I/O Interface For Netronics ELF II Microcomputer Trainer, ACI-1, RCA COSMAC 1802

Appearance: Used
Description:============As pictured, an I/O Interface for the Netronics ELF II computer. Includes only the pictured board – no other accessories are available.
Warranty and Returns:=====================We understand that there may be compatibility issues, space constraints, or it just doesn’t look perfect. This item can be returned within 14-days for ANY reason. However, shipping to and from is not refundable.
Shipping:=========- Other shipping methods are available – contact us for details.- Combined shipping is available for most items – contact us for details.- Local pickup is also available at no cost.
Stock#:C1630.GG#1
Details from wikipedia:
The Netronics ELF II was an early microcomputer trainer kit featuring the RCA 1802 microprocessor, 256 bytes of RAM, DMA-based bitmap graphics, hexadecimal keypad, two-digit hexadecimal LED display, a single \"Q\" LED, and 5 expansion slots. The system was developed and sold by Netronics Research and Development Limited in New Milford, CT, USA.[1]
HardwareAvailable hardware accessories included:
The \"Giant Board\" (ROM monitor, serial and parallel I/O, Cassette interface)4KB and 16KB (static) RAM boardsLow-resolution color graphics board\"Full BASIC\" board with BASIC preloaded in ROM chipsEPROM burner boardExternal power supplyAttractive, heavy-duty metal cases for the CPU and power supplySoftwareAvailable software included:
Tiny BASIC (integer BASIC interpreter)[2]Text EditorFull BASIC (floating point BASIC interpreter using Reverse Polish Notation)Notable FeaturesUnlike similar \"bare circuit card\" trainer/experimenter computers of the day, the ELF II could be easily expanded thanks to its built-in bus.Memory mapped TV graphics was provided in the base kit by the CDP1861 \"Pixie-Graphics\" chip. Pixels were large. With unexpanded 256 byte memory, the interrupt routine needed to service the chip showed on the screen.The \"Full BASIC\" ROM card provided an RPN calculator chip as a simple and low-cost math coprocessor. As a result, floating point operations were an order of magnitude faster than what was possible in software. However, the BASIC syntax for math was non-standard as it used postfix RPN (see code example below). Historically, this was also the heyday of Hewlett-Packard calculators, so it was a fair bet that any technically-minded person willing to assemble a computer either already knew RPN or could easily learn it and adapt.10 REM This program will print the number 3020 A=10,B=2030 C=A#B+40 PRINT C50 ENDIn the code above, the \"#\" symbol is equivalent to the \"Enter\" key on a RPN calculator.