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The three most common reasons why you can't program a micro in the DT006 Board.
  1. Cable not correct. It must be a 25 wire cable.
  2. Software configuration not correct. In Bascom, it must be the Sample programmer.
  3. Printer Port not set correctly in your PC Bios.
Any PC parallel printer port can be used to program the chip. You will need a DB-25-male to DB-25 female cable with at least pins 2, 4, 5, 11, and 25(Gnd) connected straight through between the DB-25 male and the DB-25 female. Standard DB-25 male to female extension cables that have all 25 wires connected straight through, are fine for this job. 

Having trouble programming a SimmStick with the DT006? Read J14 again:
J14 MOSI/MISO in/out crossover to Simm Bus.
4 pin (2 x 2) header. Two Links.
To be able to program a SimmStick via the Simm Bus, you will have to link J14 pin 1 to pin 2, and J14 pin 3 to pin 4. This means the links must be horizontal, or point towards the Simm socket. If you need to swap these signals, simply position them vertical.

Having trouble programming a SIMM100 SimmStick with the DT006? Read the SIM100 instructions again.
You need to install jumper J6 (Rev.B board only) or jumper pin 1 & 6 of IC3 (Rev.A board only) , so the reset signal reaches the microcontroller.  You can't reset the MCU "outside" of the SIMM100 board which is neccessary for  programming.

What you can do with the SimmStick slots?

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