SBC-85 8085 Single Board Computer v2.0b, 22-pins I/O, Timer, RS-232, 8KB+ RAM, expansion bus - BARE BOARDDesigned by SBC-85 in United States of America
This is for the purchase of the BARE BOARD ONLY. The completed project is only shown for reference. FOR GOLD, SELECT IN 'PLATING' OPTION New for version 2.0b The floating ground on the DB9 is correc…Read More…
This is for the purchase of the BARE BOARD ONLY. The completed project is only shown for reference. FOR GOLD, SELECT IN 'PLATING' OPTION
New for version 2.0b The floating ground on the DB9 is correct in version 2.0b. See user manual for additional details
New for version 2.0 (see video) are two universal EPROM sockets provide 2x2732, 2x2764, 2x27128, or 1x27256 EPROMs, one socketed on the board and the second in a ZIF for easy swap. Note that the memory map has changed from v1.x of the CPU board so programs will need to be re assembled/compiled. The v2.x memory map is on the schematic and user's manual on the sbc-85.com project website.
The SBC-85 CPU board is a 100mm x 100mm 2-layer with a 120 pin edge connector (mechanically PCI). The serial SID and SOD lines, via a max232, offer a RS232 serial port for communication with a resident monitor or whatever you may decide to put in firmware. The 120 expansion bus includes power, all of the 8085 status and system signals, latched address bus, and many more unused terminals for future or other board-to-board signals.
RAM is provided by a 64-kBit 6264 and an additional 2kbit in the 8155. In addition to the additional RAM, the 8155 provides an onboard timer and 22 pins of I/O.
Power is provided by an external regulated 5V power supply through either the barrel connector or the backplane.
INTERNATIONAL SALES: We would really, really encourage anyone out side of the US to submit an order directly to the PCB house. we can walk you through every step of the way. In the end, it will be far cheaper to get 5 pieces from the PCB manufacturer than to ship from the US. As backwards as it sounds, the USPS subsidizes shipping into the country but we pay a premium to get things out of the country. We have limited international sales to our ebay store where we use the ebay international shipping programs. Please search there for SBC-85 computer and the items should show up.
Other boards including the backplane, cassette interface, prototyping board, bus monitor are also available. More information is available at the project website SBC-85.COM
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