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The Palm m100 series consists of four Palm OS based 
personal digital assistants
A personal digital assistant (PDA), also known as a handheld PC, is a variety mobile device which functions as a personal information manager. PDAs have been mostly displaced by the widespread adoption of highly capable smartphones, in partic ...
(or PDAs) titled m100, m105, m125, and m130. These models were intended to be "entry-level" PDAs, and therefore their cases were built from cheaper materials. Most notably, the covers of the LCD screens and the digitizers were plastic rather than glass, and the screens were smaller than the more expensive Palms on sale at the time.
Unlike some other Palm computers, which had rechargeable batteries, they were designed to run on standard dry cell
upLine art drawing of a dry cell: 1. brass cap, 2. plastic seal, 3. expansion space, 4. porous cardboard, 5. zinc can, 6. carbon rod, 7. chemical mixture
A dry cell is a type of electric battery, commonly used for portable electrical devices. Un ...
batteries (except for the m130, which uses a rechargeable battery). Data preservation during battery changes occurred via a capacitor.
There was a hinged flip screen cover with a small window over the screen through which the system clock can be viewed for a few seconds when the "scroll up" button is depressed through a hole in the cover, when the unit is not in use.
Specifications
The m100 is powered by the Motorola EZ Dragonball processor operating at 16MHz
The hertz (symbol: Hz) is the unit of frequency in the International System of Units (SI), equivalent to one event (or cycle) per second. The hertz is an SI derived unit whose expression in terms of SI base units is s−1, meaning that one he ...
and has 2 Megabytes of RAM. It was released in August 2000, and originally shipped to customers with Palm OS 3.5. It is 4.66 inches high, 3.10 inches wide, and 0.72 inches thick. It weighs 3.7oz without batteries or screen cover. It came with a serial cable to sync with a computer and a CD-ROM
A CD-ROM (, compact disc read-only memory) is a type of read-only memory consisting of a pre-pressed optical compact disc that contains data. Computers can read—but not write or erase—CD-ROMs. Some CDs, called enhanced CDs, hold both comput ...
with Palm Desktop software. It has a durable plastic screen that will withstand falls better than glass screens, and it comes with a hinged screen cover that hangs over the screen when not in use.
The m105 is identical to the m100 but it contains 8 Megabytes of RAM, and in the box a cradle is included instead of a cable. It was released on March 6, 2001, and originally shipped to customers with Palm OS 3.5. The m105 had a problem whereby the capacitor that saved the contents of the RAM when changing batteries would fail. Several hardware hacks are available that fix this error.
The m125 is powered by the Motorola VZ Dragonball processor operating at 33 MHz. It has a 160x160 pixel greyscale LCD screen and 8 Megabytes of RAM. It was released in September 2001, and originally shipped to customers with Palm OS 4.0.1. The cradle connection and expansion port differs from that of the earlier models, and is identical to that of the Palm m500 series The Palm m500 series of handheld personal digital assistants consisted of three devices: the Palm m500, Palm m505, and Palm m515. The series was a follow-up to the popular Palm V series with a similar, though slightly shorter, footprint and form fac ...
, and this model shipped with a synchronization cradle that connected to the USB port (M100 and M105 connected via the PC's serial port.) This handheld also features a memory slot which takes an SD or MMC format external memory. The Palm m125 is the last PDA manufactured by Palm that accepts user-replaceable AAA batteries.
The m130 is also powered by the Motorola VZ Dragonball processor operating at 33 MHz. It has a 160x160 pixel LCD screen that supported 12-bit color. It was released on March 4, 2002, and was originally shipped to customers running Palm OS 4.1.
References