Well, I’m farther than I thought I would get today. All of the data from the Wiki has been moved and I will leave up the old pages until there are no more links coming from there any longer. The fresh new look should be fun for everybody and the ugly old wiki pages are done! I still have a lot to do including more links and more data to upload for users to have access to.

Order Assembled: $149.00

Order Kit: $99.00

Introducing the micro-KIM. The micro-KIM is a clone of the KIM-1 created by MOS Technology in 1975 as a development board for the 6502 CPU. The micro-KIM uses many of the same components as the KIM-1 to give it that authentic vintage feel. No custom components are used and the micro-KIM is designed with off the shelf parts. As an improvement to the original KIM-1 the RS-232 interface is included onboard to make I/O easier. Some components on the original KIM-1 are no longer available. The 6530 RIOT included a custom programmed ROM and has been replaced by a 6532 RIOT and an external ROM. The custom 23 key keypad is onboard with tactile switches giving the micro-KIM a compact size. A total of 5K RAM is on board with an expansion header for future expansion of memory or add-on boards. With a projected selling price of $99 the micro-KIM is one of the most affordable 8 bit computer kits available today. As a matter of fact, the micro-KIM was designed around the student market in an effort to offer students and schools a low-cost 8 bit CPU trainer.

SYSTEM INFORMATION

• 6502 CPU running at 1Mhz
• 2K EPROM replacing built in ROM on 6530’s
• 5K RAM using the KIM-1 memory map
• RS-232 interface made to work with TTY interface built in KIM-1
• Single-Step mode for debugging
• Debounced RESET and STEP switches
• 40 pin header for future expansion
• I/O of the 6 digit display and keyboard are memory mapped exactly like the KIM-1 for full program compatibility.

• Most pins are standard 8 bit signals but a few are custom signals. DEN is Decode Enable. It is the enable line for the onboard Memory. This is connected to JP1 onboard.
• IO3 is the decode line for the 2nd 6532 as an option. Preaddressed at $1700-173F
• TAPE is a required line for finishing the cassette tape interface
• PB7 is the 7th bit of I/O port B on the onboard 6532

Add-on Accessories:

 
 Order Assembled: $35.00

Order Kit: $25.00

32K RAM CardThe 32K RAM card is an optional card that increases the total RAM on your micro-KIM from 5K to 37K. The extra 32K is addressed from $2000-9FFF in memory because most of the programs available including floating point BASIC reside in $2000-up. When installed, JP1 jumper needs to be removed so the RAM card can decode memory. Current price is $25 for the kit that you solder yourself and $35 for the assembled and tested board.

Micro-KIM user manual: http://www.brielcomputers.com/files/mkmanual.pdf