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2018-01-05 16:27

tlr

Registered: Sep 2003
Posts: 1714

Release id #161259 : Superfluid V0.5

I tried to make a freeze function with a little less stack corruption than usual for this but it seems it didn't work well on 1541u2. Thanks to insane for reporting this!

In the original (old) freezer implementation I more or less acknowledge the freeze immediately to allow switching in cart ram. This way timing critical stuff can be preserved directly to cart ram instead of pushing it to stack. This works _sometimes_ on 1541u2.

In the revised implementation (0.5) I do the regular, push to stack, then wait ~250 ms, then ack freeze. This works fairly reliably on 1541u2.

I guess the problem arises from some double trigging of the NMI but I'm not 100% sure. Looking at the 1541u2 source there doesn't seem to be any debouncing of the button in the FPGA at least. The specification for RR/NR states that the freeze button is digitally debounced so I was hoping that would be the same in all implementations.

REQUEST:
I don't have an actual RR or NR to test on but I did build one 0.5 variant with the original freezer and was hoping someone would be willing to test both that and the original one on RR and/or NR. Any takers?

original (old): superfluid-0.5x.zip
revised (current): Superfluid V0.5

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2018-02-10 15:17

tlr

Registered: Sep 2003
Posts: 1714

A new release is out: Superfluid V0.6

It includes three different variants: Retro Replay, Nordic Replay and Retro Replay experimental.

The Retro Replay variant should work on all hardware variants and clones.

I've also included a small document detailing the expected cart mappings, derived from the actual Retro Replay and Nordic Replay hardware from iComp.

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