At the time this writing, kits are being made avialable for the 1802/Mini boards to make it easier for builders to not have to obtain parts from multiple sources and identify substitutions where needed. Please contact the designer, David Madole (david@madole.net), for current availability as kits are made in batches as there is demand.
For more information on design, schematics, errata, notes for builders, etc., please see the project information on Gihub at github.com/dmadole/1802-Mini.
Kits include all parts needed to build a complete card including chips, passive components, connectors, and standoffs for stacking. You will need to supply the necessary tools, solder, and cleaning supplies and other consumables for building, as well as a power supply to operate the machine.
Within reason, custom kits can be provided if you already have some of the parts and do not need a complete kit. Please contact with your specific request. Note that certain parts in the kit may be used recycled components due to lack of reasonable avilability of older parts, but almost all are new and purchased directly from manufacturers or authorized distributors.
Any additional notes about parts specific to cards will be found below, as well as any notes of anything additional you may need.
Please see the individual notes below for costs, which are subject to change, and shipping costs are additional.
There is now a supported backplane for those who wish to build their systems in this form factor rather than via stacking of cards. When assembling for stacking, each card is assembled with long-tail socket connectors, but when for a backplane, a male pin header is used instead. Therefore, kits should be ordered specific to the assembly method to be used.
The prices and BOMs shown here are for cards to be stacked; for a card kit for backplane use instead, the connectors can be substituted for a reduction in cost of $5.00 US for the processor and front panel cards (which use one stacking connector), or a reduction of $8.00 US for peripheral cards (which use two stacking connectors).
The processor card includes 32K RAM and 32K EEPROM. The EEPROM will come pre-programmed with a current Elf/OS installer image if ordered with a compact flash interface card, or with a Mike Riley Disk-less ROM image otherwise.
For processor cards only or smaller systems of just a few cards, the 1802/Mini may be powered from the Mini-USB connector on the processor card. For larger expanded systems, it is recommended to supply power through the expansion bus connector. Note that the front panel card draws significant power due to the TTL display devices, a power supply should be capable of 1 amp minimum and 2 amps is better. A power supply is not included.
At the time of this writing, the processor card kit is $50.00 US and includes a 1990's Harris CDP1802ACE processor.
A bill of materials is avilable of the components included with the kit, and a representative photo below:
The front panel includes all components needed to build the card. As the front panel needs to be the top card in a stacked system, the expansion connection is a "short tail" connector rather than a "long tail" like the other cards since nothing can be stacked above.
At the time of this writing, the front panel kit is $90.00 US. If you do not need the TIL311 displays, they can be deleted and the price reduced to $60.00 US.
A bill of materials is avilable of the components included with the kit, and a representative photo is below:
Note: The photo above has an incorrect wrong packet of sockets shown. There are actually eleven 14-pin sockets includedin the kit, not five as shown.
The compact flash interface card contains all components including a 256MB compact flash card. The card is shipped blank but Elf/OS can be installed from the installer ROM included with the processor card when it is ordered with a compact flash interface.
At the time of this writing, the compact flash interface kit is $50.00 US. The compact flash card connector on this board is a 50-pin 0.05-inch pitch through-hole connector. If you are not comfortable soldering the fine pitch, this connector can be soldered for you before shipping for $10.00 US additional charge to cover time and materials.
A bill of materials is avilable of the components included with the kit, and a representative photo is below:
The 1854 serial interface card contains all components including a tested surplus CDP1854 UART as well as all three connectors. Software support is provided both via a basic "Mike Riley" BIOS driver and also an advanced interrupt-driven sotware loadable driver for Elf/OS. The software driver has buffered receive and supports flow control.
At the time of this writing, the 1854 serial interface kit is $50.00 US.
A bill of materials is avilable of the components included with the kit, and a representative photo is below:
This card allows 1802/Mini peripheral cards to be used on the Quest Super Elf. The kit contains all components needed to build the card itself, but not the ribbon cable or 50-pin connector for the Super Elf itself. If a ribbon cable is needed, an 8-inch 50-pin rainbow cable is available for $5.00 US additional.
At the time of this writing, the Super Elf bus adapter kit is $50.00 US.
A bill of materials is avilable of the components included with the kit, and a representative photo is below:
This card supports the TMS9XXX series video processor chips on the 1802/Mini to output color video images. The kit supports either TMS99XX or TMS91XX series chips through two selection jumpers. The full kit supports component YCrCb video output in either NTSC (with TMS9X28) or PAL (with TMS9X29) format. There is also a simplified, reduced-cost kit supporting NTSC composite only (with TMS9X18) output. The full component video kit can also output composite by swapping the video processor chip.
At the time of this writing, the full component and composite NTSC video card kit is $70.00 US. This includes a TMS9X18 and a TMS9X28. The component-only PAL kit is $60.00 US and includes a TMS9X29, and the kit supporting NTSC composite only is $50.00 and includes a TMS9X18.
A bill of materials is avilable of the components included with the kit, and a representative photo is below:
This card expands the memory of the 1802/Mini to up to 96K by adding an additional 32K bank of RAM which can be split partway through the bank allowing for variable ROM footprints. It also provides a five-group two-level I/O port expander allowing up to 30 I/O ports to be used, as well as a battery-backed real-time clock.
At the time of this writing, the expander card kit is $50.00 US.
A bill of materials is avilable of the components included with the kit, and a representative photo is below:
This provides for an alternate form factor to the default assembly method of stacking 1802/Mini cards by instead using a 7-slot blackplane. This kit is for a full base backplane with power, reset, and input buttons, and connectors for 7 slots. If you have a front panel, you may want to leave off the reset and input buttons since they duplicate functionality of the backplane.
The same PCB can also be used with different components to create a 7-slot backplane expander to chain to the base kit to create larger backplanes, and can also be used to create a slot extender. Please email for details on these configurations.
Note that use of the backplane requires different connectors on each of the 1802/Mini cards installed that would be used for stacking; please see the note in the introductory information at the top of the page. For group port selection with an expander card in a backplane-based system, a group bus cable will also be needed, please see the separate entry below.
At the time of this writing, the full base card kit is $70.00 US.
A bill of materials is avilable of the components included with the kit, and a representative photo is below:
For use with group port selection with an expander card, a ribbon cable to chain the group bus will also be needed. A 5-pin, 6-slot cable is available which supports all the lines provided by the expander card.
This cable is available pre-assembled, supports chaining up to 6 slots, and is $15.00 US. This price is for a single cable, the photo below is of a cable from two angles, for clarity.
This is a simple adapter that will interface a PS/2 type keyboard to an Elf system using the Q and one EF line (usually EF2). Note that the software support for this is limited at this time, but it is supported already by my "pstwo" video driver for Elf/OS that also works with the TMS9XXX video kit. It is intended that support for this will be available soon in BIOS for use as a boot console if desired.
At the time of this writing, the PS/2 Keyboard Adapter kit is $10.00 and includes a cable suitable for the 1802/Mini (or RC/1802) processor card. It can be shipped with a cable for the Super Elf card instead if requested, and can work with other Elf machines with a suitable user-supplied cable.
A representative photo is below:
