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Recipes contain bits and pieces of hardware-related knowledge, but these bits feel sparse. I've been wanting to consolidate hardware- related documentation for a while, but always fell at odds with the recipes organisation. We don't have recipes anymore, just a /doc/hw section that contains hardware-related documentation which often translate to precise instructions to run Collapse OS on a specific machine. With this new organisation, I hope to end up with a better, more solid documentation.
17 lines
561 B
Plaintext
17 lines
561 B
Plaintext
( We process the 0x20 exception by pre-putting a mask in the
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(HL) we're going to write to. If it wasn't a 0x20, we put a
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0xff mask. If it was a 0x20, we put a 0x7f mask. )
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: @GET,
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A 0x03 LDri, ( @GET )
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DE COM_DRV_ADDR LDdi,
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0x28 RST, JRNZ, L2 FWR ( maybeerror )
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A ORr,
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CZ RETc, ( Sending a straight NULL ends the comm. ) ;
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: @PUT, ( @PUT that char back )
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C A LDrr,
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A 0x04 LDri, ( @PUT )
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0x28 RST, JRNZ, L3 FWR ( error )
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A C LDrr, ;
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H@ ORG !
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HL DEST_ADDR LDdi, ( cont. )
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