ocr: 7.3 ELECTRICAL SPECIFICATIONS I/0 Ports (FO,P2..P7) These Ports are capable of driving UP to four. TTL type e loads each in output confisuration. Buffereo Reset (/BRESET) The buffered reset line is capable of drivins at least one TTL level load. It can drive a total of ten TTL loads between the User Porti the Serial Porti and the Expansion Port Attention (ATN) This line is capable of driving at least one TTL level load. It can drive a total o? ter TTL loads between the User Port and the Serial Porti Recieve Data (RxD) The Recieve Data input may be criven by a single TTL vel driver. Other Ineut ...