Differences
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| project:atari_asteroids_autoplay [2013/03/17 04:46] – [3/16/2013 @ 9:07pm] smark | project:atari_asteroids_autoplay [2013/03/17 04:49] – [3/16/2013 @ 9:07pm] smark | ||
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| Line 77: | Line 77: | ||
| ^ DACY#* | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | | ^ DACY#* | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | | ||
| ^ B11 Pin | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | | ^ B11 Pin | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | | ||
| - | ^ Logic Channel | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | | + | ^ Logic Channel | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | | | |
| ^ Sample Value | 1 | 0 | 1 | 0 | 1 | 1 | 0 | 1 | 0 | 0 | | ^ Sample Value | 1 | 0 | 1 | 0 | 1 | 1 | 0 | 1 | 0 | 0 | | ||
| ^ Digit Weight | 512 | 256 | 128 | 64 | 32 | 16 | 8 | 4 | 2 | 1 | | ^ Digit Weight | 512 | 256 | 128 | 64 | 32 | 16 | 8 | 4 | 2 | 1 | | ||
| Line 85: | Line 85: | ||
| Now whats important to note is that the DAC does not have an internal register so it doesn' | Now whats important to note is that the DAC does not have an internal register so it doesn' | ||
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| - | Anyway, I hooked the logic analyzer up to B11 Pins 13 thru 6, which leaves off pins 5 and 4, which means you lose the last two bits of accuracy. I'm not sure if it is important at this point or not. That means the last two bits are always considered 0. The Saleae Logic software is pretty cool. You end up getting data that looks like this: | + | Anyway, I hooked the logic analyzer up to B11 Pins 13 thru 6, which leaves off pins 5 and 4, which means you lose the last two bits of accuracy. I'm not sure if it is important at this point or not. That means the last two bits are always considered 0. The Saleae Logic software is pretty cool. You end up getting data that looks like this:\\ |
| + | \\ | ||
| ===== Major Challenges ===== | ===== Major Challenges ===== | ||
