The ABC 1600 used monochrome graphics with a display resolution of 1024 × 768 and the screen could be turned 90° while in use depending on whether the user desired to work in standing (portrait) or horizontal (landscape) format. The hard disk had a capacity of 13MB and the 5.25-inch floppy disk drive stored 640 KB.[2]
The ABC 1656 was a 1600 model with a hard disk capacity of 40 MB or 80 MB instead.[2]