27 May 2023 - 02 June 2023

1. MIT OCW
- 1.1. 18.03sc (differential equations).
  - 1.1.1. Unit II - Characteristic Equation
2. San Jose fence
- 2.1. Mounted post
3. wktcolor
4. wktpqb
5. Compilers
- 5.1. Started hand written WSN parser
6. Mill Controller #2
- 6.1. Mounted on mill - ready or testing
- 6.2. Need to investigate new HW/SW for eventual replacements
  - 6.2.1. Old crap ain't gonna last forever
  - 6.2.2. Buildroot/Linux 5.15 PREEMPT + latency tools
- 6.3. Alternative architecture
  - 6.3.1. Split off stepper motor controller to separate board
  - 6.3.2. Use emc2 MODBUS/TCP protocol for stepper and other IO
7. Alum Rock Data Center
- 7.1. need to check rocky, others? (arch?) for suitability
- 7.2. recheck ALMA, now that CERN and Fermilab are using it
- 7.3. Sonic.net has announced that Fiber connectivity is coming to my house
- 7.4. The end of DSL and static IP addresses as I know it
- 7.5. Need a VPS with static IP
8. CA Root Key Generation
- 8.1. Need to be clear on security properties.
- 8.2. Simple hardware.
- 8.3. USB Serial interface only but no credentials across USB I/F.
- 8.4. Use Sneakernet
- 8.5. Beagleboard
- 8.6. LCD Touchscreen
- 8.7. Morse code PIN
- 8.8. Encrypted Filesystem
9. Virtual Orchestra
- 9.1. sfz file tests
  - 9.1.1. need tooling to edit sample files
- 9.2. increasingly skeptical whether quality results are possible
- 9.3. maybe should treat as platform for concatinative synthesis
- 9.4. maybe should just accept the limitations and work with it
10. gat
- 10.1. spectrogram done - matches 'octave' output
11. RIOT drivers
- 11.1. WS2801
- 11.2. Velleman KA03
- 11.3. Velleman KA05
12. mcd05 32 button/led box
- 12.1. Recovered schematics.
- 12.2. Planning software.
- 12.3. Received STM32F767 Nucleo144 with Ethernet.
13. AMD 2900 bitslice computing
- 13.1. Probably my oldest uncompleted project
- 13.2. Exploring possibilities for something constructive
14. Hitachi HD68B09E CPU
- 14.1. RAM/UART/IO
- 14.2. Started schematic
  - 14.2.1. Standard peripheral set for 8 bit CPU bringups
- 14.3. Arduino Mega 2560 DMA loader
- 14.4. Generate quadrature clock directly
- 14.5. Full Bus SW Emulation infeasible
15. Rockwell R65F11
- 15.1. Still evaluating.
- 15.2. Dev board
16. PLD programming
17. EPROM Programming
18. POSIT
19. MAME
- 19.1. Subset builds in debug mode
- 19.2. gs6809 serial IO doesn't work right with PTY and other streams
- 19.3. ampro (Z80/Z80SIO) does work with PTY
- 19.4. Evaluating what is needed for other emulators.
20. More project ideas
- 20.1. Zuse Z3 simulation in Verilog
- 20.2. GMPForth ports to simulators
- 20.3. GMPASM assembler
- 20.4. Extracting ISO Superboard Forth ROMS for MAME emulation
- 20.5. 'bwocl' OpenCL tooling
  - 20.5.1. Offline compilation
  - 20.5.2. Standard Kernel Running
- 20.6. hardware support for classic 5V CPUs
- 20.7. Existing 'retro' hardware still working?
21. David Davies
- 21.1. Broadcom BCG? Employee indicted for running a brothel.
- 21.2. New case C1923172, consolidated with 15 Parties.
- 21.3. Next hearing 6/20/2023

1. MIT OCW

1.1. 18.03sc (differential equations).

1.1.1. Unit II - Characteristic Equation

2. San Jose fence

North property line fence blew over in March windstorm. Collaborating with neighbor to fix the fence ourselves.

2.1. Mounted post

Need to redo, though.

3. wktcolor

https://github.com/daniel-kelley/wktcolor/issues/10

4. wktpqb

Continuing…

5. Compilers

5.1. Started hand written WSN parser

6. Mill Controller #2

6.1. Mounted on mill - ready or testing

6.2. Need to investigate new HW/SW for eventual replacements

6.2.1. Old crap ain't gonna last forever

6.2.2. Buildroot/Linux 5.15 PREEMPT + latency tools

First pass done - boots on real hardware

6.3. Alternative architecture

6.3.1. Split off stepper motor controller to separate board

Increase latency tolerance on controller

6.3.2. Use emc2 MODBUS/TCP protocol for stepper and other IO

7. Alum Rock Data Center

7.1. need to check rocky, others? (arch?) for suitability

7.2. recheck ALMA, now that CERN and Fermilab are using it

7.3. Sonic.net has announced that Fiber connectivity is coming to my house

7.4. The end of DSL and static IP addresses as I know it

Started with Northpoint communications in the late 1990's. I guess that's a good long run.

7.5. Need a VPS with static IP

7.5.1. OpenVPN to tie it all together

7.5.2. Gandi VPS datacenter in France so connection crosses international border

What are the data security and privacy tradeoffs?

