#310 Tape Traps differ from non-tape trap loads

[Fredrick Meunier]

There was a thread by Woody on WoS a few weeks ago on checking proper register values in various cases of tape loading with tape traps.

Fuse fails a couple of the tests referenced there, and we have seen problems in the past where tape traps leaving wrong values in registers leads to software misbehaving ([bugs:#14], [patches:#41], [r2137]).

The failing tape trap tests from Woody suggests that in some cases IX, DE and AF can have unexpected values when tape traps are used.

[Fredrick Meunier]

The failed tests are:
Block 4

Saved data block:
IX = 0000, DE = 0020, A = FE

ROM loader parameters:
IX = 0000, DE = 0020, AF = FF01

ROM loader results:
IX = 00FF (expected 0000)
DE = FF21 (expected 0020)
AF = 0062 (expected 0100)

Block 5

Saved data block:
IX = FFFF, DE = 805D, A = 05

ROM loader parameters:
IX = 0000, DE = 0000, AF = FF01

ROM loader results:
IX = 0000
DE = 0000
AF = 0093 (expected FF82)

[Sergio Baldoví]

Strangely test 4 and 5 are successful to me. The failed test is:

Block 2

Saved data block:
IX = 0000, DE = 0020, A = FF

ROM loader parameters:
IX = 0000, DE = 0040, AF = FF01

ROM loader results:
IX = 0040 (expected 0021)
DE = 0000 (expected 001F)
AF = 8016 (expected 0050)

[Fredrick Meunier]

A surprise to me too. I'm thinking that other options like Detect loaders or Auto-load media are selected? I was testing with 1.1.1 release with Tape Traps, Fast tape loading, Detect tape loaders on and Auto-load media and Accelerate tape loaders disabled. I used the 48k machine.

[Fredrick Meunier]

I wonder how much different selected tape loading options affect the results?

I started with the following: turned off all tape options and loaded tapetest.tap and all 6 blocks did load without reported errors.

Turned on loader detection and tried again, this time block 6 failed to load:

Saved data block:
IX = 0000, DE = 0040, A = 01

ROM loader parameters:
IX = 0000. DE = 0020, AF = FF01

ROM loader results:
IX = 0020 (expected 0000)
DE = 0000 (expected 0020)
AF = 0093 (expected 0050)

[Sergio Baldoví]

Ok, I see similar results:

My first test (block 2 failed) was with all tape options enabled.

All blocks load successfully with tape options disabled.

Block 6 fails with only loader detection.

I can't run any test with Tape Traps, Fastloading, Detect loaders on and Auto-load media and Accelerate loaders disabled.