These are just some random notes on some TRS-80 Model 100 things I own.

Dial-A-ROM

This packs 12 ROM images for the Model 100 (and three for the Model 200) into one physical package. You can select which ROM it presents to the system with a little 16-position rotary switch.

Switch	ROM Selection	Install	Remove / Exit
F	TS-DOS 4.10	`CALL 63013,1`	`DOS-OFF` and `KILL "TS-DOS"`
E	Cleuseau 1987	`CALL 63012`
D	Microsoft Multiplan 1.00	Self Install	Self Uninstall
C	SuperROM 1.8	`CALL 63012`	`CALL 63012,0,1`
B	ROM 2 / Cleuseau 1985	`CALL 63012`	`CALL 921,145`
A	Ultimate ROM II	`CALL 63013,1`	`KILL "UR-2"`
9	MForth	`CALL 63012`	`bye`
8	Not used
7	Interactive Solutions	`CALL 63012`
6	Log-It 100	`CALL 63012`
5	CardBox	`CALL 63012`
4	CARDFIL 100 V5.12	`CALL 63012`
3	RAM+ Model 100	`CALL 63012`

TS-DOS 4.10

TS-DOS provides a disk operating system for use with the TPDD (“Tandy Portable Disk Drive”). It also works with the Universal Backpack further down this page, which pretends to be a TPDD2 on steroids.

Manual

Multiplan

Quick Reference

SuperROM 1.8

This includes the following:

Lucid, a spreadsheet
Write Rom, a fully featured word processor
- Manual
- Quick Reference
Thought, an outliner.
- Manual
Lucid Data, a database
- Quick Reference

ROM 2 / Cleuseau 1985

MForth

Manual

Interactive Solutions

Manual

RAM+

RAM+ is a 128KB RAM expansion module for the Model 100. It gives you four 32KB memory banks that you can switch between, provided you have loaded the RAM+ ROM using the Dial-A-ROM.

Manual

Universal Backpack Drive

When combined with TS-DOS, provides a convenient way to save and load files from a MicroSD card.

There are a couple of things needed to get started with this. If you’ve got TS-DOS loaded from ROM, you’re pretty much good to go, but if not you’ll need to load TS-DOS from the drive using a bootstrap loader. That’s pretty easy:

Power off the Backpack Drive and plug it into the serial port.
Enter BASIC and type RUN "COM:98N1DNN" and press Enter.
Turn on the Backpack Drive.
After a few moments, you should see INITIAL PROGRAM LOADER II displayed, and after a while this should be followed by Installing TS-DOS.
After about 3 minutes or so, it should finish loading. Back in BASIC, type SAVE "TS-DOS"

Now you can execute the program TS-DOS.BA to load TS-DOS into RAM. It also leaves behind a file called TMP.DO, feel free to delete it.

No-Name MultiROM from eBay

This is really similar to the Dial-A-ROM, but it uses dip-switches to configure what ROM it presents.

0	1	2	ROM Selection
Off	Off	Off	TS-DOS
On	Off	Off	Ultimate ROM II
Off	On	Off	SuperROM
On	On	Off	ROM2/Cleuseau
Off	Off	On	MultiPlan
On	Off	On	MFORTH
Off	On	On	Interactive Solutions
On	On	On	TS-Random

In all of these cases, the ROM is activated with CALL 63012