7.5.3. Prototype VPS on existing hardware

8. CA Root Key Generation

Nice to have an appliance that manages keys. Could just buy something from nitrokey https://www.nitrokey.com/

8.1. Need to be clear on security properties.

Definitely protect against remote access to private keys. How strong does the protection against local access need to be?

8.2. Simple hardware.

8.3. USB Serial interface only but no credentials across USB I/F.

But this potentially exposes the hardware to remote access via the USB I/F when connected.

8.4. Use Sneakernet

Using "disk drive" IO introduces air gap - remote access impossible. Increases attack surface via filesystem manipulation.

8.5. Beagleboard

Found in SCZ. Thought it was in SJ.

8.6. LCD Touchscreen

Unlocks encrypted filesystem. Maybe not needed. See below.

8.7. Morse code PIN

Only need ONE button, and a pass/fail LED. Hardware will never go EOL (Thanks Elena!). Susceptible to remote audio recording of PIN button noise, which could be overcome by using 2FA. Again - what am I protecting against?

8.8. Encrypted Filesystem

9. Virtual Orchestra

9.1. sfz file tests

9.1.1. need tooling to edit sample files

9.2. increasingly skeptical whether quality results are possible

9.3. maybe should treat as platform for concatinative synthesis

9.4. maybe should just accept the limitations and work with it

One should not be disappointed that a guitar can't sound like a flute.

10. gat

10.1. spectrogram done - matches 'octave' output

11. RIOT drivers

Implemented - needs testing.

11.1. WS2801

11.2. Velleman KA03

11.3. Velleman KA05

12. mcd05 32 button/led box

12.1. Recovered schematics.

12.2. Planning software.

12.3. Received STM32F767 Nucleo144 with Ethernet.

12.3.1. Test program running.

12.3.2. Need to consider CoAP multicast discovery.

12.3.3. Consider simpler architecture with STM32F767 as a 'hub'.

12.3.4. Consider CAN interface to hub.

13. AMD 2900 bitslice computing

13.1. Probably my oldest uncompleted project

13.2. Exploring possibilities for something constructive

Create verilog models for 2903/2910 and verify against hardware?

14. Hitachi HD68B09E CPU

14.1. RAM/UART/IO

14.2. Started schematic

14.2.1. Standard peripheral set for 8 bit CPU bringups

Board schematic planned - need Kicad symbols

14.3. Arduino Mega 2560 DMA loader

…Along with standard 8 bit loader

14.4. Generate quadrature clock directly

14.5. Full Bus SW Emulation infeasible

6809 1000ns maximum cycle time too short

15. Rockwell R65F11

15.1. Still evaluating.

15.2. Dev board

Reverse engineered some of a mostly fully built development board with one part missing. As near as I can tell, that one part is some sort of programmable address decoder with a pinout that does not correspond to any part I can find. Kind of like a GAL but with inputs on top and outputs on bottom (as opposed to left and right in a standard GAL). I have no idea what the provenance of this board is and if it ever worked.

16. PLD programming

Looks like Atmel 16V8 is the last 5V PLD part left standing. Maybe not surprising that there still doesn't appear to be a fully open source tool chain for programming. How hard could it be? (!) Could next-pnr generic help? Might be easier to use espresso for logic array and program output logic bits directly for simple stuff.

17. EPROM Programming

Found some software for Needham programmer. Need to check electrolytic caps on ISA board.

18. POSIT

Use POSITs for YRX?

19. MAME

19.1. Subset builds in debug mode

Full debug fails - not enough disk or memory.

19.2. gs6809 serial IO doesn't work right with PTY and other streams

19.3. ampro (Z80/Z80SIO) does work with PTY

19.4. Evaluating what is needed for other emulators.

20. More project ideas

20.1. Zuse Z3 simulation in Verilog

Good excuse for floating point ALU design. Try posit format?

20.2. GMPForth ports to simulators

20.2.1. SIMH for some targets (vax)

20.2.2. MAME looks interesting for microprocessor system emulations

How to support ersatz systems?

20.2.3. Ports to classic figFORTH targets

20.3. GMPASM assembler

May be useful for handbuilt and rare systems (DMX1000?).

20.4. Extracting ISO Superboard Forth ROMS for MAME emulation

20.5. 'bwocl' OpenCL tooling

20.5.1. Offline compilation

20.5.2. Standard Kernel Running

20.6. hardware support for classic 5V CPUs

20.6.1. RTX2000, CDP1802 still available!

20.6.2. 6502, 68000, 320C30, others on hand

20.6.3. CPUs with totally async bus may be supportable without RAM

20.6.4. Could use small footprint monitor in asm (gmpmon?)

20.7. Existing 'retro' hardware still working?

20.7.1. OSI Superboard

Unknown. Composite to VGA adapter didn't seem to work. Needs analysis. Found OSI model 610 board underneath!

20.7.2. Super Jolt

No output. Needs analysis.

20.7.3. Ampro Little Board

Not booting. Needs analysis.

20.7.4. Rockwell R65F11 Demo board

UART sending "NO ROM" at 2400 7N1 as expected with 2MHz xtal. MAME emulator possibilities?