Chuck Peddle joined the design team in 1973 after the 6800 processor design was done but he contributed to overall system design and to several peripheral chips, particularly the 6820 ( PIA ) parallel interface.
42.
The 64-bit parallel interface requires difficult trace routing, because, as with all parallel interfaces, the signals from the bus must arrive simultaneously or within a very short window, and noise from adjacent slots may cause interference.
43.
The 64-bit parallel interface requires difficult trace routing, because, as with all parallel interfaces, the signals from the bus must arrive simultaneously or within a very short window, and noise from adjacent slots may cause interference.
44.
Older Macs will have a SCSI port ( pronounced " scuzzy " and sometimes used on PCs as well ) on the back; it is a wide, 25-pin connector that serves as the parallel interface for Macs.
45.
IBM's original MDA included a parallel printer port ( hence its original name of " Monochrome Display and Printer Adapter " ), thus avoiding the need for a separate parallel interface on computers fitted with an MDA.
46.
The MAC may be linked to the PHY by a four-bit 25 MHz synchronous parallel interface known as a media-independent interface ( MII ), or by a two-bit 50 MHz variant called reduced media independent interface ( RMII ).
47.
Early interface models ( such as the " Serial Printer Interface " and " Graphics Printer Interface " ) simply convert from Commodore's serial format to the more standard Centronics parallel interface, with only minimal ASCII conversions and graphic character printing.
48.
Later ( near the end of the PET's lifespan ), single-unit 2031 and SFD-1001 drives were produced that used the same case as the 1540 / 1541, but sported the PET's parallel interface instead of the VIC-20 / C64 IEC interface.
49.
When IBM implemented the parallel interface on the IBM PC, they used the DB-25F connector at the PC-end of the interface, creating the now familiar parallel cable with a DB25M at one end and a 36 pin micro ribbon connector at the other.
50.
Some of the printer's features are 20 megabytes ( MB ) of memory, a three pages per minute in full colour ( 12ppm for black and white ) print engine; A4, B5 and executive paper sizes support, and a standard IEEE-1284 bi-directional parallel interface.
