Thomas Harte
|
f589d639db
|
Okay, so it seems that sync also works the other way around.
|
2016-07-09 22:25:44 -04:00 |
|
Thomas Harte
|
693c8b2438
|
After all that, it seems likely that inputs just aren't inverted for the Vic.
|
2016-07-09 20:03:38 -04:00 |
|
Thomas Harte
|
656cd211d7
|
Was transmitting bit levels backwards (probably?); 1540 now acknowledges byte received.
|
2016-07-09 18:06:49 -04:00 |
|
Thomas Harte
|
7cc4bf3fe7
|
Hit and hope is getting me nowhere. Time to unit test this thing.
|
2016-07-09 15:40:25 -04:00 |
|
Thomas Harte
|
8827597363
|
Messier and messier, but I've at least attempted to implement hardware attention acknowledge.
|
2016-07-08 19:00:39 -04:00 |
|
Thomas Harte
|
9a08ef61cb
|
Still fumbling in the margins: made an effort not to imply that the 1540 is forever reading syncs.
|
2016-07-07 22:13:18 -04:00 |
|
Thomas Harte
|
199c0e27e0
|
Mostly just random guesses now, to be honest. It's approaching the end of my window for the morning.
|
2016-07-07 07:16:36 -04:00 |
|
Thomas Harte
|
81e6cc34e5
|
Per the ROM disassembly, the Vic's VIA outputs are inverted for the benefit of the serial bus.
|
2016-07-07 06:57:21 -04:00 |
|
Thomas Harte
|
c9479f923b
|
The inversion of truth was clearly just a problematic API. Got explicit. LineLevel might need to become more pervasive.
|
2016-07-07 06:44:13 -04:00 |
|
Thomas Harte
|
dcb86a027a
|
Okay, so the 1540 doesn't toggle the actual attention line. I don't know what it does yet but this helps.
|
2016-07-06 22:31:14 -04:00 |
|
Thomas Harte
|
1baf21827c
|
Since the ROM is well disassembled, let's actually try to be a 1541 first.
|
2016-07-06 22:17:32 -04:00 |
|
Thomas Harte
|
f64cd8cfcb
|
Quick fixes properly to declare the DriveVIA, to ensure its interrupts take effect, and to wire ATN IN to CA1 rather than CB2.
|
2016-07-06 20:22:46 -04:00 |
|
Thomas Harte
|
428fcdb978
|
Centralised and improved serial logging.
|
2016-07-06 07:46:21 -04:00 |
|
Thomas Harte
|
8819711bc8
|
Threw in the second VIA as a currently clearly incorrect thing.
|
2016-07-05 22:22:09 -04:00 |
|
Thomas Harte
|
93c2bb80a2
|
Improved a comment, added independent C[A/B]2 input mode.
|
2016-07-05 21:11:51 -04:00 |
|
Thomas Harte
|
6c4fa4ec5d
|
Improved commenting and initial state communication.
|
2016-07-05 20:57:31 -04:00 |
|
Thomas Harte
|
1e6d90de17
|
Made an attempt properly to deal with initial bus state.
|
2016-07-05 20:52:33 -04:00 |
|
Thomas Harte
|
c3b7d24293
|
It appears that the attention line is also wired to CB2. So the ball is back in the 6522's court.
|
2016-07-05 19:19:46 -04:00 |
|
Thomas Harte
|
11fc43aa04
|
Made an attempt to allow the 1540 to talk back to the Vic, and to receive interrupts. Also slightly disambiguated debugging logging.
|
2016-07-05 19:12:43 -04:00 |
|
Thomas Harte
|
d16b79073e
|
Further fleshing out: added a serial port for the serial bus.
|
2016-07-05 17:27:02 -04:00 |
|
Thomas Harte
|
d1eea6943d
|
Ensured the 1540 ROM gets installed, at least.
|
2016-07-05 16:54:25 -04:00 |
|
Thomas Harte
|
86dabd007b
|
Furthered fleshing out of the 1540. Though it doesn't yet receive a ROM so won't even attempt to do anything meaningful.
|
2016-07-05 16:39:18 -04:00 |
|
Thomas Harte
|
a25fcc7190
|
Made a first attempt at wiring back serial port input.
|
2016-07-05 16:10:54 -04:00 |
|
Thomas Harte
|
d2cded7b59
|
Attempted to separate out the concept of a serial port and a serial bus, since the bus may be shared, and to establish half duplex communications from the Vic.
|
2016-07-05 14:55:20 -04:00 |
|
Thomas Harte
|
0d3d0fbe4d
|
Created a namespace for Commodore and an empty container file for the 1540[/1] implementation.
|
2016-07-05 13:28:27 -04:00 |
|