Amiga 500 AdRAM 540 1.5MB trapdoor memory For Sale

Amiga 500 AdRAM 540 1.5MB trapdoor memory
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Amiga 500 AdRAM 540 1.5MB trapdoor memory:
$45.00

Amiga 500 AdRAM 540 1.5MB trapdoor memory. Includes the needed GARY adapter. Please note, when installed in an A500, using Amiga Test Kit it showed a memory error, but when using AdRAM's own utility and Advanced Amiga Analyzer didn't find any problems. It may be Amiga Test Kit doesn't test well with this particular adapter but honestly I am not sure but is being sold as-is. Here is some info on the board from Amiga Resources:
  • 32 DIP sockets accept 4 MB RAM (AdRAM 540) - Note, 1.5mb populated
  • supports 256k×4 (414256), 70 - 120 ns DIPs
  • accepts DIPs in groups of four giving 0.5, 1, 1.5, 2, 2.5, 3, 3.5, 4 MB configurations
  • expandable to 6 MB with the optional AdRAM 560 board (not included)
  • only 4 MB of 6 is continuous
  • only 2.5 MB RAM is autoconfigured
  • the 1.5 MB option does not work properly with Kickstart 1.2 when the RAM chips are installed in the first three banks
    • install one megabyte in the first two blocks (those get automatically recognized) and install the rest of the chips in one of the last four blocks (those will be recognized by the AdRAM program)
  • no disable switch
  • battery backed up clock
  • the RAM board connects to the trapdoor slot
  • the adapter board connects to Gary's socket - if 1 MB Chip RAM is present, a wire has to be soldered between the adaptor and the motherboard
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Documentation