Description
The IBM 5100 is based on a 16-bit processor module called PALM (Put All Logic in Microcode). The IBM 5100 Maintenance Information Manual also referred to the PALM module as the controller. The PALM could directly address 64 KB of memory. Some configurations of the IBM 5100 had Executable ROS (ROM) and RAM memory totalling more than 64 KB, so a simple bank switching scheme was used. The actual APL and/or BASIC interpreters were stored in a separate Language ROS address space which the PALM treats as a peripheral device. Prices ranged from $11,000 (16k model) to $20,000 (64k).
Read more about this topic: IBM 5100
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