I am using Intronics Pocket programmer to program chips and I can't figure out how to erase the 29C256 prom to reprogram it. When I select the chip from the menu it comes up as a 5V Flash prom and there no erase button appears. When I try to program the chip, the the message, "Device is not erased" appears. BTW, I am using the Windows version software.
Thanks for any help on this.

 

Try filling the buffer with "FF"'s. Then program the chip with the "FF" filled buffer. This should erase it.

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TABLE SAWS SUCK!!

[This message has been edited by 93ND500 (edited October 20, 2001).]

 

The software should not care if the chip is erased. It erases it "on the fly" when you program it. Are you sure you're selecting an Atmel 29C256 5V chip ? It's towards the bottom of the list of chips under Flash Proms.

 

Get the latest version of the pocket programmer software for windows , I was having no end of problems getting a 90% failure rate until I upgraded now I am getting less than 2% failure rate - same chips.
I havent needed to fill the buffer with FF's just the binary file and program.

 

New problem, I am using the $32B code and i'm having problems reading the file once I try to open it in Tunercat. The error message says, I need to get the $32 definition code. Well, how do I only program only 16K and not the full 32K of the chip?
Thanks.

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you'll want to program the 16k bin file to the upper half of the eprom(mem address 4000-7FFF)