|HP Palmtops 100LX / 200LX - Technical information|
This is an informational page about the HP Palmtops.
You may also have a look at the following locations on www.hermocom.com:
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General information about the palmtop HP 200LX:The palmtop Hewlett Packard 200LX is the successor of the very famous 95LX and 100LX palmtops. Project names at HP were "Cougar" for the 100LX and "Felix" for the 200LX. The 100LX has been introduced in May 1993 with 1MB RAM, the 2MB version followed in February 1994.
The 100LX has basically the same software equipment, but older versions, and some programs are missing, e.g. Pocket Quicken. And due to the MS-DOS compatibility, the 100LX/200LX is expandable by many, many MS-DOS programs. The biggest HP palmtop software archive is the S.U.P.E.R. archive on www.hp200lx.net. Click here to view the HP 100LX FAQ page Click here to view the HP 200LX FAQ page
Information and pictures of memory configurations of upgraded and stock 200LX machinesThe HP 100LX and 200LX can have different memory configurations. The table below gives an overview of (almost) all possible configurations. Factory default means, that the machines are sold by HP with that configuration, upgraded means, that the machines can be upgraded by third parties to that configuration (Times2Tech or Rundel Datentechnik for example), no means that such a configuration is not possible and theoretically possible means, that no third party sells such an upgrade, but that it would be technically possible to create such a configuration. Note that the total amount of memory is always shared between storage memory and system RAM. System RAM can be up to about 640 kB, which would for example result in 1.4 MB C: drive space on a 2 MB machine. The upgrades from 32 MB up to 96 MB even create one or two more logical DOS drives on your palmtop, because in order to handle them, additional address lines must be used which are not used for RAM drives by default. The necessary lines from the CPU to the memory board are established by thin wires (see below) and a driver is loaded, which enables these address lines and lets you use the additional RAM as addidtional DOS drives. So, on most upgraded palmtops, the 32 / 64 MB drive has the drive letter F: (which can be swapped with C: by an additional little program). The 96 MB upgrade can result in either one or two additional drive(s), depending on the motherboard layout. In case of two additional drives, these are splitted into one 32 MB and one 64 MB drive.
Factory-default RAM configurationsThis is a 200LX motherboard with 1 MB RAM on-board and the socket for a memory daughter board:
This is a 200LX motherboard with 2 MB RAM on-board and the socket for a memory daughter board:
This is a 1 MB daughterboard from a 2MB 200LX (which has 1 MB on-board memory):
This is a 2MB daughterboard from a 4MB 200LX (which has 2MB on-board memory):
|Last Updated on Saturday, 06 November 2010|