collapseos/blk/650

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2020-05-16 09:51:02 -04:00
AVR assembler
2020-06-28 06:57:59 -04:00
This assembler works very much like Z80 assembler (B200) so
refer to this documentation first. Here, we document specifici-
ties.
All mnemonics in AVR have a single signature. Therefore, we
don't need any "argtype" suffixes.
Registers are referred to with consts R0-R31. There is
X, Y, Z, X+, Y+, Z+, X-, Y-, Z- for appropriate ops (LD, ST).
XL, XH, YL, YH, ZL, ZH are simple aliases to R26-R31.
Branching works differently. Instead of expecting a byte to be
written after the naked op, branching words expect a displace-
ment argument. (cont.)