Line of computers built mostly from scrap.
The line of JML computers is broken into “families”. Each family is designated by a number, for example the JML-8 family of computer. Each model in that family is further distinguished by a name, for example the JML-8-Mini.
Almost all parts have been scrapped from other computers/electronics. Many of these parts are from very old computers and are no longer on the market.
Modern day equivalents do exist, but it is necessary to be cautious about differing pin-outs. It may be necessary to design a new PCB for a modern chip, or at least a way to change pin-out.
Information about the different model computers can be found in any directory titled JML-{family}-{model}.
Below is a list of all families with a brief description of each family.
This is a family of 8-bit microcomputers designed around the Z80 microprocessor.
This model uses a UART serial port to communicate with a terminal. An FTDI chip can be used to send data from a computer to the Z80.
The “operating system” this model runs only allows for very simple commands. These commands allow the user to read the values at memory locations, write values to memory locations and transfer program control to a specific memory location. Additionally, there is a built in BASIC interpreter.