Use the LEDs
How to Use the LEDs
LED availability
Here's a chart for the availability of the LEDs for the 4 machines
| LED Name | F256 Jr. | F256 Jr.2 | F256K | F256K2 |
|---|---|---|---|---|
| Power | yes | yes | yes, RGB | yes, RGB |
| L0 status | yes | yes | yes | yes |
| L1 status | yes | yes | yes | yes |
| SD Card Access | yes | yes | yes, RGB | yes, RGB |
| Caps Lock | no | no | yes, RGB | yes, RGB |
| Network | no | no | no | yes, RGB |
L0 and L1 are status LED on the board itself. (to do: state their normal purpose in this page)
System Control Register 0 at 0xD6A0
Here's the register that can let you assume manual control for the LEDs. In order to take control of a given LED, set the appropriate bit to 1.
| Address | R/W | Name | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
|---|---|---|---|---|---|---|---|---|---|---|
| 0xD6A0 | W | SYS0 | RESET | NETW_LED | CAPLOCKS_LED | BUZZ | L1_LED | L0_LED | SD_LED | PWR_LED |
System Control Register 1 at 0xD6A1
This register can control the behavior of the onboard L0 and L1 LEDs
| Address | R/W | Name | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
|---|---|---|---|---|---|---|---|---|---|---|
| 0xD6A1 | W | SYS1 | L1_RATE1 | L1_RATE0 | L0_RATE1 | L0_RATE0 | SID_ST | PSG_ST | L1_MN | L0_MN |
If L1_MN, L0_MN are set, they are under manual control. This allows to manually turn them on or off using the SYS0 register at 0xD6A0. If they are cleared, they will flash according to the L1_RATE and L0_RATE settings.
| RATE1 | RATE0 | Rate |
|---|---|---|
| 0 | 0 | 1s |
| 0 | 1 | 0.5s |
| 1 | 0 | 0.4s |
| 1 | 1 | 0.2s |
LED Color Registers on the K and K2
Set these RGB byte values for every LED other than L0 and L1. Note that these registers are Write only. The color will only change if you assumed manual control of these LEDs using the corresponding SYS0 system control register bits above.
| LED Name | Red register | Green register | Blue register |
|---|---|---|---|
| Power | 0xD6A7 | 0xD6A8 | 0xD6A9 |
| SD Access | 0xD6AA | 0xD6AB | 0xD6AC |
| Caps Lock | 0xD6AD | 0xD6AE | 0xD6AF |
| Network (K2 only) | 0xD6B3 | 0xD6B4 | 0xD6B5 |
