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Author Topic: Dick Tracy (GX4000)  (Read 924 times)

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Offline arnoldemu

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Dick Tracy (GX4000)
« on: 22:30, 09 January 16 »
Just wondering if anyone has ever seen sprites missing on Dick Tracy on a real GX4000 or Plus machine?

The code only sets lower byte of Y coordinate and assumes upper byte is zero at power on/reset time.

ASIC documents say neither X or Y of sprite coordinate are reset at power on so sometimes it should be random and the sprite will not be displayed in the correct y position and will disappear.
« Last Edit: 22:33, 09 January 16 by arnoldemu »
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Offline gerald

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Re: Dick Tracy (GX4000)
« Reply #1 on: 23:28, 09 January 16 »
Just wondering if anyone has ever seen sprites missing on Dick Tracy on a real GX4000 or Plus machine?

The code only sets lower byte of Y coordinate and assumes upper byte is zero at power on/reset time.

ASIC documents say neither X or Y of sprite coordinate are reset at power on so sometimes it should be random and the sprite will not be displayed in the correct y position and will disappear.
I've seen it  ;)
I cannot find any reference in the forum, but I've found a mail I sent you about it last year.
Some other init weirdness : CPC Plus cartridge replacement : one more

Offline arnoldemu

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Re: Dick Tracy (GX4000)
« Reply #2 on: 10:04, 10 January 16 »
I have tested it and most of the time the x,y coordinates are zero after power up.

palette is random.
sprite data is random.
« Last Edit: 15:49, 10 January 16 by arnoldemu »
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