SweABCext
ABC80 / ABC800 add-on: RP2350B emulates 4680 disk controllers and memory expansion, with SD images and USB.
Pictures are KiCad 3D renders of revision 1.00. A photo of a built board can replace them later.
SweABCext is an ABC-bus add-on for ABC80 / ABC800. An RP2350B answers the bus as Luxor 4680 disk controllers (MO, MF, SF, HD, and XD) and as ABC memory expansion. Disk images are raw 256-byte-sector files on a microSD card. USB provides a command line and, when emulation is off, mass storage.
Firmware also includes SmartAid, SuperBASIC, and UFD-DOS images in flash. A file under /abcrom/ on the card overrides a built-in image when it is present.
The pictures here are board renders from KiCad (rev 1.00). KiCad sources and RP2350 firmware are in git.
Photos
Click a picture to show it larger above.