“ICP” – In-Circuit-Programmer

The ICP plugs into the cartridge port. It has a 2.4” TFT vertical screen, a rotary selector (bottom right) with a push button (select!) and a spare button (to the bottom left) that operates as a “back” button. It’s controlled by a pico plus 2W (16mb flash, 8mb psram, 2.4ghz wifi, Bluetooth) + extra 32MB flash.

It is powered by the 5v line on the cartridge port or USB. It can act as an swd programmer to DeMon when connected via USB to a PC, and can load firmware, etc via an sd card slot to DeMon and through DeMon to the other chips when not connected to a PC.

Cartridge pins used by the ICP:

A	B	C	D	E	F	G	H	I	J	K	L	M	N	O
GND	3.3v	CS	RX/MISO	SCK	TX/MOSI	CD	DeMon ICP SWDCLK	DeMon ICP SWDIO	RESET	DeMon SCL	DeMon SDA	IRQ	5v	LED
Pico 18	NC	Pico 12	Pico 16	Pico 14	Pico 15	Pico 9	Pico 10	Pico 11	Pico 21	Pico 20	Pico 19	Pico 17	Pico 39 via diode, Led 5v	Led data in

Cartridge LED:

Cart pin	LED pin
A	GND
O	Data in
N	5v

Pico plus 2W:

Description	Connection	Pico pin	Pico pin	Connection	Description
PWM 0A	Buzzer	1 (0)	40		VBUS
SPI0 CSn	(7) Screen CS	2 (1)	39	Cart N via diode	VSYS
GND		3	38		GND
SPI0 SCK	(3) Screen SCL/SD CLK	4 (2)	37		3v3 EN
SPI0 TX	(4) Screen SDA/SD MOSI	5 (3)	36	(2) Screen VCC	3v3
SPI0 RX	SD MISO	6 (4)	35		ADV REF
SPI0 CSn	SD CS	7 (5)	34 (28)	(11) Screen Push	Encoder button
GND		8	33		GND
CART CD	Cart G	9 (6)	32 (27)	(10) Screen B	Encoder B
SWD SCK	Cart I	10 (7)	31 (26)	(9) Screen A	Encoder A
SWD IO	Cart I	11 (8)	30		RUN
SPI1 CSn	Cart C	12 (9)	29 (22)	(12) Screen K0	Back key
GND		13	28		GND
SPI1 SCK	Cart E	14 (10)	27 (21)	16MB Flash CS 1	SPI0 CSn
SPI1 TX	Cart D	15 (11)	26 (20)	(5) Screen RES	Screen reset
SPI1 RX	Cart F	16 (12)	25 (19)	(6) Screen DS	Screen data command
I2C1 IRQ	Cart M	17 (13)	24 (18)	(8) Screen BLK	PWM 1A
GND		18	23	(1) Screen GND	GND
I2C1 SDA	Cart L	19 (14)	22 (17)	16MB Flash CS 0	SPI0 CSn
I2C1 SCL	Cart K	20 (15)	21 (16)	Cart J	Cart RESET

W25Q128:

Pin	Description	SPI connection
1	VCC	3v3
2	CS	CS
3	DO	MISO
4	GND	GND
5	CLK	SCK
6	DI	MOSI

It can act as an SPI slave, passing data to/from the SD card slot. The SDA/SCL lines can also be sent data so the screen can be a debug screen for DeMon – console messages being displayed on the vertical screen. The screen can display 30x40 characters with the rotary control being able to scroll the console up/down. Possible wifi web interface? With no SD card, it should contain enough data internally (it has 2 spare 16MB flash chips) in its onboard flash to program the bootstrap to get DeMon to start booting on it’s own/be unbricked.

Modes:

DeMon SWD

Unbrick/install DeMon bootstrap

Settings – to initialise SD, setup wifi, Bluetooth, etc

In circuit programmer – from SD card files, programming via SWD

Debug console, USB data console out and also console in (using I2C).

Cartridge emulator to SD card (using SPI)

Cartridge emulator to PC via USB (using SPI)

Cartridge emulator via WiFi (ftp?)

FPGA image loader (from SD card)

Folders:

The SD card will have pass through from a folder structure, so DeMon won’t be aware of higher up folders.

System: contains subfolders (versioned) of system recovery files for Ant64 to fully clean setup the computer

FPGA: contains FPGA “files”

Carts: contains cartridge sub folders

Console: contains logs captured from the debug console

Settings: folder containing settings