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gptkbp:instanceOf
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gptkb:personal_computer
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gptkbp:audio
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internal speaker
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gptkbp:brand
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gptkb:Radio_Shack
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gptkbp:color
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white
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gptkbp:compatibleWith
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gptkb:TRS-80_Model_III
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gptkbp:countryOfOrigin
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gptkb:United_States
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gptkbp:displayType
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monochrome CRT
64×16 text
80×24 text
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gptkbp:expansion
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gptkb:UART
expansion interface
RS-232 serial port
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gptkbp:floppy_drives
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one or two 5.25-inch drives
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gptkbp:graphics_capability
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limited (no bitmap graphics in base model)
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https://www.w3.org/2000/01/rdf-schema#label
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TRS-80 Model 4
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gptkbp:introduced
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April 1983
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gptkbp:judge
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all-in-one desktop
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gptkbp:key
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101-key keyboard
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gptkbp:mainboard
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single board design
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gptkbp:manufacturer
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gptkb:Tandy_Corporation
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gptkbp:marketedAs
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gptkb:education_technology
business computer
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gptkbp:nickname
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Model 4
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gptkbp:notable_user_group
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gptkb:TRS-80_Users_Group
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gptkbp:notableFeature
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could run CP/M with add-on
detachable keyboard (in some models)
improved display over Model III
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gptkbp:notableFor
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gptkb:VisiCalc
gptkb:Scripsit
gptkb:Monte_Carlo_BASIC
gptkb:Super_Utility_Plus
gptkb:TRSDOS_6
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gptkbp:operatingSystem
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gptkb:CP/M
gptkb:LDOS
gptkb:TRSDOS
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gptkbp:parallel_port
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optional
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gptkbp:powerSource
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internal
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gptkbp:predecessor
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gptkb:TRS-80_Model_III
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gptkbp:priceRange
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$999 (base model)
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gptkbp:processor
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gptkb:Zilog_Z80A
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gptkbp:RAM
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64 KB
128 KB
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gptkbp:serial_ports
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optional
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gptkbp:speed
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4 MHz
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gptkbp:storage
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cassette tape
5.25-inch floppy disk
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gptkbp:successor
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gptkb:TRS-80_Model_4D
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gptkbp:weight
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about 25 pounds
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gptkbp:bfsParent
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gptkb:TRS-80_Model_III
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gptkbp:bfsLayer
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6
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