The Atari 8-bit RAM cartridge with an own ego and opinion what should be in the RAM.

| Address | Name | Descriptio Read | Write | |---------+------+------------| | $D500 | | 'E' | | $D501 | | 'R' | | $D502 | | 'A' | | $D503 | | 'M' | | $D504 | | $YY | | $D505 | | $YY | | $D506 | | $MM | | $D507 | | $DD |

| $D508 | ECTL | $00=ready, $01=busy, $8x=error | $00=reset,$01=begin command | | $D509 | EDAT | Data, increments address | Data to write, increments address | | $dD0a | ERET | n/a | Strobe, run command |

| Command | Name | Arguments | Description | G | Graphics | mode: byte (8,9,15), address: word ($8000...$bffff), width: byte (bytes 32,40,48), height: byte (lines 1..255) | width*height<$2000 | SD | Shape Define | shapeNumber: word ($0001-$ffff), bpp: ($01, $02, $04), width: word (pixels 1..256), height: word (pixels 1..256), format: byte ($01=raw), paletteSize: word, paletteMap: array[paletteSize], maskIndex: byte (0..paletteSize), data: array[0...dataSize-1] | dataSize =

Getting started with Raspberry Pi Pico-series If you get an error message "No accessible RP2040/RP2350 devices in BOOTSEL mode were found." accompanied by a note similar to Device at bus 1, address 7 appears to beana RP2040 device in BOOTSEL mode, but picotool was unable to connect, indicating that there was a Pico-series device connected, then you can run picotool using sudo, e.g. $ sudo picotool info -a If you get this message on Windows, you will need to install a driver. Download and run Zadig, select RP2 Boot (Interface 1) from the dropdown box and select WinUSB as the driver, and click on the "Install Driver" button. Wait for the installation to complete - this may take a few minutes.