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Atari coding BBS
| Re: Another Microwire Question |
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Posted by: Kalms
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Jan,26.2012-02:54
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On another note, it should be possible to eliminate the need of interrupt disabling when talking to the Microwire interface by shifting up the mask & data contents and having a "stop" bit at the bottom of the data word. That relies on the 'fact' that - according to Hatari source - the mask register is rotated, but the data register is shifted during transfer to the LMC1992.
Something like this:
; d0 = data
add.w d0,d0
addq.w #1,d0
move.w #$ffe,microwire_mask
move.w d0,microwire_data
.wait
tst.w microwire_data
bne.s .wait
That loop will wait until the extra "1" stop-bit has been shifted out of the data register.
But the most important thing is probably to ensure that all Microwire transfers in the program use the same strategy.
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Topic
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Posted by
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Date
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Another Microwire Question
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Bod/STAX
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Jan,25.2012-21:35
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Re: Another Microwire Question
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Bod/STAX
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Jan,25.2012-21:36
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Re: Another Microwire Question
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ggn
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Jan,25.2012-23:38
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Re: Another Microwire Question
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Bod/STAX
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Jan,26.2012-01:03
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Re: Another Microwire Question
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Kalms
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Jan,26.2012-02:46
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Re: Another Microwire Question
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Kalms
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Jan,26.2012-02:54
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Re: Another Microwire Question
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Bod/STAX
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Jan,26.2012-12:36
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Re: Another Microwire Question
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ggn
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Jan,26.2012-19:26
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Re: Another Microwire Question
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Sallafranque
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Jan,27.2012-13:52
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Re: Another Microwire Question
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Cyprian
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Jan,27.2012-20:20
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Re: Another Microwire Question
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gwem
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Jan,30.2012-01:40
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Re: Another Microwire Question
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Bod/STAX
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Feb,16.2012-14:41
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What's the anti-troll code?
That's your personal code to be able to add comments and messages on the dhs.nu site.
Don't have a code or forgot it? Fix it here.
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