21. These models have 2 additional data bus wires to the EEC-IV diagnostic connector ). 22. The SDRAMs used are 16 bits wide and have separate address and data buses . 23. The backplane served as the address bus and the ribbon cable as the data bus . 24. The only way out is to board the data bus and help fix the mess. 25. Use of the data bus is intricate and thus requires a complex DRAM controller circuit. 26. Buses don't need to be just the traditional address or data bus directly linked pins. 27. Data bus systems aren't nearly as sexy as superfast processors or hulking great hard drives.28. The company moved from a proprietary data bus architecture in favor of IBM's PRISM line. 29. A 16-bit data bus also required twice as many memory chips as an 8-bit one. 30. I / O operations can slow memory access if the address and data buses are shared.
