PCE: ADPCM deviations from standard #173
Description
Various ADPCM- and CDROM-related functionality has different behaviour than original hardware; while this may or may not be apparent on games, it means that emulation needs to be improved.
Krikzz published a test program to validate various CDROM-related items here:
https://github.com/krikzz/turbo-ed-pub/tree/main/tcd-verificator
How to use it:
Run the "verificator.pce" ROM as though it was the CD BIOS, while also using the "Last Alert (US)" CD disc (and run it). It will be a series of menus.
The source code is also included, in order to understand various error types - but several tests are run for each line, and the first error will abort the remaining tests on that line. This code may (or may not) help.
Sample output from "Run all tests" - Turbo Everdrive Pro:
Sample output from Mednafen (as at 2025-03-09):
