The SB8010 is a highly versatile SBC
comprised of a Z-80 microprocessor, 4 general purpose 28 pin sockets for
byte-wide ROM and/or RAM chips, a Z-80 CTC counter-timer, and a serial I/O port
(UART) using Intel's 8251. A bootstrap option is provided for loading an
operating system into main memory using an on-board PROM.
Key Features
On-board memory can be mapped in various ways to match the memory chips
selected. The mapping options are accomplished using a PROM. The user may
install his won PROM if a different mapping is desired. However, the
six mappings provided should satisfy most users
The serial I/O chip uses the counter-timer chip as the clock source for
both receiver and transmitter to that baud rate is programmable by software.
RS232 buffers are provided for all the serial outputs and inputs. In an
interrupt driven system, the serial chip (8251) uses the CTC as an interrupt
controller, enabling the serial chip (8085 peripheral) to benefit from the
sophisticated Z-80 interrupt scheme.
The CTC can also be used as an interrupt controller for external events as
well as a general purpose counter and / or timer.
