AM27C400 Failed to program

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ironsniper1
Posts: 40
Joined: Sat Jan 16, 2021 3:47 pm

Re: AM27C400 Failed to program

Post by ironsniper1 »

lidnariq wrote: Tue Apr 20, 2021 4:54 pm Well, what happens if you try to read the next bank of the ROM after you've programmed the first one?
it has some info but most of it is missing
lidnariq
Posts: 11432
Joined: Sun Apr 13, 2008 11:12 am

Re: AM27C400 Failed to program

Post by lidnariq »

Is this still using the special board to program larger ROMs, or are you literally programming a 512KB UVEPROM?
ironsniper1
Posts: 40
Joined: Sat Jan 16, 2021 3:47 pm

Re: AM27C400 Failed to program

Post by ironsniper1 »

lidnariq wrote: Tue Apr 20, 2021 5:06 pm Is this still using the special board to program larger ROMs, or are you literally programming a 512KB UVEPROM?
i have to use an adapter for my programmer making it think i am programming a 27c4096 when i am really programming a 27c400 as my programmer does not support them by default, if there was a way to modify it to support it i would do that
lidnariq
Posts: 11432
Joined: Sun Apr 13, 2008 11:12 am

Re: AM27C400 Failed to program

Post by lidnariq »

So there should be no banks, right?
Markfrizb
Posts: 607
Joined: Sun Dec 02, 2012 8:17 am
Location: East Texas

Re: AM27C400 Failed to program

Post by Markfrizb »

ironsniper1 wrote: Tue Apr 20, 2021 5:36 pm
lidnariq wrote: Tue Apr 20, 2021 5:06 pm Is this still using the special board to program larger ROMs, or are you literally programming a 512KB UVEPROM?
i have to use an adapter for my programmer making it think i am programming a 27c4096 when i am really programming a 27c400 as my programmer does not support them by default, if there was a way to modify it to support it i would do that
It’s been a while since I even thought about a C4096 4mega bit eprom (so I may be wrong)... isn’t it an 8 bit device while the 27c400 is a 16 bit device? Wouldn’t the programming algorithm be very different (at least from the programmers perspective)?
poorstudenthobbyist
Posts: 252
Joined: Fri Jun 24, 2016 4:20 pm

Re: AM27C400 Failed to program

Post by poorstudenthobbyist »

The 4096 is a 16 bit device

He's using a programming adapter like this
ironsniper1
Posts: 40
Joined: Sat Jan 16, 2021 3:47 pm

Re: AM27C400 Failed to program

Post by ironsniper1 »

poorstudenthobbyist wrote: Tue Apr 20, 2021 6:32 pm The 4096 is a 16 bit device

He's using a programming adapter like this
this is the one i use https://www.tindie.com/products/digicoo ... 60-eproms/
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