Intel SDK-85: Part 1 (What have I got?)
7I've got a pair of MCS-85 System Development Kits (SDKs) for the Intel 8085 microprocessor. The 8085 was an improvement on the 8080, using the same instruction set but only requiring a +5VDC supply (hence the "5" in "8085") - the 8080 required +/-5V and +12V required by the 8080. It also included some additional functionality, requiring less support chips. It never became popular as a CP/M microprocessor, with the Z80 winning that skirmish.
These kits are essentially a single-board computer for the 8085. The standard kit comes with 256 bytes of RAM (8155) and a 2KB monitor ROM (8355). It can be expanded to 512 bytes of RAM with an additional 8155 and a utilities ROM (8755 or 8755A).
One doesn't appear to work (nothing on the display) whereas the 2nd boots and appears to have an EPROM programmer ... ? There's a D2186 8K static RAM and a pair of X2816 2KB EEPROMs, one in a ZIF socket. Will investigate further.
I've also got a bunch of books on the SDK-85 and 8085. It's possible to add an RS232 and cassette interface.
In this video I simply put some feet on the board, add some IC sockets and install the SDK-85 Utilities ROM (8755A) and an additional 256 bytes (8155).