An EPROM programmer for the ET3400 expansion system

An EPROM programmer has been constructed that can program 2716 type 2K by 8 bit and 2532 type 4K by 8 bit EPROMs. Expansion to 8K by 8 bits EPROMs is possible. The EPROM programmer is used as a peripheral device to the ET3400 Microcomputer Trainer Expansion system. Data to be programmed may be down line loaded from a host system or read in from another ROM or EPROM. The EPROM programmer software can program an EPROM, verify that programming was correct, read a ROM or EPROM, check for correct erasure and fill an area of memory with OxFF.