Dennis Bernardo D'Annunzio

My main current project is a S-100/IEEE696 replica computer. The initial version has all new-built boards, a modern power supply, a new card cage and enclosure. I am currently building and testing the board set (including the baseboard). Below are some outlines of my current project and thoughts. I hope to contribute more in the future as things progress and time permits (images, text docs, eda docs, etc.)

  - Board Set Build and Test (in progress)
      - S100 Z80 SBC
      - S100 Propeller based I/O (rear panel)
      - S100 V4 Baseboard
      - S100 Monitor (front panel)
  - Enclosure Design (SW or PRO/E) (in progress)
      - Card Cage
      - PS Cage
      - Main Case/Chassis
      - Front Panel
      - Rear Panel
      - Designed within the constraints of available machining tools
  - Software Setup/Work (from S100)
      - Monitor ROM (from S100)
      - CP/M BIOS and setup (CF on SBC)

Once the computer is completed, I am interested in using the computer for a few projects. The enclosure work will take the longest, but I can start using the computer once the board set is completed and tested. I have a lot of experience with Atmel ATMEGA uC and hope to put some of these devices inside an S100.

  - **MIDI interface **- leverage the realtime capability of the S100 system (without interrupts) to create a tight MIDI sequencer
      - Features and UI similar to Roland MC50 and/or MC80
        - both of those have 2 line LCD interface that works well (no piano roll)
        - hardware UI with buttons and scroll wheel
      - ​Workstation and Live type functions
        - record/overdub
        - Looping
        - rhythm track
        - Multiple MIDI ports, programmatically assigned (in/out/merge/filter/etc.)
  - **FPGA Personality Driver for CPU (Master/Slave) Board**
      - Emulate one (or multiple) CPU boards, new or vintage
      - Emulate disk images
      - Use FPGA/Atmel ATMEGA combo core
      - Use Atmel for A/D (and D/A)
      - Use Atmel for user main loops after setup of FPGA, utilize RS232 interface or other between them.
      - Also possibly use Atmel chip for bootloader interface to S-100 bus (using SIO interface)
      - Direct bus to FPGA - FPGA for interface logic
      - i8080
      - i8085
      - i8086 (x86): i80186, i80286, i80386,i80486
      - z80
      - m6805
      - m68000?, etc.
      - specific mfg boards, from Cromemco, IMSAI, Ithaca?, etc.
  - **GPS RTC board**
      - Always correct, based on GPS time and GPS location
      - Possible DMA/memory mapped interfaces?
  - **Vacuum Tube System Monitor (front panel or external)**
      - programmable display
      - steampunk
      - References
        - [[http://tubes-store.com/index.php?cPath=32_93|http://tubes-store.com/index.php?cPath=32_93]]
  - **Touch screen System Monitor (front panel) **  (modern)
  - **Power supply telemetry**  (voltage, current, temps)
      - It's about time RFU was used, eh? How about an i2c bus?
  - (bluesky) **Baseboard **  upgrade with **per-slot power supply telemetry**  (voltage, current)
  - (bluesky) **Baseboard **  upgrade with **programmable per-slot power supply voltages and telemetry**
      - **​**  It's about time RFU was used, eh? Ethernet/twisted pair - wist traces on PCB as necessary, slot interconnect interleave