Thomas Harte
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c1bae49a92
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Standardises on read and write for bus accesses.
Logic being: name these things for the bus action they model, not the effect they have.
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2020-01-05 13:40:02 -05:00 |
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Thomas Harte
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0b771ce61a
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Removes all instances of the copyright symbol.
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2018-05-13 15:19:52 -04:00 |
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Thomas Harte
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798cdba979
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8255: update_outputs now affects only those ports designated as outputs.
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2017-12-10 17:55:37 -05:00 |
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Thomas Harte
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3bdedfd749
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Improved comments.
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2017-08-08 07:44:46 -04:00 |
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Thomas Harte
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390ecec3d9
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Added: now declines to pass on output if in input mode for ports A and B.
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2017-08-07 19:56:22 -04:00 |
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Thomas Harte
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4709ae80cb
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Added port direction tests.
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2017-08-07 19:36:55 -04:00 |
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Thomas Harte
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64da8e17d1
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Fixed: of course this should take a reference to an existing port handler rather than hatching its own; otherwise additional communication with a port handler by an i8255 owner doesn't work as intended.
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2017-08-01 17:01:20 -04:00 |
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Thomas Harte
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08ad35efd9
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It's barely an implementation of the 8255, but ensured that data is bounced into the PortHandler, conveniently assuming the interaction mode used by the CPC.
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2017-08-01 16:34:13 -04:00 |
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Thomas Harte
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58b98267fc
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Formally transferred ownership of PIO accesses to an incoming template, and decided to start being explicit about how to specify the interfaces and provide fallbacks for optional behaviour for the new, clean generation of interfaces. A full-project sweep will inevitably occur but I'll try to tie off this branch first.
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2017-08-01 16:15:19 -04:00 |
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