87 Commits

Author	SHA1	Message	Date
Chris Pressey	c11869f322	Not making any promises, but reduce the errors under Python 3.	2018-09-05 21:45:58 +01:00
Chris Pressey	4986454733	Support save'ing user-defined locations.	2018-04-25 13:27:47 +01:00
Chris Pressey	07541d7913	Compile code for saving a, x, or y on the stack.	2018-04-25 13:15:53 +01:00
Chris Pressey	bc91ef1602	Compile byte-table add, sub, cmp, and, or, xor, shl, shr, inc, dec.	2018-04-18 16:32:12 +01:00
Chris Pressey	e565234d28	Support for shl foo and shr foo where foo is a byte storage.	2018-04-18 12:01:53 +01:00
Chris Pressey	3c7d95a724	Support for copy [ptra]+y, [ptrb]+y to indirect LDA indirect STA	2018-04-18 10:57:57 +01:00
Chris Pressey	70247e0e44	Generate zero-page code for and, or, and xor, when possible.	2018-04-17 17:58:26 +01:00
Chris Pressey	27df0d27db	Optimize away RTS and JMP when possible. Fallthru stuff done.	2018-04-05 14:10:04 +01:00
Chris Pressey	2ca843ece7	Begin hooking the fallthru analysis up to the compilation phase.	2018-04-05 10:52:14 +01:00
Chris Pressey	fa1b0cfae1	Support branching and looping on the n flag.	2018-03-29 14:45:28 +01:00
Chris Pressey	ebe53f540c	Fix bug when zero page address was $00.	2018-03-29 11:46:56 +01:00
Chris Pressey	eadf1eb4ae	A byte or word table can be initialized with a list of constants.	2018-03-29 11:09:02 +01:00
Chris Pressey	2f513f7291	Initial support for initializing byte tables with list of bytes.	2018-03-29 10:45:18 +01:00
Chris Pressey	9b912de17c	Accessing zero-page with ld and st generates zero-page opcodes.	2018-03-29 10:31:42 +01:00
Chris Pressey	1f992f8dbd	Support of NOP opcode.	2018-03-28 14:52:16 +01:00
Chris Pressey	96fbe03ce7	Make compilation tests pass.	2018-03-14 16:27:33 +00:00
Chris Pressey	adb53f7a04	Almost compile for loops correctly.	2018-03-14 15:33:11 +00:00
Chris Pressey	9ad34ed34f	Refine the AST classes even more.	2018-03-06 10:43:23 +00:00
Chris Pressey	8a7e3aaebb	Flatten more.	2018-03-05 15:32:08 +00:00
Chris Pressey	1180d2fe2a	Attempt to flatten the code for generating code for copy.	2018-03-05 15:22:47 +00:00
Chris Pressey	c194808e64	Label the various cases for compiling a copy instruction.	2018-03-05 13:23:09 +00:00
Chris Pressey	c85159a9c0	Start trying to clean up the code for compiling copy.	2018-03-05 12:34:24 +00:00
Chris Pressey	0a83d90515	Tighten structure of AST more.	2018-03-05 12:13:15 +00:00
Chris Pressey	5fa8c69bd2	Don't fudge the name of IndexRefs; dig in to find the ref's name.	2018-02-13 17:17:27 +00:00
Chris Pressey	7a024f3062	Compile static storage location access.	2018-02-09 16:13:09 +00:00
Chris Pressey	52fb1dc6b9	Inch toward compiling statics.	2018-02-09 14:44:41 +00:00
Chris Pressey	71cded0297	Move compiler towards being able to compile access to statics.	2018-02-09 14:13:39 +00:00
Chris Pressey	ca1c877a60	Support indirect refs in st, e.g. st a, [ptr] + y.	2018-02-09 11:23:18 +00:00
Chris Pressey	f92e1f15bf	Tired: copy [ptr]+y, a. Wired: ld a, [ptr]+y.	2018-02-08 11:58:24 +00:00
Chris Pressey	34daad0e56	Make ld parse to a IndexedRef or IndirectRef (latter still todo.)	2018-02-08 11:04:11 +00:00
Chris Pressey	7c8f113c07	Properly store address (not contents) of routine into vector table.	2018-02-07 13:56:17 +00:00
Chris Pressey	6c1c1cb153	Include final RTS when emitting trampolines for indirect calls.	2018-02-07 11:11:14 +00:00
Chris Pressey	43b3a088b0	Use a vector table in the demo game.	2018-02-06 15:03:59 +00:00
Chris Pressey	a082aee001	NOt 100% sure it's correct, but it seems close.	2018-02-02 17:56:50 +00:00
Chris Pressey	4abedc0442	Centralize helper, use it elsewhere.	2018-02-02 17:05:15 +00:00
Chris Pressey	548905dce4	Initialized byte tables need not have all 256 bytes initialized.	2018-02-02 16:31:23 +00:00
Chris Pressey	f9dc730f88	copy []+y, a to indirectly read byte into the a register.	2017-12-13 16:11:02 +00:00
Chris Pressey	c7861d375c	trash indicates a value is no longer considered meaningful.	2017-12-13 15:23:06 +00:00
Chris Pressey	5f535c963e	Subtract word (constant or memory location) from word memory location.	2017-12-13 14:07:59 +00:00
Chris Pressey	75cc1f6b25	Factor out utility method for selecting addressing mode.	2017-12-13 12:14:26 +00:00
Chris Pressey	f87bcf5ee4	Initial work on initialized byte tables.	2017-12-12 16:41:49 +00:00
Chris Pressey	50390b0787	Can copy a literal word to a word table.	2017-12-12 16:04:59 +00:00
Chris Pressey	63f75a26b4	Initialized word type memory locations.	2017-12-12 15:34:51 +00:00
Chris Pressey	4854077cce	Correctly analyze repeat { ... } forever loops.	2017-12-12 15:18:59 +00:00
Chris Pressey	2216fcec17	copy from word storage to word table and back, indexed by x or y.	2017-12-11 12:02:48 +00:00
Chris Pressey	b86e7491d5	Copy word to word table.	2017-12-11 11:43:53 +00:00
Chris Pressey	bef1aba8ce	Do not assume every label refers to a word-sized chunk of memory.	2017-12-11 10:42:42 +00:00
Chris Pressey	84ca6c4e96	Break the ground where we need to implement word table read/write.	2017-12-08 15:53:18 +00:00
Chris Pressey	ad8e0647a4	Use right endianness when copying literal word into storage.	2017-12-07 16:49:43 +00:00
Chris Pressey	75cf18d3a2	Add word (constant or memory loc) to pointer (unchecked for now).	2017-12-07 14:14:43 +00:00