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ZuluSCSI Compact Homebrew is an RP2040-based SCSI emulator, provided in a compact, easy-to-assemble kit form. All through hole components necessary to assemble a working unit are provided. Some through-hole assembly required.
SCSI termination is controlled via a jumper, as is initiator mode. The optional piezo buzzer add-on allows you to hear disk activity.
ZuluSCSI Compact RP2040 Homebrew Edition is powered by the Raspberry Pi Foundation's RP2040 microcontroller, a dual-core 133MHz ARM Cortex-M0+ processor. ZuluSCSI supports SCSI-2, 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.
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, which then presents them as the drives to the SCSI host. Each image file represents a SCSI drive. ZuluSCSI Compact Homebrew/RP2040 board dimensions are 90mm by 60mm
- Maximum read speeds with ZuluSCSI RP2040 can be up to 9.5 megabytes per second, with a suitably fast SCSI controller.
- ZuluSCSI uses the same SCSI command handling code as SCSI2SD V6, compatibility with nearly all devices that speak both SCSI-1 and SCSI-2 is extremely high.
Firmware updates are as simple as placing a file on a FAT32 or exFAT-formatted SD card, inserting it SAVEin the SD card slot, and applying power to the ZuluSCSI. A firmware recovery mechanism is also provided.
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Features
- Designed to be powered via SCSI termination power, when provided by the host
SCSI Termination is configured via the TERM_EN jumper
Emulates up to 7 SCSI devices simultaneously, including CD-ROM
- Speaks both SCSI-1 and SCSI-2
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.
74LVTH125 SCSI bus transceivers
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