Dyno Computer

The Dyno Computer Motherboard is the foundation of the project. It provides all of the functionality of a complete computer to run the ROMWBW software environment and allows for expansion via its Dyno•Bus slots. The motherboard features:

• A Zilog Z180 CPU running at 18.432 MHz,
• Two asynchronous serial ports accessible via TTL-levels or RS-232,
• ROMWBW-compatible memory with 512 MB of ROM (Flash) and 512 MB of battery-backed up RAM managed by the Z180 MMU,
• Real-Time Clock with support for CPU reset at power-up and watchdog monitoring,
• Support for 8- and 16-bit IDE storage devices (i.e., Compact Flash, Hard Drive and Disk On ROM),
• Uses ATX power supply with soft controls,
• A system register that controls SPI addressing, a beeper and software-control to reset or shutdown the computer, and
• Six Dyno•Bus expansion slots.

The Dyno•Bus provides access to:

• The 8-bit data bus;
• The 20-bit address bus;
• The Z180 control signals: (RD, WR, MREQ, IORQ, M1, WAIT and RESET;
• The Z180 bus mastering signals: BUSRQ and BUSAK;
• The Z180 DMA signals: DREQ1 and TEND1;
• The Z180 clock signals: PHI and CLK;
• The Z180 interrupt signals: INT0, INT1, INT2 and NMI as well as the interrupt cascading signals IEI and IEO;
• The Z180 CSIO signals: CKS, RXS and TXS as well as the slot selection signal: SEL for SPI emulation; and
• I²C signals: SDA and SCL.