We decided to take a DIMM-PC®/520-IE with AMD® Elan™ SC520 (133MHz) CPU from Kontron.
Due to the internally-set multiplier of 4, the core runs at 133 MHz. The combination of the relatively large 16 KB write-back L1 cache and 133 MHz clock speed allows the 5×86 to perform >= an Intel Pentium 75 MHz processor in integer arithmetic performance.
The Elan CPU comes with following architecture.
And last but not least the full feature list of our DIMM-PC
|CPU||AMD® Elan™ SC520 133MHz|
|Cache||16 kByte Write-Back L1|
|Common Features||JIDA Support, I²C Bus, Programmable / CS Output, Support for alphanumerical displays|
|Dimensions (H x W x D)||68 x 40 mm (2.7 x 1.6“)|
|Ethernet||10/100 MBit Ethernet|
|Flash Disk||IDE compatible Flash Disk up to 32 MByte on board|
|Hard Disk||IDE Hard Disk Interface on external device|
|Humidity||Operation: 10% to 90%
Storage: 5% to 95%, (non condensing)
|Interface||Floppy Interface single drive|
|JRC / JIDA32||JRC remote control via COM|
|Keyboard||Keyboard Controller integrated with chipset|
|Main Memory||Up to 32 MByte DRAM on board|
|Operating System||Preinstalled DR-DOS®, lol 🙂|
|Parallel Port||1 x LPT1, EPP support|
|Power Consumption||2 Watt @ 5V only|
|Real Time Clock||Integrated with chipset|
|Serial||2 x Serial TTL (16550 compatible)|
|Special Features||EEPROM for CMOS Setup|
|USB||Optional 1x USB 1.1 OHCI|
Our aim was to build an education system to show our students how PC systems are working and how easy it is to build a Linux OS from scratch for this kind of architecture. Secondly we want also to have a small development platform for third party projects.
With 32MB of DRAM and up to 32MB of IDE compatible hard drive and full featured I/O interfaces like serial port, LPT, IDE interface, Watchdog Timer, I²C Interface, General Purpose Chip Select and last but not least a beautiful Ethernet Interface suit all our needs for an easy to handle development platform.