|Media||External disk drive|
|Operating system||LDOS and CP/M|
|CPU||Zilog Z80-B @ 5.07MHz|
|Memory||64K, 128K max|
The MAX-80 is a personal computer released in 1982 by Lobo Systems (formerly Lobo Drives International). It differed from other TRS-80 compatible computers in that it was not hardware compatible with the TRS-80.
The MAX-80 featured a Zilog Z80-B CPU which ran at 5.07 MHz, a very fast speed for its time. It came standard with 64k of memory, and was expandable via sockets for a further 64k. The standard configuration originally consisted of a 64k unit (later 128k) and CP/M. The user could buy a complete system, or provide their own monitor and disk drives.
The floppy disk controller could handle 8 inch drives using the standard IBM 3740 format in single-sided or double-sided modes, as well as 5.25 inch floppy drives with up to 80 cylinders. The Max-80 included a hard disk interface and two RS-232 serial ports. The Max-80's character generator was user programmable.
Up to 95% of TRS-80 Model III software would function without modification on the MAX-80. This did not include games. The special version of LDOS used was able to run most Model III programs with a patch disk available for those, such as VisiCalc, which it couldn't. The CP/M operating system was offered as well.
A patched version of the TRS-80 Model 4's LS-DOS 6.x operating system was later made available for the Max-80. This was called MAXDOS.