A13 and A12 are also at 00, so line 0 from decoder D2 is low, enabling system ROM. The rest of the address ... When and why the control unit would decode a specific memory location is a subject that is discussed in Chapter 13. For now, it isanbsp;...
|Title||:||Microcomputer Operation, Troubleshooting, and Repair|
|Author||:||Robert T. Paynter|
|Publisher||:||Prentice Hall - 1986|