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PostPosted: Wed Feb 03, 2016 2:06 pm 
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Joined: Sat Nov 03, 2012 12:42 pm
Posts: 18
Location: Germany
Hey there guys!

I'm puzzled.

I'm trying to do a repro of the homebrew Lan Master. It's free to download (do it, it's awesome espcially if you like Pipe Dreams!)

Nevertheless:

I got a NROM-256 as a donor: http://bootgod.dyndns.org:7777/profile.php?id=1470
...and two AT28C256. I used famirom to split and pad the rom file, then wrote the files to the eproms.

Popped them in and - nothing. Mh.

Do I have to rewire something? I thought NROMs can be dropped in.

Famirom has this info about the rom:


Code:
Lan_Master.nes
iNES ver.: 1.0
 platform: NES
   mapper: 0
mirroring: Vertical
 prg size: 32KB (256kb)
 chr size: 8KB (64kb)
  prg ram: not specified
  battery: no
  trained: no
TV system: NTSC (default)
boards: (NROM [NROM])
crc32:
    file [8AF59FF8]
    prg  [68396F0A]
    chr  [E1B0A3AE] :oops:


Anybody out there with an idea? :oops:


Attachments:
File comment: Pinout of 28C256
28C256.gif
28C256.gif [ 2.98 KiB | Viewed 1042 times ]
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PostPosted: Wed Feb 03, 2016 2:12 pm 
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Joined: Sun Apr 13, 2008 11:12 am
Posts: 6513
Location: Seattle
The AT28C256 puts A14 on pin 1 instead of on pin 27, where the cartridge expects it to be, so you'll need to do a tiny bit of rewiring for the PRG.


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PostPosted: Thu Feb 04, 2016 9:45 am 
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Joined: Sat Nov 03, 2012 12:42 pm
Posts: 18
Location: Germany
lidnariq wrote:
The AT28C256 puts A14 on pin 1 instead of on pin 27, where the cartridge expects it to be, so you'll need to do a tiny bit of rewiring for the PRG.


ah, thanks a lot! I tied pin 1 to hole 27 and pin 27 to pin 28 - at both prg and chr, just to be sure. Works fine now!

Thanks again!


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