52 Commits

Author	SHA1	Message	Date
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
Chris Pressey	a4fd0e590b	Adding a word memory location to another word memory location.	2017-12-07 13:15:21 +00:00
Chris Pressey	92525fd482	Adding a constant word to a memory location.	2017-12-07 12:48:56 +00:00
Chris Pressey	d84566a880	Write stored values, and read values, through pointers.	2017-12-01 13:52:56 +00:00
Chris Pressey	32389e4422	Require that the program does ^buf to get at the address of buf.	2017-12-01 12:36:58 +00:00
Chris Pressey	a95cbb0f47	Introduce IndirectRef and use it instead of adhoc 'copy[]+y' opcode.	2017-12-01 11:44:40 +00:00
Chris Pressey	19a196f765	Compile copy[]+y.	2017-11-24 16:56:55 +00:00
Chris Pressey	c8c69a2a7d	Fix problem with test case, and with serializing as zero page.	2017-11-24 13:42:14 +00:00
Chris Pressey	e41dd1aa01	Attempt to add Zero Page addressing; the emitter may need rethink.	2017-11-24 13:09:10 +00:00
Chris Pressey	c91574186b	First pass of buffer, pointer, copy b, [p] + y, indirect indexed.	2017-11-24 12:35:36 +00:00
Chris Pressey	22cc7bfc11	Support copy'ing a word constant to a word location. Joystick eg.	2017-11-20 15:18:21 +00:00
Chris Pressey	e2daa33dc5	Compile copy byte to byte and word to word.	2016-06-16 11:10:03 -05:00
Chris Pressey	7b1ee60a73	Initial value for locations: changed syntax, executes, compiles.	2016-06-16 11:03:31 -05:00
Chris Pressey	0d3ac8c247	{Low,High}AddressByte emittables to fix copy, make indirect call!	2015-10-22 16:20:10 +01:00
Chris Pressey	0b2b5d904e	Implement indirect JSRs with trampolines in theory; doesn't work.	2015-10-22 15:45:16 +01:00
Chris Pressey	16450e06d5	Compile goto's.	2015-10-21 15:51:52 +01:00
Chris Pressey	16649042cb	I kind of forgot that indirect JSR needs a trampoline first :/	2015-10-20 13:15:21 +01:00
Chris Pressey	f16cb75677	Fix compiler. All tests pass once again.	2015-10-20 12:53:07 +01:00
Chris Pressey	2dc4dd988e	Parse indirect calls, but break evaluator.	2015-10-20 09:33:30 +01:00
Chris Pressey	98524e931a	Vector and routine types are constructors with constraints now.	2015-10-19 18:18:06 +01:00
Chris Pressey	04de73d04d	Solve this by defining an Offset emittable.	2015-10-19 08:55:47 +01:00
Chris Pressey	e3fe337730	Interesting dead end we've got ourselves into here.	2015-10-18 23:31:17 +01:00
Chris Pressey	645079f03a	Implement 'with interrupts off'.	2015-10-18 23:15:40 +01:00
Chris Pressey	a9bd8a3714	Indexed access, + x / + y, at least for LDA and STA. ... --HG-- rename : eg/screen.60p => eg/screen1.60p	2015-10-18 18:32:20 +01:00
Chris Pressey	e1cf162a5b	Refs have types.	2015-10-18 17:23:01 +01:00
Chris Pressey	522c771208	Add explicitly-addressed memory locations.	2015-10-18 16:22:36 +01:00
Chris Pressey	49e42af953	Implement if not and repeat forever.	2015-10-18 15:32:28 +01:00
Chris Pressey	c5998ed240	Compile repeat loops.	2015-10-18 13:55:40 +01:00
Chris Pressey	070ffacf69	Don't generate code for empty else blocks.	2015-10-17 18:25:54 +01:00
Chris Pressey	b6bb64528f	Implement compiling if, but we need relative addressing first.	2015-10-17 16:34:02 +01:00
Chris Pressey	479b484313	Compile the rest of the instructions.	2015-10-17 16:17:35 +01:00
Chris Pressey	e62fd85ccf	Compile access of defined memory locations.	2015-10-17 15:46:28 +01:00
Chris Pressey	a3160a5166	Call defined routines.	2015-10-17 15:23:00 +01:00
Chris Pressey	643a48a2c5	Compiler object, labels, compile 'call'... It prints 'A'!	2015-10-17 15:06:50 +01:00
Chris Pressey	2ffff3bbdb	Make extern routines survive analysis.	2015-10-17 14:54:28 +01:00
Chris Pressey	5b429adfd9	6502 opcodes are Emittables. Can compile simple programs now!	2015-10-17 11:08:25 +01:00