Commodore 128 / 128D RGBI
9 pin D-sub female (D9F) at the computer.
Output signals:
| Signal | Level | Impedance |
| Red | TTL | TTL |
| Green | TTL | TTL |
| Blue | TTL | TTL |
| Intensity | TTL | TTL |
| HSync | TTL | TTL |
| VSync | TTL | TTL |
| Composite | 75 ohm | |
| Full Intensity | 2.0 V | |
| Half Intensity | 1.5 V | |
| Sync | 0.5 V |
Source: Commodore 128 User Manual, Commodore 128 Programmer's Reference Guide
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