Post #1647248
2026-04-03 21:08 UTC
Yesterday, I assumed that ASIC4 Extended SSD mode only used 3 bytes for addressing + device select. But writing that list of ASIC4's modes earlier and re-reading the HDK prompted me to check. After some testing, I found that it does indeed use 4-byte addressing + device select, but for some reason can't use 256MB devices with the method I've outlined above.
So, there will be an update to the #PsiDrive firmware being uploaded very shortly, with added compatibility for a series of comparatively massive SSDs (for the 90s) that have never existed.
Replies (1)
-
@thelastpsion@oldbytes.space 2026-04-03 21:10
I guess the fact that device selection bits can be moved means that the software doesn't actually have to care too much about devices. If the bits for selecting a chip are directly above the address space, then you can address them like it's just one contiguous block of data. I just wish the bloody HDK had mentioned it!