Max-80

Max-80

Manufacturer	Lobo Systems
Type	Personal computer
Release date	1982; 43 years ago (1982)
Media	External disk drive
Operating system	LDOS and CP/M
CPU	Zilog Z80-B @ 5.07MHz
Memory	64K, 128K max
Removable storage	Floppy Disks
Display	Composite video out; 64x16 or 80x24 characters

The MAX-80 is a personal computer released in 1982 by Lobo Systems (formerly Lobo Drives International, a company from California).[1][2] It differed from other TRS-80 compatible computers in that it was not hardware compatible with the TRS-80.[3][1]

Hardware

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 64KB of RAM, and was expandable via sockets for a further 64KB.

The standard configuration originally consisted of a 64KB unit (later 128KB) and CP/M. The user could buy a complete system, or provide their own monitor and disk drives.[3]

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.[1]

Software

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.[3]

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.[3]

Community

A users' group called MAXIMUL published a MAX-80 newsletter.[4] MAXIMUL actually outlived Lobo Systems, lasting until 1989.[3]

Reception

Jerry Pournelle wrote in September 1983 that if the Max-80 came with more bundled software "it would be a strong contender for the best deal in microcomputerland. As it is, it's a lot of machine for the money". He recommended that customers join Maximul.[4]

References

1. "The Lobo MAX-80". www.trs-80.org. Retrieved 2023-03-27.
2. "LOBO DRIVES INTERNATIONAL". opencorporates.com. Retrieved 2023-03-27.
3. Reed, Matthew. "The Lobo MAX-80". Retrieved 2010-11-24.
4. Pournelle, Jerry (September 1983). "Eagles, Text Editors, New Compilers, and Much More". BYTE. p. 307. Retrieved 2019-04-07.

External links

• Lobo MAX-80 at Oldcomputers.net
• The Lobo MAX-80 at trs-80.org
• Lobo Drives International MAX-80 at Old-Computers.com
• LDOS and Me- By Tim Mann