Emulate a SCSI hard drive using micro SD card with ZuluSCSI
ZuluSCSI RP2040 is a new member of the ZuluSCSI product family, and is powered by the Raspberry Pi Foundation's RP2040 microcontroller, a dual-core 133MHz ARM Cortex-M0+ processor. Supports synchronous and asynchronous transfers, with read speeds up to ten megabytes per second. A SCSI controller with FAST SCSI and synchronous mode is required to achieve maximum speeds.
This ZuluSCSI Compact RP2040 uses a microSD card socket, is pre-flashed with firmware, and hand-tested. All surface-mount components are factory-assembled, and the SCSI interface on the board has been tested to ensure full functionality.
ZuluSCSI is a new generation of file-based SCSI HDD & CD-ROM emulators, and represents a fusion of SCSI2SD V5, V6, and concepts from other open source SCSI emulators. Hard drive and CD-ROM drive images are stored on a standard FAT32 or exFAT-formatted SD card. The ZuluSCSI firmware looks for file names which adhere to a simple but powerful naming convention, and presents them as the drives to the SCSI host. Each image file represents a SCSI drive.
ZuluSCSI Compact RP2040 board dimensions are 90mm by 60mm
Features

Emulates up to 7 SCSI devices simultaneously, including CD-ROM

Speaks both SCSI-1 and SCSI-2

SCSI termination is controlled via a jumper"

Firmware upgrade simplicity; As easy as placing a file on the SD card.

Highly configurable using a text-based ini file, zuluscsi.ini

External LED pin header for attaching remote LEDs.

Designed to be powered via SCSI termination power, when provided by the host

74LVTH125 SCSI bus transceivers