Posted By
szp
on 2011-06-07
16:40:15
|  sd2iec problem
I have bought an SD2IEC board from NKC Electronics. I have built it in my C16, but it's not working properly.
After power on the leds are flashing
I always get "device not found" error message.
The following program also cause the same,
10 OPEN1,8,15:INPUT#1,A$,B$,C$,D$:CLOSE1
20 PRINT A$,B$,C$,D$
I have try it with 8,9,10,11 device id number.
The followings i have tried already.
When i switch on the computer the two leds are flesh up and switch off.
I havent doughter board because, i have built it in computer.
I get +5v from cassette port.
I haven't connect DB pin 6,7 because i think the default setting are ok for me
DB pin 8,9 connected to the GND via switches
I have 1Gb maxell sd card. Can I test the board without SD card before i buy another one?
I have tried FAT, and FAT32 format also
Now I have recognise the T1 transistor is missing from the board. It's normal, or it can cause this problem? (I'm not an electircal guy maybe it's just optional)
Anybody can help me?
Magyarul is szívesen veszem a hozzászólásokat 
|
|
Posted By
SVS
on 2011-06-08
02:27:52
 | Re: sd2iec problem
Are you sure the command "OPEN1,8,15" is correct?
|
|
Posted By
szp
on 2011-06-08
03:18:45
| Re: sd2iec problem
no, i'm not.
i have read it from more documents, for eg. this:
http://www.vintagecomputercables.com/datasheet/sd2iec.pdf
But it's written to C64, maybe C16/+4 need another command?
Upss, the upper document containts OPEN15,8,15 but i have tried it also, even with different device number 9,10,11
|
|
Posted By
szp
on 2011-06-17
18:01:11
| Re: sd2iec problem
Do you think this command is wrong?
It's not working yet  (
I have found a 32MB Canon card, i'm sure it's compatible.
I have tried update firmware from this card, and it looks ok. (I think from led flashing)
But i always get "device not found" (
|
|
Posted By
SVS
on 2011-06-18
02:20:41
| Re: sd2iec problem
Try this sequence:
OPEN 15,8,15,"I"
OPEN 2,8,2,"$"
LIST
I suppose the device assumes 8 as dev. number, and no-other devices are linked to serial chain.
Let us know
|
|
Posted By
szp
on 2011-06-18
15:39:32
| Re: sd2iec problem
After the first command I get "device not present error"
Do you think this figure is correct about C16 serial port?
http://www.zimmers.net/anonftp/pub/cbm/schematics/computers/plus4/connectors-2.jpg
|
|
Posted By
szp
on 2011-06-19
05:52:50
| Re: sd2iec problem
I have changed my C16 CPU from another plus4, but the error is same
I'm afraid the sd2iec pcb is wrong, but nkc electronic doesn't answer to my email
|
|
|
