Subject:
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Re: Assembling the HandyBoard
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Thu, 26 Dec 1996 04:19:44 GMT
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Original-From:
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Fred G. Martin <fredm@media.mit.%StopSpam%edu>
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Viewed:
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1637 times
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> A couple of things have not worked quite right:
> 1. Couldn't find the 2.2M resistor that should be put across the crystal.
> However,
> the dc voltage at the 6811 E pin is 2.5V as required in the test
> instructions 4.3.2.
You need that resistor to stabilize the crystal frequency. Try Radio
Shack if it is missing from the kit. It doesn't have to be 1/8 watt,
1/4 or 1/2 watt is fine, just make sure it is 2.2 megaohm.
> 2. We assemble the Serial Line and Stop Switch (4.4).
> The first part of the testing (4.4.2) went well: The BATT LED cycles on
> and then off.
> The PWR LED turns off when the BATT LED turns off.
> 3. We connected the main board to I/C board through the phone cable. The
> HB
> goes into bootstrap mode - we turned it on while holding down the STOP
> switch.
> The PWR & BATT LEDs came on for a moment and both turned off.
So far so good.
> 4. Tried downloading pcode_hb.s19, using hdbl. We got the message Wrong
> port
> or board mode.
> Tried using dl in MS-DOS box:
> Using the floppy that came with the kit:
> Typed dl pcode_hb.s19 -port com2
> It time out on serial receive.
> Next, we used the beta version of ic and tried to dwon load the
> bootstrap program.
> Still - no luck - I keep getting the message:
> Please press the reset button.
> Should we continue and put the memory etc. on the board?
There is probably nothing wrong with your board (at least, that the
resistor won't fix), but you won't have any luck progressing until you
get a downloader working.
Try DLM.EXE from the hb software web page. Give it the args "dlm
pcode_hb.s19 -port com2 -256" to make sure it uses the 256 byte
downloader required for the 'a1 chip.
does the green light on the serial board flash when dl attempts
download? It should.
-Fred
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Message has 1 Reply:
 | | Re: Assembling the HandyBoard
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| (...) I was getting similar behavior with my board. It wasn't clear to me that pins 2 and 3 in the serial cable from the PC to the interface board should be switched. Credit goes to Mike Ross for helping me figure this out. Once I switched these two (...) (28 years ago, 27-Dec-96, to lugnet.robotics.handyboard)
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Message is in Reply To:
| | Assembling the HandyBoard
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| Hello all: We got the handyboard assembly kit from Digital Micro Systems. We are putting it together now. Everything has gone well. Thanks, the instructions are really good. A couple of things have not worked quite right: 1. Couldn't find the 2.2M (...) (28 years ago, 25-Dec-96, to lugnet.robotics.handyboard)
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