The Apple 21-inch (2-page) monochrome display (model # M0402 or M1025 -- M0402 is revision A of the 21-inch monochrome display, M1025 is revision B) can be used on Power Macintosh 6100AV, 7100, 7100AV, 8100, and 8100AV series computers with either the HP Video Card (standard video card on the 7100 and 8100) or with the AV Video Card. It is not compatible with the built-in HDI-45 video ports used on these Power Macintosh computers.
The Apple 21-inch monochrome display also works with the Power Macintosh 7200, 7500, 8500, and 9500 series computers.
The Apple 21-inch monochrome display also works with the Power Macintosh G3 CPUs. In some cases when connected to a G3, the display may experience a blank screen upon startup possibly followed by a high-pitched whine. If so, simply turn the display off and back on again to achieve proper video synchronization.
A DB-15 to DB-25 adapter cable (590-0615) is required with any of these models. The number of shades of gray that are supported are black and white, 4, 16, and 256.