Briel Computers


replica 1 tenth anniversary edition

by on Nov.28, 2013, under replica 1

R110As previously mentioned in the new replica 1 tenth anniversary edition is here. It’s hard to believe it has been 10 years since the replica 1 was created. In celebration of 10 years of kits, we have a limited edition replica 1 ten board. The new design is our sleekest and most modern design ever. The mini USB interface is not only a power source, but has a built in USB to serial interface allowing you to have a virtual COMM port on your PC. You can run your entire replica 1 from a USB port on your PC or from a USB power supply.R110 kit

The new replica 1 ten limited edition has a unique red color distinguishing it from prior versions. As such, we are limiting it to only 50 hand serial numbered units. Why 50? Well, that is the number of apple 1 computers believed to still be in existence. In order to maintain an economical kit with today’s rising component prices, we found ways to reduce components and made some hard choices too. Gone is the ATX power supply option along with the 40 pin replica 1 header, however, there will be ways to get these features as needed. Don’t have a USB power supply, we now offer a universal USB power supply R110 DIAGRAM

The new design allowed us to eliminate the 1MHz oscillator and now the Parallax Propeller controller generates the system clock. We added a larger EPROM so you can now select between the original BASIC or the new Applesoft lite. We were also able to reduce chip count using the Propeller to handle critical I/O glue logic processing.  All these changes makes it possible to not only maintain the price, but also makes a smaller, more efficient board.

Preordering is over, orders are being filled.

replica 1ten limited edition kit $149

replica 1ten limited edition assembled and tested $199

replica 1ten universal power supply and cable $19

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a2mp3 added to store

by on Aug.07, 2011, under a2mp3, News

Due to an oversite, the apple II mp3 player was never added to the store. That error has been fixed and you can order yours from the store.

Briel Computers Store

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A2MP3 workshop a huge success!

by on Jul.23, 2011, under a2mp3, News

I’m am please to report that the largest workshop that I have conducted concluded with all 17 units functioning. There are now 17+ KFest special edition 2011 a2mp3 cards out there playing all kinds of mp3 files. Really cool to hear podcasts on your apple II. Next month we will tidy up a few loose ends and get the card release to the general public. The code included is an open source demo program found on a prodos 140K image file here:


True programmers will be at work soon after KFest to write a better mp3 player program for both 8 bit models and the GSOS!


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Apple II MP3 card nears completion

by on May.24, 2011, under a2mp3, News

After a year on the shelf, the Apple II MP3 is nearing initial completion. The card is designed to work with most Apple II’s except the IIc line and allows you to play MP3′s from your flash pen drive. There are limitations to the device but it will play songs from the root directory of the flash drive. Other uses may include file transfer from flash drive to Apple II and sounds and songs for gaming applications. I’ll see if I can write up a blog before the workshop at KFest this year where you can build the MP3 kit in a workshop setting. Kansas jFest gets exclusive custom MP3 cards in a first time ever custom logo format. The Kansas Fest logo will be on the card and only available at the show.  The attendee’s will get first crack to make awesome software programs for the player and with all the outstanding bunch of programmers there, I’m sure it won’t be long before there are several apps available for the MP3 card. More information on KFest can be found on the website here:   KFest

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apple ll Super Encoder

by on Apr.03, 2010, under a2se


The apple ][ super encoder is a replacement board for the apple II and II plus computer keyboards that have the seperate encoder on an attached board on the keyboard. This product is not designed to work with the apple IIe/IIc or IIgs computers. If you have an original apple II or apple II plus you can open the lid and look under the keyboard. If there is a smaller board attached to the keyboard pcb than the super encoder board will replace it. Click on the Ordering tab to the left to order yours. This is a limited edition board.


So, what is the big deal with this super encoder? Well, it makes a nice replacement for those keyboards that have bad encoders. The other advantage is that it has a ps/2 keyboard port. With this port you can have 2 keyboards, the built in apple II keyboard and a standard pc keyboard. You can use both at the same time so it will be easier for two player games. Please note that the cable is NOT included. You can use the cable that is currently on the keyboard.

