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22 lines
1.3 KiB
Plaintext
22 lines
1.3 KiB
Plaintext
[From Apple II Slack, 4am (2021-06-29)]
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On the subject of "tricky woz images beyond the official test suite," I would recommend
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https://archive.org/details/wozaday_Mr_Do (success = boot to joystick calibration)
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https://archive.org/details/wozaday_Wavy_Navy (success = boot to game)
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https://archive.org/details/wozaday_SAGA_6_Strange_Odyssey (success = begin game, climb down ladder, take shovel)
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https://archive.org/details/wozaday_CongoBongo (success = boot to game)
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https://archive.org/details/wozaday_Wizardry_III (success = boot to title screen, press a key, boot to main menu)
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Mr. Do relies on weakbits on track 0. Also, the protection check uses LDA $C088,X to fetch nibbles and expects the entire check to complete before the drive motor turns off.
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Wavy Navy relies on weakbits on track $22
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Strange Odyssey relies on both track length and weakbits on track $22
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Congo Bongo relies on weakbits on track 1, to a much greater degree than others. There is only one small sequence of valid nibbles, surrounded by an entire track of weakbits. This has flummoxed many emulators.
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Wizardry III relies on track length, and it is extremely sensitive to the precise timing of when the data latch "sees" bits and how long it holds on to a full nibble before resetting itself.
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