output devices

Output devices Bit-mapped displays and Video RAM: Bit-mapped display map video RAM onto the VDU, the number of pixels determines the resolution and the number of bits per pixel determines the dimensions of the color. Typically 8-bits are pretty good. But the colors may be limited to 256 shades per pixel, whereas with a 24-bit output we could have well over 16,000,000 colors per pixel, this however would take up a huge amount of RAM. This is …

…of 5.75 Megs. Compression with Printers and Networks: Compression plays a significant role with printing and networking, primarily because with a printer we get a max throughput of about 1.9 Mbps; and with a USB (Universal Serial Bus) it’s even lower at 1.5 Mbps. Compression would greatly increase efficiency and speed. In the networking field, Dial-ups etc, move on slow 56 Kbps or even 33.6 Kbps connections, hence with such slow data transfers its essential to have compact data.