Gemini Challenger

{{Short description|A Motorola 68000 based computer, released in 1985}}

{{ infobox computer

| image =

| caption = Gemini Challenger

| manufacturer = Gemini

| type = Microcomputer

| releasedate = {{Start date and age|1985}}

| price = {{currency|4750|GBP}}

| lifespan = {{Start date and age|1987}}

| unitssold =

| media = 5.25" 1.2 MB floppy disc

| os = MBOS, Mirage, TDI P-system, CP/M

| input =

| camera =

| power =

| cpu = Motorola 68000 @ 12 MHz

| storage = Hard disks (20 to 70 MB)

| memory = 512 KB

| display = Composite BNC, RF RCA

| graphics = 768 x 576 @ 16 to 16 million colours; 1024 x 1024 @ 64 colours with optional HD63484 based video card

| sound =

| connectivity = SCSI, Parallel, 2 x Serial RS232, 4 x 68K expansion slots

| controllers =

| service =

| dimensions =

| weight =

| touchpad =

| predecessor =

| successor =

| related =

}}

The Gemini Challenger was a Motorola 68000 based computer, released in 1985 and designed by Gemini Microcomputers based in Chesham.{{Cite web |date=18 March 2011 |title=Gemini |url=https://nascom.wordpress.com/gemini/ |website=nascom.info - Information on the Nascom & Gemini computers}}{{Cite web|url=https://techmonitor.ai/techonology/glasgow_university_places_order_with_gemini_computer_systems|title = Glasgow University Places Order with Gemini Computer Systems|date = 14 January 1988}} This was Gemini's first non Z80 computer and their last.{{Cite book|url=https://books.google.com/books?id=D7RS9yegrtoC&q=+challenger&pg=PA32|title = VINTROPEDIA - Vintage Computer and Retro Console Price Guide 2009|isbn = 9781409212775|last1 = Starr|first1 = Michael|last2 = Chapple|first2 = Craig|date = 9 July 2008| publisher=Lulu.com }}

It was designed to look like an ordinary PC-compatible computer, with a Wyse WY-50 remote terminal for monitor.{{Cite web |title=Challenger Gemini |url=https://www.old-computers.com/museum/computer.asp?st=1&c=874 |access-date=2022-10-31 |website=www.old-computers.com}} Four operating systems were available (MBOS, aimed for business and supporting multiuser; Mirage, another multiuser OS; TDI p-System, a version of UCSD p-System including Pascal; CP/M 68k), along with an advanced optional graphic card (based on the Hitachi HD63484) with a maximum resolution of 1024 x 1024 pixels and 16 million available colours.