DevNotes
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NOTE : that by the time 0xCC gets to the real hardware, it has been reduced to just 0x0C which is an 'H' character. | NOTE : that by the time 0xCC gets to the real hardware, it has been reduced to just 0x0C which is an 'H' character. | ||
Therefore, I have strong reason to believe that on Space Ace, the 'H' character cannot be displayed on the scoreboard in the places mentioned above in the 'alternate function' column. | Therefore, I have strong reason to believe that on Space Ace, the 'H' character cannot be displayed on the scoreboard in the places mentioned above in the 'alternate function' column. | ||
| + | |||
| + | == Time Traveler Notes == | ||
| + | (from a chat with Mark B) | ||
| + | |||
| + | oh cool, the "schematics" on DLP has a PCB layout (though no real schematics) | ||
| + | looks like it says the UART is a PB2050 or P82050 | ||
| + | the board looks really simple | ||
| + | and there is a secondary PCB call "display" that has 8 Alphanumeric devices on it | ||
| + | that must be the "RAM GOOD" display area | ||
| + | there are two on it called 2c55a which I think are parallel port chips | ||
| + | then there is a max232 which I think is the RS232 driver | ||
| + | then the CPU and UART | ||
| + | some RAM and ROM | ||
| + | and that's about it | ||
Latest revision as of 03:10, 3 February 2010
The Space Ace Annunciator
I have done some work on the scoreboard code for Daphne recently (well at least, recently at the time of this writing) and I found that I had to relearn how the so-called annunciator board works in conjunction with the Space Ace ROMs and the scoreboard. Here's the scoop:
The Space Ace ROMs sends values of 0xCC to the following addresses:
| Address | Annunciator Description | Alternate Function |
| 0xE03B | enable Ace skill LED | player 1 digit 3 |
| 0xE03D | enable Captain skill LED | player 1 digit 5 |
| 0xE03E | enable Cadet skill LED | player 1 lives |
| 0xE03F | clear all LED's | player 2 lives |
NOTE : that by the time 0xCC gets to the real hardware, it has been reduced to just 0x0C which is an 'H' character. Therefore, I have strong reason to believe that on Space Ace, the 'H' character cannot be displayed on the scoreboard in the places mentioned above in the 'alternate function' column.
Time Traveler Notes
(from a chat with Mark B)
oh cool, the "schematics" on DLP has a PCB layout (though no real schematics) looks like it says the UART is a PB2050 or P82050 the board looks really simple and there is a secondary PCB call "display" that has 8 Alphanumeric devices on it that must be the "RAM GOOD" display area there are two on it called 2c55a which I think are parallel port chips then there is a max232 which I think is the RS232 driver then the CPU and UART some RAM and ROM and that's about it
