Il Chip grafico D7220D in tecnologia NMOS, era montato su alcune stazioni DEC, tra le quali il DEC Rainbow 100, NCR DMV. Caratteristiche : Microprocessor Interface DMA transfer with 8257 or 8237 ...

Leggi il Tiiip completo

(Invia il tuo commento)

Il Chip grafico D7220D in tecnologia NMOS, era montato su alcune stazioni DEC, tra le quali il DEC Rainbow 100, NCR DMV.

Caratteristiche :

Microprocessor Interface

• DMA transfer with 8257 or 8237 controllers
• FIFO Command Buffering

Dispaly Memory Interface :

• Up to 256k words of 16 bits
• Read-Modify-Write (RMW) Display ;emory cicles in under 800ns
• Dynamic RAM refresh cycles for nonaccessed memory

Light Pen Input

External video syncronization mode

Graphics mode

• Four megabit, bit- mapped display memory

Character mode

• 8k character code and attribute display memory

Mixed Graphics and Character Mode

• 64k if all characters
• 1 megapixel if all graphics

Graphics Capabilities

• Figure drawing of lines, arc/circles, rectangles and graphics characters in 800ns per pixel
• Display 1024 by 1024 pixels with 4 planes of color or grayscale
• Two independently scrollable areas

Character Capabilities

• Auto cursor advance
• Four independently scrollable areas
• Programmable cursor height
• Characters per row : up to 256
• Characters row per screen : up to 100

Video Display format

• Zoom magnification factors of 1 to 16
• Panning
• Command settable video raster parameters

Technology

• Single +5v NMOS 40-in DIP

DMA Capability

• Bytes or word transfers
• 4 clock periods per byte transferred

 

 

 

 

Iscriviti per poter valutare questo oggetto, le sue recensioni e per contribuire a Tiiips.Valuta