packages were used, depending on the I/O pin-count requirements of a particular module design. Derivatives Ford created the Ford Microelectronics facility in Colorado Springs in 1982 to propagate the EEC-IV family, develop other custom circuits for use in automobiles, and to explore the Gallium Arsenide integrated circuit market. Parts in that family included the 8063, which never reached production. The family also included the 8065, produced in high volumes, which incorporated a memory controller allowing it to address a 1-megabyte memory, considerably greater than the 64K of the 8061 and 8096. The 8063, 8065 and later EPIC were CMOS derivatives capable of reduced power consumption. The 8065 had an enhanced instruction set, additional register space, and a much-enhanced I/O. As a result, the 8065 had a register file from address 0020H to 03FFH, addressable in 4 banks. I/O addresses were from 0002H to 001FH. The stack pointer was at 00020H. HSI The 8061 had an 8-channel event-capture system for measuring and timing pulsed inputs. A 16-bit timer value was captured in a FIFO along with the new state of all 8 pins whenever a transition was detected on an enabled pin. The FIFO was implemented in a small dynamic RAM. The HSI was used, for example, for recording times of crankshaft-position-sensor events, which were used for determining engine speed. HSO The 8061 had a 10-channel pulse-generator output system for generating timed outputs. This essentially had a small content-addressable memory (CAM) that compared event times with the same 16-bit timer used for the HSI system. Each event time was written to CAM along with a command. When a match of a CAM location with the timer was found, the event was executed and the CAM location returned to an empty pool. The CAM was simulated with dynamic RAM and a comparator. The HSO was used for a variety of purposes including fuel injection pulse timing. ADC The 8061 and its derivatives had a multichannel analog-to-digital converter on the processor chip. This was used for such purposes as sensing engine temperature and throttle angle, and for reading the exhaust-gas oxygen sensor. Interrupts The 8061 had an 8-channel vectored priority interrupt system. The later 8065 provided 40 channels, of which 32 were tied into the HSI/HSO event system. Serial Port Various members of the 8061 family had a custom serial port on-chip. This was intended as a port expander and not as a