remember the floppy disk 💾

Took a while to get the Greaseweasle I purchased working, However, the problem was really just that my floppy drive head was stuck from lack of usage and all that was needed was for me to unjam it (i.e. literally push it out with my finger). A lot of the jumper work were pointless. 

Nevertheless, the working jumper settings on my Matsushita JA-551-3 5.25" Double Sided Double Density drive via image:

Notes:

• Ribbon cable connect to the "A" connector (i.e. end of cable, after the crossover).

When using the TRS-80 Model 100 with The Old Net Serial Wifi Modem, set the terminal to 300 baud, 8 Bits, No Parity, 1 Stop Bit, and Software Flow Control.

"Software Flow Control" is sometimes called "XON/XOFF flow control", in contrast to "hardware flow control" like RTS/CTS and DTR/DSR.

On the TRS-80 M100, select TELCOM. For RS-232C communications, the configuration description consists of a five character string of the format rwpbs, where:

• r Baud Rate. This is a number from 1 to 9, where 1 = 75; 2 = 110 ; 3 = 300 ; 4 = 600 ; 5 = 1200 ; 6 = 2400 ; 7 = 4800 ; 8 = 9600 ; 9 = 19200. M may be used. M sets built-in modem to 300 baud.
• w Word Length. This is a number from 6 to 8, where 6 = 6 bits; 7 = 7 bits; 8 = 8 bits.
• p Parity. Either E,O,N, or I where E = Even ; O = Odd ; N = None; I= Ignore.
• b Stop Bits. Either 1 or 2, where 1 = 1 stop bit; 2 = 2 stop bits.
• s XON/XOFF Status. Either E or D, where E = Enable; D = Disable.

To set up for use the wifi modem:

stat M8N1E

And then hit (Term - F4) Puts TELCOM into the Terminal Mode. And then you can do your AT commands.

Note: On the wifi modem the baud rate is set to 600 baud perhaps: Hold the Flash button down on the modem for 5 seconds and it will reset to 300 baud (one time). 

References: 

The TRS-80 Model 100 Quick Reference Guide
Old Net Wifi Modem Manual

First post. I think this title makes sense.

Here's a photo of a Laser 128/EX I have: