ESP32 appears to be working, but noting on the front panel is working.

[EPSavage]

The on/off sw does nothing. I can't get the IMSAI into a RUN state. The log seems to indicate all is well.
Here is the log.

============ PuTTY log 2024.07.06 17:36:15 ============
ets Jun 8 2016 00:22:57

rst:0x1 (POWERON_RESET),boot:0x3f (SPI_FAST_FLASH_BOOT)
configsip: 188777542, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff0030,len:4940
ho 0 tail 12 room 4
load:0x40078000,len:15120
load:0x40080400,len:3764
entry 0x40080620
�[0;32mI (306) psram: This chip is ESP32-PICO�[0m
�[0;32mI (306) spiram: Found 64MBit SPI RAM device�[0m
�[0;32mI (306) spiram: SPI RAM mode: flash 80m sram 80m�[0m
�[0;32mI (309) spiram: PSRAM initialized, cache is in low/high (2-core) mode.�[0m
�[0;32mI (316) cpu_start: Pro cpu up.�[0m
�[0;32mI (320) cpu_start: Starting app cpu, entry point is 0x40081c40�[0m
�[0;32mI (0) cpu_start: App cpu up.�[0m
�[0;32mI (811) spiram: SPI SRAM memory test OK�[0m
�[0;32mI (854) cpu_start: Pro cpu start user code�[0m
�[0;32mI (854) cpu_start: cpu freq: 240000000�[0m
�[0;32mI (854) cpu_start: Application information:�[0m
�[0;32mI (856) cpu_start: Project name: imsaisim_esp32�[0m
�[0;32mI (862) cpu_start: App version: v1.12.0�[0m
�[0;32mI (867) cpu_start: Compile time: Jun 10 2023 03:02:39�[0m
�[0;32mI (873) cpu_start: ELF file SHA256: cd219fa8e9f544b1...�[0m
�[0;32mI (879) cpu_start: ESP-IDF: v4.4.4-1-gadda465dc3�[0m
�[0;32mI (885) heap_init: Initializing. RAM available for dynamic allocation:�[0m
�[0;32mI (892) heap_init: At 3FFAE6E0 len 00001920 (6 KiB): DRAM�[0m
�[0;32mI (898) heap_init: At 3FFBBD00 len 00024300 (144 KiB): DRAM�[0m
�[0;32mI (905) heap_init: At 3FFE0440 len 00003AE0 (14 KiB): D/IRAM�[0m
�[0;32mI (911) heap_init: At 3FFE4350 len 0001BCB0 (111 KiB): D/IRAM�[0m
�[0;32mI (917) heap_init: At 4009DAF0 len 00002510 (9 KiB): IRAM�[0m
�[0;32mI (923) spiram: Adding pool of 3629K of external SPI memory to heap allocator�[0m
�[0;32mI (932) spi_flash: detected chip: gd�[0m
�[0;32mI (936) spi_flash: flash io: qio�[0m
�[0;32mI (940) cpu_start: Starting scheduler on PRO CPU.�[0m
�[0;32mI (0) cpu_start: Starting scheduler on APP CPU.�[0m
�[0;31mE (990) nvs: Error (ESP_ERR_NVS_NOT_FOUND) opening NVS handle!�[0m
�[0;33mW (990) nvs: Defaulting log level NVS_LOG_LEVEL = INFO�[0m
�[0;32mI (992) esp32_boot: Log Level set to INFO�[0m
�[0;32mI (996) esp32_hardware: Shell Running on Core#0�[0m
�[0;32mI (1482) esp32_hardware: CP-A NOT Found - Power Switch 0�[0m

---

• CONGRATULATIONS & WELCOME TO THE IMSAI 8080esp
• You can disregard any earlier NVS_NOT_FOUND error for now.
• • you will configure the NVS later, refer to the Configuration guide.
• Seeing this message suggests that you've soldered the PSRAM (SPI SRAM)
• successfully and it is passing its tests, see above.
• Check the uSD tests below to know if that has also been soldered
• successfully.
• (If this is not a new IMSAI 8080esp then the PWR switch is faulty.)

---

�[0;32mI (1532) esp32_hardware: DIP/MEM Switches: 00�[0m
�[0;32mI (1537) esp32_hardware: Initializing uSD card�[0m
�[0;32mI (1542) gpio: GPIO[13]| InputEn: 0| OutputEn: 1| OpenDrain: 0| Pullup: 0| Pulldown: 0| Intr:0 �[0m
�[0;32mI (1605) esp32_hardware: uSD card successfully detected and mounted with the following details:�[0m
Name: SDABC
Type: SDHC/SDXC
Speed: 40 MHz
Size: 15203MB

---

• The uSD tests appear to have succeeded.
• NOTE: THIS COULD BE A FALSE POSITIVE IF THE ESP32 HAS RESTARTED
• Please check all earlier logs and/or press a H/W reset switch and
• check the logs. Any error with the uSD is a bad sign,
• even if it can succeed after a restart.
• If any error with the uSD is observed, check all soldering and the
• RN1 resistor network, including the orientation of RN1.

