The DiamondScan is one of the few VGA-type multisync monitors that has a composite video input, and that made it relatively common for use on the Amiga (although I believe that Mitsubishi no longer makes this model). The official scan rates cover the range from 15.6 kHz to 36 kHz, so the DiamondScan should work with all normal Amiga video modes. User controls are standard knobs and buttons, and there are no digital memory features, so using it with the Amiga means that you have to juggle the monitor's picture location settings along with the Amiga overscan and screen position settings. The DiamondScan works fine with the Amber board (see Boards/A2320 'Amber' Reference).
One feature of the DiamondScan is particularly applicable to the video production uses of the Amiga: the "Composite/RGB Select" (pin 22) on the DB25 input. Connect this pin through a switch to ground, and then a flip of the switch will select composite video or analog RGB display without reaching for the switches on the back of the monitor.
Specifications
Sync Frequency: 15.6 kHz to 36 kHz Horizontal
45 Hz to 90 Hz Vertical
Resolution: Maximum 800 x 560 (Rated...normally considered to be an 800x600 monitor.)
Input Connectors
BNC (Composite Video)
DB9 (EGA/CGA/Mono TTL) (DB9-to-DB9 cable was included.)
DB25 (Analog RGB)
Pin-Outs
DB9: (For TTL 16-Color CGA)
Pin 1: Ground
Pin 2: Unused
Pin 3: Red Video
Pin 4: Green Video
Pin 5: Blue Video
Pin 6: Intensity
Pin 7: Unused
Pin 8: Horizontal Sync
Pin 9: Vertical Sync
DB9: (For TTL 64-Color EGA)
Pin 1: Ground
Pin 2: Secondary Red Video
Pin 3: Primary Red Video
Pin 4: Primary Green Video
Pin 5: Primary Blue Video
Pin 6: Secondary Green Video/Intensity
Pin 7: Secondary Blue Video
Pin 8: Horizontal Sync
Pin 9: Vertical Sync
DB9: (For TTL Mono)
Pin 1: Ground
Pin 2: Unused
Pin 3: Unused
Pin 4: Unused
Pin 5: Unused
Pin 6: High Intensity
Pin 7: Video
Pin 8: Horizontal Sync
Pin 9: Vertical Sync
DB25:
Pin 1: Sync Ground
Pin 2: Red Video
Pin 3: Red Video Ground
Pin 4: Green Video
Pin 5: Green Video Ground
Pin 6: Superimpose Control (YS)
Pin 7: Superimpose Ground
Pin 8: Video Input Select (AV)
Pin 9: Composite Video Input
Pin 10: Composite Video Ground
Pin 11: Composite Video Out
Pin 12: Composite Video Ground
Pin 13: PGA Mode Control
Pin 14: Blue Video
Pin 15: Blue Video Ground
Pin 16: Horizontal/Composite Sync
Pin 17: Vertical Sync
Pin 18: Unused
Pin 19: Unused
Pin 20: Unused
Pin 21: INT (+5V ???)
Pin 22: Composite/RGB Select (TTL level: Low for RGB, high or
open for composite.)
Pin 23: Analog/TTL Select (TTL level: Low for TTL, high or open
for analog.)
Pin 24: Remote (TTL level: Low to disable Mode Switch.)
Pin 25: Shield Ground