Final Assembly and Checkout
From Spare Time Gizmos' Wiki
(Difference between revisions)
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* If you are installing a VT6 module, remove the front panel, install the VT6 with its spacers on the circuit board, and replace the front panel. | * If you are installing a VT6 module, remove the front panel, install the VT6 with its spacers on the circuit board, and replace the front panel. | ||
| - | * Insert the | + | * Insert the EPROMs into their sockets. |
| - | □ - U6, | + | □ - U6, 27C256R OTP EPROM “BTS6120 HIGH”<br> |
| - | □ - U7, | + | □ - U7, 27C256R OTP EPROM “BTS6120 LOW” |
* Insert the GALs in their sockets. | * Insert the GALs in their sockets. | ||
| - | □ - U4, ATF22V10CQZ, | + | □ - U4, ATF22V10CQZ, “RCMEM1”<br> |
| - | □ - U31, ATF22V10CQZ, | + | □ - U31, ATF22V10CQZ, “RCMEM2”<br> |
| - | □ - U13, ATF22V10CQZ, | + | □ - U13, ATF22V10CQZ, “RCIOT1”<br> |
| - | □ - U14, ATF22V10CQZ, | + | □ - U14, ATF22V10CQZ, “RCIOT2” |
* Install the HD6120 CPU IC at U1. Be careful and make sure that all pins go into the socket properly. | * Install the HD6120 CPU IC at U1. Be careful and make sure that all pins go into the socket properly. | ||
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* Install the BR2325 Li coin-cell in the holder labeled 'B1'. The positive terminal should be UP. | * Install the BR2325 Li coin-cell in the holder labeled 'B1'. The positive terminal should be UP. | ||
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* Measure the resistance across D1 with the positive lead of the ohmmeter at the banded end. Resistance should be 1K or more. | * Measure the resistance across D1 with the positive lead of the ohmmeter at the banded end. Resistance should be 1K or more. | ||
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* Attach the console jack to a dumb terminal or to a PC's serial port using a straight-through RS-232 cable. If you are using a PC use a terminal program such as hyperterminal. Set the terminal program to 9600 baud, 8 data bits, one stop bit, no parity. The baud rate setting of your terminal program should match the baud rate setting of the BAUD jumper block. | * Attach the console jack to a dumb terminal or to a PC's serial port using a straight-through RS-232 cable. If you are using a PC use a terminal program such as hyperterminal. Set the terminal program to 9600 baud, 8 data bits, one stop bit, no parity. The baud rate setting of your terminal program should match the baud rate setting of the BAUD jumper block. | ||
Latest revision as of 14:57, 31 July 2012
Begin the final assembly and testing of your SBC6120-RC with these steps.
- If you are installing a VT6 module, remove the front panel, install the VT6 with its spacers on the circuit board, and replace the front panel.
- Insert the EPROMs into their sockets.
□ - U6, 27C256R OTP EPROM “BTS6120 HIGH”
□ - U7, 27C256R OTP EPROM “BTS6120 LOW”
- Insert the GALs in their sockets.
□ - U4, ATF22V10CQZ, “RCMEM1”
□ - U31, ATF22V10CQZ, “RCMEM2”
□ - U13, ATF22V10CQZ, “RCIOT1”
□ - U14, ATF22V10CQZ, “RCIOT2”
- Install the HD6120 CPU IC at U1. Be careful and make sure that all pins go into the socket properly.
- Take a jumper block and place it over the pair of pins in the BAUD box to select the desired baud rate. 9600 baud is a good place to start.
- Install the BR2325 Li coin-cell in the holder labeled 'B1'. The positive terminal should be UP.
- Measure the resistance across D1 with the positive lead of the ohmmeter at the banded end. Resistance should be 1K or more.
- Attach the console jack to a dumb terminal or to a PC's serial port using a straight-through RS-232 cable. If you are using a PC use a terminal program such as hyperterminal. Set the terminal program to 9600 baud, 8 data bits, one stop bit, no parity. The baud rate setting of your terminal program should match the baud rate setting of the BAUD jumper block.
- Set the front panel register display rotary switch to the POST position. This causes the system to display the power-on self-test (POST) codes in the leftmost three LEDs of the register display. This will be useful should there be a problem discovered during start up.
- Apply power to the SBC6120-RC2 using a current-limited power supply set to provide no more than 500mA.
- Verify that current drain is in the range of 200 mA to 350 mA. (Current varies depending on how many LEDs are illuminated.)
- The terminal should display the monitor start-up message. If it does, congratulations! Your SBC6120-RC2 is now operational! Have fun using the PDP-8, the very first personal computer.
- If the terminal does not display the monitor start-up message, check the POST LEDs for the POST code. They will provide a general indication of where the problem might lie.
Congratulations! Your SBC6120-RC is now assembled and working. You'll probably want to read Using the Front Panel next.
