mm. Both are 13-inch displays and have a power cable and a nine-pin RGB cable to attach to the Tandy CGA port. The more expensive CM-11 also supports a special proprietary Tandy-enhanced 225 scan line text display mode. Tandy also offered monochrome monitors that support MDA and Hercules standard that also work with Tandy 1000. As it uses a CGA-compatible interface, non-Tandy monitors that support CGA should work. Keyboard The original Tandy 1000, SX, EX, TX, HX use a proprietary keyboard and keyboard layout that is not compatible with the PC/XT/AT standard. The layout of the keyboard prefigured the IBM Model M keyboard, with function keys arranged in a row at the top, instead of on the left as in the PC and PC XT/AT. Later models of the Tandy 1000 series, such as the 1000 SL, TL, and RL series use a keyboard more similar and compatible with the IBM PS/2 series keyboard connector and layout. Mouse options As the Tandy 1000 uses the same game ports as the Tandy Color Computer series, the 26-3025 Color Mouse and 26-3125 Deluxe Mouse are compatible with the Tandy 1000, though not all DOS software and drivers recognize them. The Tandy Digi-Mouse requires a separate controller that was available in either ISA or PLUS format. Systems with RS-232C serial ports can use standard serial mice, and later systems, such as the 1000 RL, feature a PS/2 mouse connector. Joystick options Radio Shack offered a one-button joystick with its proprietary 6-pin DIN joystick connector that is compatible with the older TRS-80 Color Computer but not standard 15-pin IBM PC game ports often found on sound cards and i/o multifunction ISA cards. It works with many games written to take advantage of Tandy graphics and sound. Modem options Radio Shack offered Tandy 1000 PLUS 300-Baud PC Modem that is compatible with the 1000EX/HX that used PLUS slots. Radio Shack also offered 2400-baud internal modem. Third party modems with speeds of 14k baud should work provided they are eight-bit ISA, and fit. Printers Radio Shack sold the Tandy DMP-130A dot matrix printers to go along with their Tandy 1000 line, along with compatible card-edged printer cable. This printer was sold at home budget prices. Radio Shack often offered a package bundle with a Tandy 1000 computer, CM-5 budget monitor and DMP-130A printer. Using specially-designed aftermarket cables, it is possible to connect non-Tandy printers to the