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Tandy 2000
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== Specifications == *8 MHz Intel 80186 *128 KB RAM (expandable to 256 KB on CPU board with two banks of type 4164 DRAMs) *One or two 720 KB {{frac|5|1|4}}-inch floppy drives *10 MB [[Modified Frequency Modulation|MFM]] hard drive (upgradable to two 32 MB hard drives, or two 80 MB drives with ROM modifications and third-party software) *8-pin DIN monochrome monitor port *DB-25 RS-232 serial port *Proprietary parallel printer port (required adapter cable to connect to a [[Centronics port|Centronics-port]] printer) *Optional 8087 math coprocessor board plugged directly into CPU board Four card slots on the back could accept expansion boards without any need to open the case, using a rail system. Available expansion boards/cards included:<ref name="rsc17">{{cite web |title=1987 Radio Shack Tandy Computer Catalog RSC-17B |url=https://radioshackcatalogs.com/flipbook/c1987_rsc-17b.html |website=radioshackcatalogs dot com |publisher=Tandy/Radio Shack |pages=6,7,34 |year=1987 |archive-url=https://web.archive.org/web/20210103215510/https://radioshackcatalogs.com/flipbook/c1987_rsc-17b.html |archive-date=January 3, 2021}}</ref> *256 KB RAM card (one or two could be added for 768 KB total; each card had two 128 KB banks of nine 64 KB DRAM chips, type 4164) *Monochrome Graphics Card with optional color graphics expansion (must occupy bottom slot; Tandy monochrome VM-1 or color CM-1 monitor required) *Serial I/O expansion board providing four RS-232 ports (proprietary driver software required) *Hard disk controller card with two ribbon cables to an outboard hard drive up to 35 MB capacity *External 10 MB Disk Cartridge System *Mouse/Clock controller, including mouse controller and battery-backed [[real-time clock]] *ViaNet [[Network card]] ([[ARCNET]] [[BNC connector|BNC]])
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