Control Page: Difference between revisions
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{| class="wikitable" | {| class="wikitable" | ||
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! 0 !! 1 !! 2 !! 3 !! 4 !! 5 !! 6 !! 7 !! 8 !! 9 !! A !! B !! C !! D !! E !! F | ! 0 !! 1 !! 2 !! 3 !! 4 !! 5 !! 6 !! 7 !! 8 !! 9 !! A !! B !! C !! D !! E !! F | ||
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| Line 39: | Line 40: | ||
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! 8x | ! 8x | ||
| - || - || - || - || - || - || - || - || - || - || - || - || - || - || - || - | | class="scroll_x0" | - || class="scroll_x0" | - || class="scroll_y0" | - || class="scroll_y0" | - | ||
| class="scroll_x1" | - || class="scroll_x1" | - || class="scroll_y1" | - || class="scroll_y1" | - | |||
| class="scroll_x2" | - || class="scroll_x2" | - || class="scroll_y2" | - || class="scroll_y2" | - | |||
| class="scroll_x3" | - || class="scroll_x3" | - || class="scroll_x4" | - || class="scroll_x4" | - | |||
|- | |- | ||
! 9x | ! 9x | ||
Revision as of 18:19, 13 January 2024
The Control Page is a page of memory that is devoted to connecting to other parts of NerdConsole. All of the other systems that can be addressed are collected in the Control Page to ensure the maximum amount of contiguous available memory. The Control Page gives access to the controllers, audio, user port (if available), RAM and ROM banking, and the graphics system.
Control Page Map ($02xx)
| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | A | B | C | D | E | F | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0x | R | W | W | W | W | W | W | W | - | - | - | - | - | - | - | - |
| 1x | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 2x | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 3x | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 4x | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 5x | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 6x | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 7x | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 8x | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 9x | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Ax | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Bx | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Cx | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Dx | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Ex | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Fx | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
Key
| Color | Address | Description |
|---|---|---|
| $0200 | Input Latch/Clock | |
| $0201 | Input Data | |
| $0202 | Audio Address Flag | |
| $0203 | Audio Address/Data | |
| $0204 | Main RAM Select | |
| $0205 | Extended RAM Select | |
| $0206 | Low ROM Select | |
| $0207 | High ROM Select | |
| $0280 - $0281 | X Scroll (BG0) | |
| $0282 - $0283 | Y Scroll (BG0) | |
| $0284 - $0285 | X Scroll (BG1) | |
| $0286 - $0287 | Y Scroll (BG1) | |
| $0288 - $0289 | X Scroll (BG2) | |
| $028A - $028B | Y Scroll (BG2) | |
| $028C - $028D | X Scroll (BG3) | |
| $028E - $028F | Y Scroll (BG3) |
