color_computer_3:gime:ff98
$FF98 (65432) Video Mode Register – VMODE
Note: Some of these resolutions are not actually possible to display
| Bits | ID | Description |
|---|---|---|
| 7 | BP | 0 = Text Mode, 1 = Graphics Mode |
| 6 | * | Unused |
| 5 | BPI | 1 = Burst phase inverted (Artifact Colors) * * |
| 4 | MOCH | 1 = Monochrome |
| 3 | H50 | 0 = 60 Hz Vertical Sync, 1 = 50 Hz Vertical Sync |
| 2-0 | LPR2-0 | Lines Per Row (Adjusts Vertical Resolution |
*Undocumented
* *Set to 1 when the F1 key is used when powering on the CoCo 3.
| Bits 2-0 : Lines Per Row (LPR) | Description |
|---|---|
| 000 | 1 line per row |
| 001 | 2 line per row |
| 010 | 3 lines per row * |
| 011 | 8 lines per row |
| 100 | 9 lines per row |
| 101 | 10 lines per row |
| 110 | 11 lines per row |
| 111 | 1 row ONLY * * |
* Testing has not found any working screen mode with this value
* * Screen mode has only 1 row of pixels that runs from top to bottom of the screen.
color_computer_3/gime/ff98.txt · Last modified: 2023/10/28 03:33 by trs-eric