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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.
16 lines
524 B
Plaintext
16 lines
524 B
Plaintext
: _cell! ( tilenum pos )
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2 * 0x7800 OR _ctl ( tilenum ) _data 1 _zero ;
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: _spc! 0 ( blank ) XYPOS @ _cell! ;
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: _lf
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_spc! XYPOS @ [ VDP_COLS LITN ] / 1+ [ VDP_ROWS LITN ] MOD
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[ VDP_COLS LITN ] * XYPOS ! ;
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: _bs _spc! XYPOS @ 1-
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[ VDP_COLS VDP_ROWS * LITN ] MOD XYPOS ! ;
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: (emit)
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DUP 0x08 = IF DROP _bs EXIT THEN
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DUP 0x0d = IF DROP _lf EXIT THEN
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0x20 - DUP 0< IF DROP EXIT THEN
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0x5e MIN ( tilenum ) XYPOS @ _cell!
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XYPOS @ 1+ DUP [ VDP_COLS VDP_ROWS * LITN ]
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= IF DROP 0 THEN XYPOS ! ;
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