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Author SHA1 Message Date
Thomas Harte
f2336d2efc I think reloads occur after overflow, not before. 2021-06-26 23:16:00 -04:00
Thomas Harte
c2d093fa3c Respect user volume input. 
Basic tones are now present. Neato!
 2021-06-24 22:27:02 -04:00
Thomas Harte
1a97cc8a91 Start making some effort towards audio generation. 2021-06-24 22:21:01 -04:00
Thomas Harte
c34a548fa0 Ensure character pixel reads can't go out of bounds. 2021-06-24 22:19:50 -04:00
Thomas Harte
d1b89392a2 Improve exposiiton. 2021-06-24 22:18:31 -04:00
Thomas Harte
ed734754e5 Adds a through route for IMG files. 2021-06-24 21:04:21 -04:00
Thomas Harte
520c3c9218 Corrects colour deserialisation. 
Long story short: the documentation I'm reading inexplicably lists the bits in reverse order. Luckily, a lot of the other documentation doesn't.
 2021-06-24 20:59:04 -04:00
Thomas Harte
9230cf1726 Corrects bug when left_ or right_margin_ = 0. 2021-06-24 20:28:50 -04:00
Thomas Harte
6e616972a5 Better binds margin tests to window movements; simplifies line parameter addressing. 2021-06-24 18:55:15 -04:00
Thomas Harte
f98888824d Switches to an overt active/inactive state machine. 2021-06-24 18:34:21 -04:00
Thomas Harte
6c8b23e708 Alters 4bpp mapping; adds character mode 4bpp and 8bpp. 2021-06-23 19:35:47 -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
88f0f2b623 Adds to the macOS UI and wires through all Enterprise options. 2021-06-22 21:39:07 -04:00
Thomas Harte
0afa143375 Add missing include. 2021-06-22 21:31:46 -04:00
Thomas Harte
8319aca351 Correct syntax errors. 2021-06-22 20:50:03 -04:00
Thomas Harte
a66734883a Starts sketching out Dave. 2021-06-22 19:33:41 -04:00
Thomas Harte
d2ab0dd839 Adds a quick way to get the compiler to pick an integral type. 2021-06-22 19:33:29 -04:00
Thomas Harte
2574407afb Relocates MinIntTypeValue to Numeric. 2021-06-22 19:33:02 -04:00
Thomas Harte
83a54fd6d2 Use the FAT12 boot sector to determine geometry. 2021-06-22 06:54:17 -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
3acd0be1f7 Copy and paste 2bpp character support. 2021-06-21 23:27:13 -04:00
Thomas Harte
69c0734975 WD1770: switch motor on even if spin-up is disabled. 2021-06-21 23:26:55 -04:00
Thomas Harte
c1678d7be7 Corrects exposition and transmission of drive selection. 
What a klutz I've been.
 2021-06-21 22:56:25 -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
6025516f9f Ensure addresses increment even when there's no target for pixels. 2021-06-20 14:31:02 -04:00
Thomas Harte
d8b9cdf7a2 Correct multiplier. 2021-06-20 14:25:37 -04:00
Thomas Harte
09dbff39f2 Also map keypad to F keys. 
This is a pragmatic and arguably Apple-centric decision. But also it's fairly arbitrary, as the Enterprise doesn't have a number pad.
 2021-06-20 14:25:28 -04:00
Thomas Harte
2fe15a6168 Switch to idealised Nick clock rate. 2021-06-20 14:21:56 -04:00
Thomas Harte
07dc26f8fa Adds TODO to resolve screen jumping. 2021-06-19 23:41:29 -04:00
Thomas Harte
a08d65b1ff Adds IMG -> Enterprise connection. 
Albeit still without an Enterprise static analyser.
 2021-06-19 23:16:33 -04:00
Thomas Harte
199621db08 Observes that the actual guess here is MS-DOS-style. 2021-06-19 23:11:51 -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
42a98e1676 Fix composition with empty nodes. 2021-06-19 22:13:17 -04:00
Thomas Harte
23e26e0333 Attempts to complete handling of VRES. 2021-06-19 22:00:19 -04:00
Thomas Harte
fadb04f3f3 Attempts to implement LSBALT and MSBALT. 2021-06-19 21:57:26 -04:00
Thomas Harte
4968ccf46d Corrects attributed mode. 2021-06-19 13:08:14 -04:00
Thomas Harte
1dcac304d3 Implements the ALTIND bits and attempts ATTR mode. 2021-06-19 13:04:18 -04:00
Thomas Harte
1651efe4fc Ensures all keys are initially unpressed. 2021-06-19 13:03:31 -04:00
Thomas Harte
8f24aed43e Slightly reduces logging. 2021-06-18 23:17:44 -04:00
Thomas Harte
a381374e31 Drops back down to 64kb. 2021-06-18 23:14:44 -04:00
Thomas Harte
9411c37d23 Fleshes out the keyboard map. 2021-06-18 23:14:35 -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
266310d9c2 Fixes automatic flushing for non-1/1-clocked actors. 2021-06-18 18:43:08 -04:00
Thomas Harte
fbf1adef05 Introduces unit test and thereby seemingly fixes get_next_sequence_point. 
There's still improper output in the actual machine though, so maybe something else is afoot?
 2021-06-18 17:44:17 -04:00
Thomas Harte
311ddfb05a Add note to self for tomorrow. 2021-06-17 22:34:52 -04:00