The Apple I used a MOS Technologies 6502 microprocessor running at , and its design was based largely on Wozniak's previous work centered around a Motorola 6800. The unconventional clock speed was chosen to be a fraction () of the NTSC color carrier, which simplified video circuitry. of memory was included on the base machine, which was expandable to on-board and up to by using an add-on card. On-board memory utilized newly available 4Kbit DRAM chips, and was designed to be upgradeable to the next generation of 16Kbit chips for a maximum of on-board memory.Apple I advertisement Oct 1978 An optional $75 plug-in cassette interface card allowed users to store programs on ordinary audio cassette tapes. A BASIC interpreter, originally written by Wozniak, was provided with the cassette interface that let users easily write programs and play simple games. An onboard AC power supply was included.
The Apple I used a MOS Technologies 6502 microprocessor running at  and its design was based largely on Wozniak's previous work centered around a Motorola 6800 The unconventional clock speed was chosen to be a fraction () of the NTSC color carrier which simplified video circuitry of memory was included on the base machine which was expandable to on-board and up to by using an add-on card On-board memory utilized newly available 4Kbit DRAM chips and was designed to be upgradeable to the next generation of 16Kbit chips for a maximum of on-board memoryApple I advertisement Oct 1978 An optional $75 plug-in cassette interface card allowed users to store programs on ordinary audio cassette tapes A BASIC interpreter originally written by Wozniak was provided with the cassette interface that let users easily write programs and play simple games An onboard AC power supply was included