| TRS 80 Model 4 ( Model Number: 262-1069 ) - 01 |
The TRS 80 model IV is one of the last model of the TRS 80 serie (and perhaps the less known). It is fully compatible with the TRS 80 model III (except its 80 columns). It has 128 kb RAM, the 64 upper KB being used as a ram disk. It has one or two 5.25" floppy disk (184k each) and runs under TRSDOS 6.0 or 1.3, LDOS or CP/M. A transformation kit "TRS80 model III -> model IV" was available. The Model 4 was followed by the Model 4D. The only difference being double sided drives, as opposed to single sided drives. A portable version of the Model IV called Model 4P was also marketed few time after. (www.old-computers.com) |
| Manufacturer | Tandy Radio Shack | Name | TRS 80 Model 4 |
| Type | Professional Computer | Origine | USA |
| Introduction Date | 1983 | End of production | ??? |
| Built in Language | ??? | Keyboard | Full-stroke keyboard with separated numeric keypad |
| CPU | Zilog Z80 | Speed | 4 Mhz |
| Coprocessor | ??? | Amount of Ram | 64 KB (up to 128 KB) |
| Vram | ??? | Rom | 14 kb |
| Text Modes | 64 x 16 / 32 x 16 / 64 x 40 / 80 x 24 | Graphic Modes | ??? |
| Colors | monochrom | Sound | ??? |
| Size / Weight | ??? | Built in Media | One or two 5.25" disk-drives |
| I/O Ports | Tape (500 or 1500 bauds), Centronics, I/O ports compatible with Model III | OS | ??? |
| Power Supply | Internal | Introduction Price | ??? |
| Sold | ??? | Serial Number | 000321 |
| Other Extras | None | Bought Where | Brugge |
| Bought When | March 25, 2002 | Condition | Good |
| Price Paid | 30 € | Specs of my Model | 2 Disk Drives |
| Setup Today | ??? |
TRS 80 Model 4-01: Bought via an ad on the internet (Brugge) on 25/03/2002 Paid 30 € for it ( 60 € for TRS 80 model III & TRS 80 model 4) |