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collapseos/arch/z80/sms/blk/613
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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CODE _status
A 0b11111101 LDri, ( TH output, unselected )
PAD_CTLPORT OUTiA,
PAD_D1PORT INAi,
0x3f ANDi, ( low 6 bits are good )
H A LDrr, ( let's store them )
( Start and A are returned when TH is selected, in bits 5 and
4. Well get them, left-shift them and integrate them to B. )
A 0b11011101 LDri, ( TH output, selected )
PAD_CTLPORT OUTiA,
PAD_D1PORT INAi,
0b00110000 ANDi,
A SLA, A SLA, H ORr,
PUSHA,
;CODE