To install, you must unplug your apple II. Remove the screws around the outside of the case and carefully open up until you can access the keyboard cable. Carefully unplug the cable paying attention to the orientation so you don’t plug it back in backwards. Now you can lay the lid upside down on your work area to access the keyboard encoder. To seperate the encoder from the keyboard you must squeeze the white plastic tab of the post and gently seperate the two boards until the encoder slides all the way out. Remove the cable and install it on the new super encoder board. Install the super encoder as shown in the picture above so the chip is facing toward you and the pins face into the keyboard until the spacers lock into the holes. At this time you can attach a ps/2 keyboard cable or attach one at a later time if you wish.

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Altair 8800micro

by on Apr.03, 2010, under Altair 8800micro

altair 8800micro

System specs

Processor:    8080A emulated by ATmega8515 microcontroller

Speed:           16MHz emulating 8MHz processor

Power:          DC wall wart power supply

RAM:           32K Static expandable to 64K with 88-DSK RAM board

ROM:           none

Case:           Aluminum front/rear panels painted front with silkscreen artwork. Plastic top/bottom

Term:         VT-100 emulated terminal onboard (can be disabled to run external terminal)

Video:           80×40 VGA and 40×25 composite (can use both at the same time)

I/O:              Keyboard port, expansion slot, SD card slot for program storage

OS:               Altair 4K,  8K BASIC, Enhanced BASIC and CP/M (with 88-DSK RAM board)

Always wanted to build your own Altair but missed out during the 70′s? Well, now you can with the Altair 8800micro kit. It is a reduced size replica of the famous machine that inspired Bill Gates to start Microsoft. Program the emulated 8080 processor right from the front panel or run programs from a SDHC memory card!

Can’t solder, no problem. We offer a fully assembled and tested version for those who want to get started right away. Visit the store page to order yours.

The new 88-DSK RAM Drive gives your Altair 8800micro the capability to run CP/M in a virtual disk drive setting. The board contains 2 512K RAM drives that are battery backed. You can now load disk images stored on the SD card into the RAM drives and run CP/M software right on the Altair micro.

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4Meg GS RAM Card

by on Apr.03, 2010, under 4megGS

This is the 4MB RAM card for the Apple II GS. This card is the original and I am the original designer of these cards. It is a similar design to a card that was developed for Garberstreet Enterprizes a few years ago. After several requests to produce this card, the result is this new card. There is one minor difference between the Garberstreet card and this new design. They are tested on ROM01 GS systems with CFFA cards. They are not tested with speed enhanced systems or systems with SCSI cards. Boards have not been tested with other cards installed. The price of the card is $89 plus shipping for an assembled and tested board with RAM included.

Recently Juiced.GS did a review of the card
The Test:
  • Conducted by: Ewen Wannop
  • Tested system setup
  • Computer: Apple IIGS ROM 03
  • Acceleration: 12.49MHz Transwarp card
  • Storage: Apple High-Speed SCSI card, and CFFA card


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by on Apr.03, 2010, under PockeTerm

The PockeTerm is a 4″ X 2.5″ single board terminal that uses a VGA monitor and a PS/2 keyboard for its input and output. Dual serial ports gives the user the option of transferring data to/from a PC while still connected to the host device. This terminal was designed to work with vintage computers but is compatible with most systems including Unix and Linux systems. A low cost color choice terminal that has VT-100 compatible commands for controlling cursor and screen functions. Want to program the propeller microcontroller or install an update to the firmware? No problem, just connect the PockeTerm to your PC, run the Propeller Tools software and you can program it from your PC, no expensive Prop Plug required.

New PockeTerm Case

For only $24.95 you can assemble this nice looking case to complete your PockeTerm kit. Hurry, limited supply onhand. The kits come with all mounting hardware to mount your PockeTerm to the case. (PockeTerm is sold seperately).

The PockeTerm has a full featured screen with Function key status at the bottom of the screen. Click on the image for a full size photograph of the screenshot. The PockeTerm is a work in progress and we are trying to add as many features as possible. Updates can be emailed to the user or posted on the website.

