Tandy Radio Shack TRS-80 Model 4P
Země / Country:
USA / United States
Rok / Year:
1983
Česky / Czech :
Tandy Radio Shack TRS-80 Model 4P, USA, 1983. Transportovatelná verze Modelu 4 byla uvedena 15. listopadu 1983 za 1799 dolarů. Používá Z80A na 4 MHz, v režimu Model III 2 MHz, a 64 KB RAM rozšiřitelných na 128 KB. Vestavěné jsou dvě 5,25″ mechaniky po přibližně 184 KB a 9″ CRT s textem 80 × 24 v režimu Model 4. Má paralelní i RS-232C port a malou bootovací ROM místo plných ROM Modelu III. Pracuje s TRSDOS 6 a po načtení obrazu ROM umí také software Model III, dostupné bylo i CP/M.
English / Anglicky :
Tandy Radio Shack TRS-80 Model 4P, USA, 1983. The transportable Model 4 was released on November 15, 1983 for $1,799. It uses a Z80A at 4 MHz, or 2 MHz in Model III mode, with 64 KB RAM expandable to 128 KB. Two built in 5.25 inch drives store about 184 KB each and the 9 inch CRT displays 80 × 24 in Model 4 mode. Parallel and RS-232C ports are standard, while only a small boot ROM is fitted instead of the full Model III ROM set. It runs TRSDOS 6 and can load Model III ROM images for compatibility, with CP/M also available.
Technické údaje / Specifications
Výrobce / Manufacturer: Tandy Corporation / Radio Shack, United States
Model: Tandy Radio Shack TRS-80 Model 4P
Rok / Year: 1983
Země / Country: USA / United States
Typ / Type: Portable TRS-80 Model 4P with integrated CRT
CPU: Zilog Z80A
Takt CPU / CPU clock: 4 MHz, Model III compatibility 2 MHz
RAM: 64 KB standard, expandable to 128 KB
ROM: Small bootstrap ROM, DOS loads from floppy
Operační systém / Operating system: TRSDOS 6 (Model 4 mode, disk), LDOS and other compatible disk systems optional, boot ROM
Video / Graphics: Monochrome integrated CRT, 80 × 24 or Model III compatible 64 × 16 text
Zvuk / Sound: Simple system speaker tone
Média / Storage: Two built in 5.25 inch floppy drives, model dependent
Rozhraní / Interfaces: RS-232, printer, external disk and expansion connections
Napájení / Power: Internal AC mains power supply
Rozměry / Dimensions: Approximately 419 × 337 × 236 mm (closed transport chassis)
Původní cena / Original price: US $1,799 at November 1983 launch
Zdroje / Sources
TRS-80.com, Model 4P factory specification and CPU speed
Original service manuals archive
Original Radio Shack TRS-80 Model 4P service manual 9.3 in H × 16.5 in W × 13.25 in D
