Editing Tandy 1000 (section)

====1000 RSX====
A more upscale offering, the RSX offers a 25&nbsp;MHz 80386SX processor, 1 MB RAM, two 16-bit ISA slots, AcuMos SVGA video, a bidirectional parallel port, and standard PS/2 keyboard and mouse ports. It is a full 386-class PC and can run Microsoft Windows 3.x. Two sockets for SIMM memory cards are available. Only 1 MB or 4 MB SIMMs of the 9-chip type are supported, and if two are installed they have to be of like capacity. With two 4 MB SIMMs installed, the 1000 RSX can be expanded to 9 MB RAM without using an ISA slot. The RSX/HD variant comes with a 52 MB hard drive using an AT-compatible IDE interface; replacement hard drives up to 504 MB can be substituted. Because of the slimline case, only one hard drive can be installed alongside the 1.44 MB 3.5" floppy drive.<ref>{{cite web|title=Tandy 1000 RSX specifications|url=http://support.radioshack.com/support_computer/doc1/1332.htm|website=Radio Shack Support|publisher=Tandy/Radio Shack|access-date=June 13, 2016}}</ref><ref>{{cite web|title=Tandy 1000 Rl/RLX Pictures|url=http://www.oldskool.org/guides/tvdog/RLRLX.html|website=Oldskool.org|publisher=TV Dog|access-date=June 13, 2016}}</ref>

The motherboard has a socket for the 80387SX math coprocessor. The RSX still retains the Tandy 1000 3-voice sound hardware and DAC, though the I/O address for the 3-voice sound chip was moved, rendering many games compatible with it unable to play music unless modified. The DAC can be used to emulate the Covox Speech Thing via MS-DOS device drivers for limited sound support. This works with ''[[Chuck Yeager's Air Combat]]''.<ref>{{Cite web|url=http://www.mobygames.com/game/chuck-yeagers-air-combat/techinfo|title=Chuck Yeager's Air Combat for DOS (1991) Tech Info|website=MobyGames|access-date=2016-08-08}}</ref>

Windows 3.xx sound device drivers are available that work in Windows 95 (with full 9MB RAM) on Tandy 1000 RSX.
The ACUMOS VGA graphics can be software-updated with Cirrus Logic BIOS (via MS-DOS driver) to allow VESA/SVGA to function in Windows 95, as the Windows 3.xx Tandy VGA drivers are insufficient for Windows 95.