Thomas Harte
2957a31f40
Adds absolute, x; absolute,y; and accumulator addressing modes.
...
Now covered: 80/256 opcodes, from 2/6 pages of the data sheet; or 16/47 bus programs.
2020-09-25 21:16:36 -04:00
Thomas Harte
8c11df52bf
Adds absolute long, x.
...
Factors out the commonality of a closing read/write while I'm here.
2020-09-25 19:27:17 -04:00
Thomas Harte
2b7ffcd48f
Takes a run at JSL al.
2020-09-25 18:35:00 -04:00
Thomas Harte
7980a9033e
Adds two-thirds of absolute long.
...
Working total: 31 opcodes covered; 10/47ths of bus patterns.
Next is JSL, which I think will require additional operations.
2020-09-25 18:16:49 -04:00
Thomas Harte
125ddfa513
Pays a little attention to runtime storage; completes the first page of bus patterns.
2020-09-25 18:00:02 -04:00
Thomas Harte
636e929607
Adds a check for 8/16-bit redundancy.
2020-09-25 17:42:42 -04:00
Thomas Harte
22c792dc46
Adds enough logic to start serialising instructions to somewhere.
...
Possibly extraneous for now, but it means I can start stepping and testing.
2020-09-25 17:18:25 -04:00
Thomas Harte
95af1815c8
Completes absolute indexed indirect micro-ops.
...
For the record: this is just six out of forty-seven codes complete. Or about two-thirds of six pages. Plenty to do even before I start trying to interpret these things.
2020-09-24 22:37:31 -04:00
Thomas Harte
d707c5ac95
Switches to generators with stable pointers; adds 2a.
2020-09-24 22:27:20 -04:00
Thomas Harte
5c9192e5e6
Switches to generators for spitting out micro-ops.
...
Hopefully with a lot of parts to factor out naturally.
2020-09-24 17:36:11 -04:00
Thomas Harte
72b5584042
Immediately runs afoul of a read/write difference in the specs between 8/16-bit mode that suggests maybe this isn't a good structure.
...
Perhaps generators of some sort?
2020-09-23 22:28:15 -04:00
Thomas Harte
f9045b5352
Rounds out declaration of the absolutes.
2020-09-23 22:23:23 -04:00
Thomas Harte
f87fe92bc8
Begins a meandering road towards the 65816.
2020-09-23 22:14:42 -04:00
