GVP EGS 28/24 Spectrum

RTG graphics card 
    Cirrus Logic GD5426 or GD 5428 (VL bus) 
    85 MHz in 8 bit modes 
    45 MHz in 16 bit 
    28 MHz in 24 bit 
    15-75 kHz horizontal frequency 
    up to 200 Hz vertical frequency 
    1 or 2 MB 70 ns DRAM 
    four 512 kB chips in SOJ package 

screen modes 
    1600×1280×8 interlace 
    1152×864×16 interlace 
    800×600×24 non-interlace 

notes 
•    video signal passthrough, automatic monitor switching 
•    HD15 output and RB9 input connectors 
•    Zorro II / III autosensing 
•    Picasso96, CyberGraphX 2, 3 & 4 and EGS drivers