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collapseos/arch/z80/ti84/blk/617
Virgil Dupras 7001446212 Complete overhaul of recipes
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.
2020-10-30 20:39:39 -04:00

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( wait until all keys are de-pressed. To avoid repeat keys, we
require 64 subsequent polls to indicate all depressed keys.
all keys are considered depressed when the 0 group returns
0xff. )
: _wait 64 BEGIN 0 _get 0xff = NOT IF DROP 64 THEN
1- DUP NOT UNTIL DROP ;
( digits table. each row represents a group. 0 means
unsupported. no group 7 because it has no key. )
CREATE _dtbl
0 C, 0 C, 0 C, 0 C, 0 C, 0 C, 0 C, 0 C,
0xd C, '+' C, '-' C, '*' C, '/' C, '^' C, 0 C, 0 C,
0 C, '3' C, '6' C, '9' C, ')' C, 0 C, 0 C, 0 C,
'.' C, '2' C, '5' C, '8' C, '(' C, 0 C, 0 C, 0 C,
'0' C, '1' C, '4' C, '7' C, ',' C, 0 C, 0 C, 0 C,
0 C, 0 C, 0 C, 0 C, 0 C, 0 C, 0 C, 0x80 ( alpha ) C,
0 C, 0 C, 0 C, 0 C, 0 C, 0x81 ( 2nd ) C, 0 C, 0x7f C,