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SUMO
UM8312
Double Row Buffer(DRB)
Features
• Low cost solution to CRT memory contention problem • Provides enhanced processor throughput for CRT
display systems • Replaces shift registers or several RAM and counter
IC's in CRT display system • Permits display of one data row while next data row is
being loaded • Data may be written into buffer at less than the video
painting rate • Double data row buffer permits second data row to
be loaded anytime during the display of the preceding data row
• Permits active video 'on all scan lines of data row • Dynamically variable numbe~ of characters per data
Row-... 64, 80, 132, ....