matze79 wrote:

Is Anyone are intressed into a building Kit or a fully assembled Card ?

Building kit would be awesome!

how much a kit shipped in DE would be?
the cards look ace 😎

matze79 wrote:

Is Anyone are intressed into a building Kit or a fully assembled Card ?

Maybe i will make a limited amount of kits.

These cards look really nice. I would be interested in a fully assembled card. Please let me know when you are ready to prepare one. Thanks for the offer.

keropi wrote:

how much a kit shipped in DE would be?
the cards look ace 😎

Based on sentence structure, I suspect your business trip has you thinking in German? 🤣

around 35€ ~ i don't have made excact calculations until now.

i have a few of the last batch avaible (ready cards), which i can give away.
The difference between the building kit version will be minor 😀
just some small adjustments.

In a few weeks I will also have two cards. One will stay with me. If the second works as well, I will create a little giveaway contest. 😀

matze79 wrote:

around 35€ ~ i don't have made excact calculations until now. […]
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around 35€ ~ i don't have made excact calculations until now.

i have a few of the last batch avaible (ready cards), which i can give away.
The difference between the building kit version will be minor 😀
just some small adjustments.

That's a fair price. I can't buy one right now but i'll definitely want one in the future. I think i have spare SN76489 chips laying around in my parts bin.

Very keen to get my hands on one of these in some form or another, they're looking great!

i started working on a small program, for muting channels.
its annonying to have 3 com files, each for for a address.
its working 😀

Here is new MS-DOS Utility: http://www.retroianer.de/SNDOFF.EXE

Here is Code for Linux:
http://www.retroianer.de/sn76489.c
compile with -O2 or -O..

Noise in video is just because i removed MCU for testing purposes.

Don't connect PC-Speaker Input wrong, + is on the edge of the card.

PC-Speaker Mix In does not work on more modern Boards.
Seems they are optimized to drive Piezo Speaker.
(Using 2 Driving Pins..)
For example my Super7 - K6-2 (Commate A7SX).

Love things like this project - well done 😀

there is still some work todo 😀

Thanks!

Dreamblaster also helped me a lot, he send me many parts so i could build prototypes 😀
Maybe in few months you will find the Final Tandy SN76489 Card at the Serdaco Shop and can enjoy a lot of Patched Games and also native ones.
Fratzengeballer from dosreloaded.de forum will also help, patching more Games 😀
And Thanks to pdw for working on the TSR for more modern Computers.

This community is amazing.
If everyone works together we can move mountains.

I finally got around to soldering the two prototype boards you sent me. All went well, except for two things:

1. I can't flash the attiny13. Verification step always fails. Using an usbasp clone with avrdude. Any ideas here what to do? Got the pullup between reset and Vcc, but it doesn't help.

2. The BOM said 47uF on C8. However the LM386 datasheet says there should be a 0.05uF there, so rather 47nF...?

Hope to get some answers. Can't wait to try out the card!

root42 wrote:

I finally got around to soldering the two prototype boards you sent me. All went well, except for two things: […]
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I finally got around to soldering the two prototype boards you sent me. All went well, except for two things:

1. I can't flash the attiny13. Verification step always fails. Using an usbasp clone with avrdude. Any ideas here what to do? Got the pullup between reset and Vcc, but it doesn't help.

2. The BOM said 47uF on C8. However the LM386 datasheet says there should be a 0.05uF there, so rather 47nF...?

Hope to get some answers. Can't wait to try out the card!

9724A320-4393-4C2C-BB9B-1C1AE92BBE43.jpeg

0B798009-57B9-4612-B3D1-5C0E68A7F504.jpeg

Hi,

this is right, C8 is 47nf yes. (Errata in BOM)

It seems you have ATTIny13A choose the right MCU 😀 Tiny13 and Tiny13A differs.

matze79 wrote:

this is right, C8 is 47nf yes. (Errata in BOM)

It seems you have ATTIny13A choose the right MCU 😀 Tiny13 and Tiny13A differs.

Ok, will find some 47nF ones.

Concerning the ATTINY: I have this one:

https://www.mouser.de/ProductDetail/Mic ... KtbA%3d%3d

Doesn't look like the A variant...? I will try avrdude with 13A anyway.

can you post the output of avrdude ?
Kannst du die Ausgabe von avrdude posten ?

Sure thing. Here it is:

1✘-1 ~/Desktop/TandySound
220:20 $ avrdude -c usbasp-clone -p t13
3
4avrdude: warning: cannot set sck period. please check for usbasp firmware update.
5avrdude: AVR device initialized and ready to accept instructions
6
7Reading | ################################################## | 100% 0.00s
8
9avrdude: Device signature = 0x1e9007 (probably t13)
10
11avrdude: safemode: Fuses OK (E:FF, H:FF, L:6A)
12
13avrdude done.  Thank you.
14
15✔ ~/Desktop/TandySound 
1620:20 $ avrdude -c usbasp-clone -p t13 -B 60 -U flash:w:tiny13.hex
17
18avrdude: set SCK frequency to 16000 Hz
19avrdude: warning: cannot set sck period. please check for usbasp firmware update.
20avrdude: AVR device initialized and ready to accept instructions
21
22Reading | ################################################## | 100% 0.00s
23
24avrdude: Device signature = 0x1e9007 (probably t13)
25avrdude: NOTE: "flash" memory has been specified, an erase cycle will be performed
26         To disable this feature, specify the -D option.
27avrdude: erasing chip
28avrdude: set SCK frequency to 16000 Hz
29avrdude: warning: cannot set sck period. please check for usbasp firmware update.
30avrdude: reading input file "tiny13.hex"
31avrdude: input file tiny13.hex auto detected as Intel Hex
32avrdude: writing flash (196 bytes):
33
34Writing | ################################################## | 100% 0.12s
35
36avrdude: 196 bytes of flash written
37avrdude: verifying flash memory against tiny13.hex:
38avrdude: load data flash data from input file tiny13.hex:
39avrdude: input file tiny13.hex auto detected as Intel Hex
40avrdude: input file tiny13.hex contains 196 bytes
41avrdude: reading on-chip flash data:
42
43Reading | ################################################## | 100% 0.07s
44
45avrdude: verifying ...
46avrdude: verification error, first mismatch at byte 0x0000
47         0x00 != 0x09
48avrdude: verification error; content mismatch
49
50avrdude: safemode: lfuse changed! Was 6a, and is now 0
51Would you like this fuse to be changed back? [y/n] 
52avrdude: safemode: hfuse changed! Was ff, and is now 0
53Would you like this fuse to be changed back? [y/n] 
54avrdude: safemode: Fuses OK (E:FF, H:FF, L:6A)
55
56avrdude done.  Thank you.

Also see the picture below for my setup.

What if you simply use usbasp as programmer not -clone ?

i have seen this message before, but only with defective tiny's or bad/loose wiring.

It was the -D parameter... The erase cycle did not seem to be necessary or did not work. After specifying -D the verification succeeded. I will buy two 47nF tomorrow and finish the boards. Then I can try them out...

What do I need softwarewise? Can I simply fire up Zak McKracken or Maniac Mansion and it will detect the card?