摘要 |
A microprocessor system with high order capabilities is provided with the two non-volatile memories which are read-only-memories (ROMs) in the disclosed embodiment. A first ROM stores the microcode for controlling the operation of the microprocessor circuits. The second ROM, which is preferably disposed in a module or cartridge, stores a plurality of program codes which are used to address the first ROM. The second ROM's module may be inserted into a receptacle for interconnecting it with the remainder of the microprocessor system. Preferably, a plurality of such second ROMs are available for selectively plugging into the microprocessor system.
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