  • CTRL-F1 Selects Baud Rate
  • CTRL-F2 Changes text color of the main display section
  • CTRL-F3 Turns on/off the 2nd serial port that connects to a PC.
  • CTRL-F4 Force incoming data to 7 bit ASCII. Strips the 8th bit, required for some systems
  • CTRL=F5 Change cursor type. Choose from underscore, solid block, or none. Also, choose from blinking or not.
  • CTRL-F6 Add line-feed to carriage returns

PockeTerm File Downloads

PockeTerm Firmware

This software is given on the hopes that it will be improved by the public. All revisioins show acknowldgement to the author of the changes. Please help make this a better product for all to enjoy.

PockeTerm firmware revision 0.905 NEW updated 4/6***

How to program firmware updates

Download and install the propeller tools from here (requires Windows 2000 or higher):

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replica 1

by on Apr.03, 2010, under replica 1

The replica 1 is a functional clone of the apple 1 computer created by Steve Wozniak in 1976. This was the computer that Steve Jobs and Woz created to start Apple Computers in 1976. The latest version of the replica 1 is labeled TE for Third Edition. The replica 1 functions exactly like the apple 1 with many of the same components like a 6502 CPU and 6821 PIA. It comes with 32K RAM and 8K EEPROM. Addtional features like a ps/2 port, serial, ATX power connector and DC wall power supply connectors makes the replica 1 a fully functional computer system for todays collector or hobby builder. Available as a kit or assembled, the replica 1 is sure to give you hours of fun and excitement as you relive the glory days of computing. As a new feature, a full blown assembler called Krusader written by Ken Wessen was added to the EPROM space giving the user the ability to assemble 6502 programs right on the replica 1 without a PC. Write 6502 machine code programs using mnemonics instead of just programming hex code into the memory. This added programming tool makes the repica 1 not only a nostalgic computer but a great learning tool and introduction to microprocessors.



replica 1 TE improvements

  • Apple 1 compatible 44 pin slot
  • Apple 1 compatible 44 pin edge connector
  • Bread board area for hobby experiments
  • Elimination of jumpers
  • Improved video display using Parallax Propeller (works with most TV’s and monitors)
  • No need for Apple 1 slot adapter because Apple 1 slot now onboard as well as original replica 1 connector
  • User firmware updates. User can download firmware updates and install. No need to send in for new chips.

Add-on accessories

  • Compact Flash Adapter board
  • Slot 1 Expander (3 apple 1 expansion slot board)
  • Multi I/O board

Other information

  • Applesoft Lite Apple II Applesoft converted for the apple 1 and replica 1
  • Apple 1 ROMS These are the Actual Apple 1 nybble ROM images


This is a block diagram of the replica 1. The idea behind the project was to keep the design down to a minimum of parts and yet still allow full compatibility with the Apple 1 computer.

 This chart shows the memory map of the replica 1. The zero page is identical to the Apple 1, and the main program RAM is increased from 4K to 32K. The area occupied with BASIC was previously RAM on the Apple 1 but now is EEPROM so BASIC is resident in ROM at all times. This makes for faster loading of programs. Krusader also is resident in ROM. These do not change the compatibility of the replica 1 with the apple 1 but makes programming the replica 1 much easier than on the apple 1.


This is a diagram of the pinout of the expansion connector on the replica 1. It is different than the apple 1 in a few ways. First, it uses standard IDC 40 pin connector like on a IDE hard drive. Secondly, there are only 40 pins instead of 44 because some of the pins on the apple 1 were not needed to replicate the computer.





The multi I/O board is an all-in-one solution that gives the user 2 8 bit bi-directional ports with 4 handshaking lines, a true RS232 serial port with speeds up to 19,200 BAUD, and a 8K EEPROM programmer to store data or programs. There is a socket to add your own speakjet voice chip that works in conjunction with the serial port to make your replica 1 or apple 1 speak! The speakjet is not included but can be purchased here.



The CFFA1 is a add on storage card for the replica 1 and apple 1 computers. It uses compact flash cards to allow you to load/store programs onto your replica 1 or apple 1 computer. The menu driven card has the ability to format, create 1 level deep subdirectories, load, save basic and assembly language programs. This is the only storage card you need for the replica 1.

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by on Dec.31, 2009, under Micro-KIM

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.


  • 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:

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:

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