2021-07-17 03:45:45 +00:00
## Ordered:
* 5PCS IDT7132SA100P IDT7132SA DIP-48 HIGH-SPEED 2K x 8 DUAL-PORT STATIC RAM
* STM32F411 "BlackPill" Development Board
## Misc
* https://pastebin.com/raw/1kR0vbRA
## ESP32 Interupt Issues
* ESP32 Thread I started: https://esp32.com/viewtopic.php?f=12& t=21855
* " Consider 74ls373 to latch the value to be processed by software."
* It might also be worth trying ESP32's assembly high-level interrupts. I've never used them personally, but they can allegedly give interrupt latencies that are significantly lower than the ~2us for regular ESP32 C interrupts.
* See: https://esp32.com/viewtopic.php?t=422
* See: https://docs.espressif.com/projects/esp ... rupts.html
* components/esp_system/port/soc/esp32/dport_panic_highint_hdl.S
2021-07-31 18:01:54 +00:00
## Python binar/hex/dec manipulation
```
In [11]: format(10, '016b')
Out[11]: '0000000000001010'
bin(10)
```
2021-08-19 00:08:46 +00:00
## Jumper and Breakout pins
* Input (to ESP32) only
~IOSEL (from Apple2)
~BSYL (from Apple2 side of IDT7132)
~BSYR (from ESP32 side of IDT7132)
+ Apple II Pins to header
+ IOSEL
+ DEVSEL
+ IOSTROBE
+ IDT7132S Pins to header
+ BSYL
+ BSYR
+ ESP32 Pins to header
+ GPIO 0
+ GPIO 1 (TX)
+ GPIO 2
+ GPIO 3 (RX)
+ GPIO 4
+ GPIO 26
+ GPIO 27
+ GPIO 32
+ GPIO 33
+ GPIO 34 (input only) No pullup, needs resistor?
+ GPIO 35 (input only) No pullup, needs resistor?
+ SENSOR_VP (input only) No pullup, needs resistor?
+ SENSOR_VN (input only) No pullup, needs resistor?
