Retina 1.1 Graphics Card

RTG graphics card

NCR 77C22E+

90 MHz max pixel clock 70 MHz in 8 bit modes 25 MHz in 24 bit modes 15-75 kHz horizontal frequency 50-100 Hz vertical frequency

1, 2 or 4 MB DRAM, page mode, segmented, 70-80 ns sixteen ZIP sockets

1 MB setup: every second socket (1, 3, 5, 7...) is populated with a 256k×4 chip (414256) 2 MB setup: every socket is populated by a 256k×4 chip (414256) 4 MB setup: every second socket (1, 3, 5, 7...) is populated with a 1M×4 chip (414400)

screen modes

2400×1200×8 interlace 1280×1024×16 non-interlace 1024×768 non-interlace

notes

optional external composite encoder - gives television style video output optional video encoder - S-VHS and composite outputs HD15 VGA connector EGS and RetinaEmu drivers supported by NetBSD (except for X server) and OpenBSD