### Micro.Blog (Patrick H. Mullins)
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[Back] - Date: 2019-07-13 @ 10:00 AM EDT by PHM / It's dead, Jim.

There's definitely something going on with the accelerator that I installed in my new Amiga 500. I ended up pulling both the compact flash adapter and the 8 MB stick of RAM from the card in order to test it. After everything was removed I restarted the system and was greeted with a bight, red expansion board diagnostic screen that listed my card as being defective. Hmmm, that's interesting. However, the entire accelerator card can't be all bad seeing as how I just booted to a working AmigaDOS screen using nothing but the CPU on the Wicher 500i.

I can, once the AmigaDOS screen loads, verify that the processor installed on the accelerator card is working with the `cpu` command. Additionally, when I attach just the compact flash drive to the accelerator, the system will see the CF card, and it will attempt to boot AmigaOS from it. However, it fails to load properly due to the fact that my A500 only has 512 KB of chip RAM and AmigaOS v3.1.4 (installed on the CF card) requires a minimum of 2 MB of RAM to even boot. Okay, so the processor is still working and the system can see the CF card. It's time to move on to the 8 MB stick of EDO RAM installed on the accelerator.

I snapped the stick of memory back into the RAM slot on the Wicher 500i, rebooted the A500, and was greeted with the red screen of death. I then removed the memory from the card, rebooted the system, and watched as it once again booted to a working AmigaDOS screen. I think we've found our culprit. It has to be a defective stick of RAM, right? Well, I can't say for sure. I am unable to verify my theory due to the fact that I don't have a spare 72-pin EDO SIMM to test it with.

You would think, considering the sheer number of electronic devices that I have in my home office and lab, that I would be able to find a usable stick of RAM, right? I looked in every nook and cranny where I might have stashed a stick of memory and came up empty. It looks like I'll have to either order a new stick of RAM or wait for someone that I know personally to bring one to me for testing. Unfortunately, that might take some time.