This machine could also read IBM formatted Mainframe and data entry unit disks.
This is the same techiique the IBM PC and other clone 8-bit machines achieved 640K of memory (10 banks of 64K). The machine had the capacity in hardware to utilize multiple 64K banks of memory but this was never implemented in production software. Options for the machine included a hard disk controller, an arcnet network card, a graphics card and a 0 board set with extra memory (up to 512K) so it could run XENIX.Īctually, there was a Hi-Res Graphics Mode for this machine, which mapped every pixel on the screen (still in monochrome). It runs under TRSDOS, but can also achieve CP/M compatibility. It is also possible to connect up to 4 floppy disk units, so you could have 2MB disk space online !
Thus it is equiped with a full height Shugart 8'' drive with a capacity of 500k which is a lot compared to the 87k offered by the TRS-80 Model 1 system disk. This is maybe because the TRS-80 Model 2 was intended to be a business computer for use in offices and labs. Many internet pages deal with the models 1,3 and 4 but omit the model 2. The TRS-80 model II, is the obscure brother of the TRS-80 family.
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