been read. Monday September 10th, Tuesday August 5th, admin.
File:2708 EPROM installed in Cromemco Bytesaver.jpg
All this means is that your will not enter standby mode i. Bookmarks Bookmarks Digg del. I have to agree with everything Dave says.