Thomas Harte
687f4bb3bb
Adds relative and relative long bus patterns.
...
Many of the rest cover only one or two opcodes so this puts me at 216/256 opcodes covered; 35/47 bus programs; just more than 5/7 pages.
2020-09-26 20:24:50 -04:00
Thomas Harte
473799cb62
There's not a lot to STP and WAI from a bus program point of view.
2020-09-26 20:18:30 -04:00
Thomas Harte
3dc22a9fd5
Adds implied and immediate modes.
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... for 204/256 opcodes covered.
2020-09-26 17:42:42 -04:00
Thomas Harte
f54b655606
Adds d, x and d, y.
2020-09-26 17:26:17 -04:00
Thomas Harte
d2e868ea2b
Adds (d), y; [d], y; and [d].
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Now covered: 146/256 opcodes, 4/7 pages, 25/47 bus programs.
2020-09-26 16:55:58 -04:00
Thomas Harte
1512ac11da
Adds (d, x) and (d) modes. Albeit by deferring the hard work.
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That's: 122/256 opcodes; 22/47 bus programs, ~3.5/7 pages transcribed. Maybe I'll be able to get to the runtime stuff sooner rather than later?
2020-09-25 22:22:30 -04:00
Thomas Harte
5039cc7bb2
Adds direct page.
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... to cover 106 opcodes.
2020-09-25 22:01:36 -04:00
Thomas Harte
5360a7b4ce
Adds block moves.
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These are fairly specialised, dealing in two data addresses simultaneously.
2020-09-25 21:49:03 -04:00
Thomas Harte
2957a31f40
Adds absolute, x; absolute,y; and accumulator addressing modes.
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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.
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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
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
22c792dc46
Adds enough logic to start serialising instructions to somewhere.
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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.
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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.
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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
