Thomas Harte
7f08218b28
The Nick interrupt input also seems to be a live poll, not a retrieval of the mask.
...
This corrects the two pieces of software I knew not to be working.
2021-06-28 22:10:11 -04:00
Thomas Harte
2c139ad931
Adds some notes to self.
...
I think I'm starting to find enough information to handle tapes.
2021-06-28 22:03:06 -04:00
Thomas Harte
1119779c8b
Ensure EXDOS card is completely disabled if no FDC is present.
2021-06-28 21:47:53 -04:00
Thomas Harte
36805cb120
Correct tone channel interrupts, remove dead warning.
2021-06-27 23:21:00 -04:00
Thomas Harte
b93575bbcc
Spots that b0 and b2 of 0xb4 are 'dividers', not enables.
2021-06-27 22:33:20 -04:00
Thomas Harte
e4a650aaff
Implements the 1Hz interrupt.
2021-06-27 21:47:21 -04:00
Thomas Harte
2f53b105bb
The Enterprise is now an Activity::Source; also sketches out the owner of Dave's timed interrupt logic.
2021-06-27 21:02:04 -04:00
Thomas Harte
be19fa9dde
This mapping needs to know where it will occur.
2021-06-27 17:30:09 -04:00
Thomas Harte
81e9ba5608
This is correct from the Enterprise's side of things, I think.
...
I just need to complete the missing part of JustInTimeActor. After I do some empirical testing of this.
2021-06-27 17:24:21 -04:00
Thomas Harte
1ea034310a
Edge up very close to video waits.
...
I just need to implement back conversions that include marginal phase over in the JustInTimeActor.
2021-06-27 16:28:01 -04:00
Thomas Harte
895d98e266
Implements out-of-video-area pauses.
2021-06-27 16:11:22 -04:00
Thomas Harte
903e343895
Attempts to complete Dave's audio duties.
2021-06-27 14:06:49 -04:00
Thomas Harte
f8bb66d2a0
Attempts an essentially-complete implementation of tone channels.
2021-06-26 23:39:59 -04:00
Thomas Harte
1a97cc8a91
Start making some effort towards audio generation.
2021-06-24 22:21:01 -04:00
Thomas Harte
2c2bb3765f
Withdraws the EPDOS option.
...
At least for now; it's something to worry about later.
2021-06-23 19:32:34 -04:00
Thomas Harte
0d165740ea
Honours memory size request.
2021-06-22 21:48:55 -04:00
Thomas Harte
a66734883a
Starts sketching out Dave.
2021-06-22 19:33:41 -04:00
Thomas Harte
e062780968
Extends back to 128kb and stops halting on unrecognised ports.
2021-06-22 06:15:42 -04:00
Thomas Harte
117f9a9794
Adds notes on intended meaning of status register.
2021-06-21 07:31:58 -04:00
Thomas Harte
b49cc407c6
Adds some guesses as to the EXDos expansion.
...
... with plenty left to do.
2021-06-20 22:30:27 -04:00
Thomas Harte
954386f1cc
Creates a shell for the disk-drive add-on card.
2021-06-20 20:50:23 -04:00
Thomas Harte
d7ff6bd04d
Adds necessary declarations to install a DOS ROM.
2021-06-20 20:30:54 -04:00
Thomas Harte
d8b9cdf7a2
Correct multiplier.
2021-06-20 14:25:37 -04:00
Thomas Harte
2fe15a6168
Switch to idealised Nick clock rate.
2021-06-20 14:21:56 -04:00
Thomas Harte
0e1e8c7faa
Attempts to support the panoply of EXOS and BASIC versions.
2021-06-19 22:59:09 -04:00
Thomas Harte
1651efe4fc
Ensures all keys are initially unpressed.
2021-06-19 13:03:31 -04:00
Thomas Harte
a381374e31
Drops back down to 64kb.
2021-06-18 23:14:44 -04:00
Thomas Harte
6af6f21868
Attempts to implement interrupt latches and clears.
2021-06-18 22:59:41 -04:00
Thomas Harte
9a0022cfcb
Removes temporary work.
2021-06-18 18:44:07 -04:00
Thomas Harte
311ddfb05a
Add note to self for tomorrow.
2021-06-17 22:34:52 -04:00
Thomas Harte
2fd8a8aa66
Begins addition of interrupt feedback from Nick.
...
Also fixes clock rate. Though clearly get_next_sequence_point isn't quite right yet.
2021-06-17 22:30:24 -04:00
Thomas Harte
0c3e9dca28
Adds some basic keyboard inputs.
...
I think the next thing required is interrupts though.
2021-06-17 20:47:56 -04:00
Thomas Harte
c331d15429
Makes space to allow for 64kb EXOS ROMs.
...
I think some of the later ROMs have a more thorough memory test, which might provide better detail on whatever's going on here.
2021-06-16 22:25:00 -04:00
Thomas Harte
90b8163d54
Add exposition.
2021-06-15 17:44:39 -04:00
Thomas Harte
a1e4389f63
Give Nick some RAM to inspect and just enough sense to know when it should reload its line parameter table.
2021-06-15 17:43:13 -04:00
Thomas Harte
440b11708b
Adds an unused CRT.
2021-06-14 23:11:48 -04:00
Thomas Harte
f90dce5c54
Take a guess at Nick timing.
2021-06-14 22:56:26 -04:00
Thomas Harte
606c7709cf
Shims in enough to get the Z80 to run perpetually.
...
Notably I don't actually currently know how the interrupt registers work, but getting some sort of display running might be the first order of business.
2021-06-14 22:28:31 -04:00
Thomas Harte
1d1e6d1820
Adds a shell of a Nick.
2021-06-14 22:19:25 -04:00
Thomas Harte
3eb4dd74a2
Exposes memory control.
...
Machine now runs as far as trying to interact with Nick.
2021-06-14 21:45:12 -04:00
Thomas Harte
853914480c
Revised guess; there's a jump to C02E almost immediately.
2021-06-14 21:40:19 -04:00
Thomas Harte
2a2ac1227b
Makes first attempt at giving the Z80 something to do.
2021-06-14 21:29:56 -04:00
Thomas Harte
196c4dcdd9
Adds an appropriate ROM request.
2021-06-14 21:17:09 -04:00
Thomas Harte
c5a86f0ef7
Add Enterprise parts of the static analyser.
2021-06-14 21:11:06 -04:00
Thomas Harte
5f7b3ae313
Adds bare minimum to get a non-functional machine.
2021-06-14 21:02:40 -04:00
Thomas Harte
61c127ed2e
Adds Enterprise as a File -> New... machine.
...
And, similarly, exposes it for the route used by SDL.
2021-06-14 20:55:39 -04:00
