As the Tandy 1000 used the same game ports as the Tandy Color Computer series, the 26-3025 Color Mouse and 26-3125 Deluxe Mouse were compatible with the Tandy 1000, though not all DOS software and drivers were written to recognize them. The Tandy Digi-Mouse was also available, which required a separate controller that was available in either ISA or PLUS format. Systems with RS-232C serial ports could use standard serial mice, and later systems, such as the 1000 RL, featured a PS/2 mouse connector.