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Intel 8080
A massively popular and influential 8-bit microprocessor originally released in 1974. Among other uses, it powered the Altair 8800.
Architecture
The 8080 has the following registers:
| 15…8 | 7…0 | |
|---|---|---|
| A | F | PSW |
| B | C | B |
| D | E | D |
| H | L | H |
| SP | ||
| PC | ||
Flags register:
| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
|---|---|---|---|---|---|---|---|
| S | Z | 0 | A | 0 | P | 1 | C |
Like its descendants, the 8080 stores addresses in little-endian format and has a stack that grows downward.