---

�[0;32mI (1658) esp32_update: Checking for image update package�[0m
�[0;32mI (1665) esp32_boot: OPENING BOOT.CONF�[0m
�[0;32mI (1670) esp32_boot: OPENED: /sdcard/imsai/conf/boot.conf�[0m
�[0;32mI (1676) esp32_boot: ENV: NTP_SERVER=pool.ntp.org�[0m
�[0;32mI (1680) esp32_boot: ENV: TZ=AEST-10AEDT,M10.1.0,M4.1.0�[0m
�[0;32mI (1686) esp32_boot: ENV: HOSTNAME=imsai8080�[0m
�[0;32mI (1691) esp32_boot: ENV: PORT=80�[0m
�[0;32mI (1695) esp32_boot: ENV: SSID=mySSID�[0m
�[0;32mI (1699) esp32_boot: ENV: PASSWORD=myPASSWORD�[0m
�[0;32mI (1704) esp32_boot: ENV: WIFI.sta.scan=1�[0m
�[0;32mI (1709) esp32_boot: ENV: TTY.netsrv.buffer_delay=33�[0m
�[0;32mI (1715) esp32_boot: ENV: LPT.netsrv.buffer_delay=33�[0m
�[0;32mI (1720) esp32_boot: ENV: HARDDISK=hd-ws4�[0m
�[0;32mI (1725) esp32_boot: ENV: MODEM.init=ATS15=1 �[0m
�[0;32mI (1730) esp32_hardware: Initialise UART1 to default configuration�[0m
I (1739) wifi:wifi driver task: 3ffc3ea8, prio:23, stack:3584, core=0
�[0;32mI (1743) system_api: Base MAC address is not set�[0m
�[0;32mI (1748) system_api: read default base MAC address from EFUSE�[0m
I (1759) wifi:wifi firmware version: 6567a16
I (1760) wifi:wifi certification version: v7.0
I (1763) wifi:config NVS flash: enabled
I (1766) wifi:config nano formating: disabled
I (1771) wifi:Init data frame dynamic rx buffer num: 32
I (1775) wifi:Init management frame dynamic rx buffer num: 32
I (1781) wifi:Init management short buffer num: 32
I (1785) wifi:Init dynamic tx buffer num: 32
I (1790) wifi:Init tx cache buffer num: 32
I (1793) wifi:Init static rx buffer size: 1600
I (1798) wifi:Init static rx buffer num: 16
I (1801) wifi:Init dynamic rx buffer num: 32
�[0;32mI (1806) wifi_init: rx ba win: 16�[0m
�[0;32mI (1809) wifi_init: tcpip mbox: 64�[0m
�[0;32mI (1813) wifi_init: udp mbox: 6�[0m
�[0;32mI (1817) wifi_init: tcp mbox: 10�[0m
�[0;32mI (1821) wifi_init: tcp tx win: 11680�[0m
�[0;32mI (1825) wifi_init: tcp rx win: 11680�[0m
�[0;32mI (1830) wifi_init: tcp mss: 1460�[0m
�[0;32mI (1834) wifi_init: WiFi IRAM OP enabled�[0m
�[0;32mI (1838) wifi_init: WiFi RX IRAM OP enabled�[0m
�[0;32mI (1843) wifi_init: LWIP IRAM OP enabled�[0m
I (1849) wifi:Set ps type: 0

�[0;32mI (1851) esp32_hardware: MAC ADDR: 30:83:98:df:c1:ed�[0m
�[0;32mI (1856) esp32_netsrv: AP Mode - Using SSID: imsai8080 (HOSTNAME)�[0m
�[0;32mI (1866) esp32_netsrv: Starting Wi-Fi now�[0m
�[0;32mI (1868) phy_init: phy_version 4670,719f9f6,Feb 18 2021,17:07:07�[0m
I (1958) wifi:mode : softAP (30:83:98:df:c1:ed)
I (1960) wifi:Total power save buffer number: 16
I (1960) wifi:Init max length of beacon: 752/752
I (1960) wifi:Init max length of beacon: 752/752
�[0;32mI (1966) esp32_netsrv: EVENT: WIFI_EVENT - 12�[0m
�[0;32mI (1970) esp32_netsrv: soft-AP started�[0m
�[0;32mI (1974) esp32_netsrv: Initializing hostname to: imsai8080�[0m
�[0;32mI (1980) dns_server: STARTING DNS SERVER�[0m
�[0;32mI (1985) start_dns_server: dns server task started�[0m
�[0;32mI (1990) dns_server: Socket created�[0m
�[0;32mI (1994) dns_server: Socket bound, port 53�[0m
�[0;32mI (1999) dns_server: Waiting for data�[0m
�[0;32mI (2990) esp32_netsrv: Initializing MDNS�[0m
�[0;32mI (3001) esp32_netsrv: Initializing SNTP�[0m
�[0;32mI (3001) netsrv: Using HTTP Port: 80 [80]�[0m
�[0;32mI (3001) netsrv: Created Semaphore�[0m
�[0;32mI (3006) esp32_netsrv: WiFi result is 1�[0m
�[0;33mW (3008) esp32_boot: Cannot set system time by NTP in AP mode, or no NTP_SERVER set�[0m
�[0;32mI (3016) esp32_boot: The current date/time is: Thu Jan 1 11:00:02 1970 [2]�[0m
�[0;32mI (3023) esp32_hardware: POST flash timer stopped�[0m
�[0;32mI (3029) esp32_boot: Starting Watchdog Timer�[0m

[udo-munk]

Here the log says:
esp32_hardware: CP-A NOT Found - Power Switch 0
Looks like the esp32 has no access to the CP-A switches.

[nbreeden2]

Did you solder the extra 6 pins to the EXP32?

[EPSavage]

The resolution: I had U6 and U9 swapped. Putting the correct chip into its socket corrected the issue.