VOGONS


First post, by matze79

User metadata
Rank l33t
Rank
l33t

A Building Kit Version of the Tandy Card, featuring only necessary Stuff:

tndy_nano.jpg
Filename
tndy_nano.jpg
File size
212.36 KiB
Views
726 views
File license
CC-BY-4.0
tndy_nano_operating.jpg
Filename
tndy_nano_operating.jpg
File size
134.22 KiB
Views
726 views
File license
CC-BY-4.0

properly one of the smallest Soundcard existing.
I needed a extra low profile Version for a Friend.
Why not make one ?
and here it is!
Only 3.8cm in height with Connector.

Its almost similar to the First Version but with added Fixes.

https://dosreloaded.de - The German Retro DOS PC Community
https://www.retroianer.de - under constructing since ever

Co2 - for a endless Summer

Reply 2 of 39, by ElBrunzy

User metadata
Rank Oldbie
Rank
Oldbie

omg! a true Sega Master System's SN76489 into your computer! I would like to have one since the saa1099 emulation from CM/S is not perfect and we found bug using sbvgm.exe from OplX playing back .vgm into CM/S. I'll try to bring this into Oplx's attention and if he think it would be compatible with sbvgm I would be interested into getting a kit. Maybe I would get two kit and build one for our friend OplX as a gift.

Reply 3 of 39, by matze79

User metadata
Rank l33t
Rank
l33t
parts.jpg
Filename
parts.jpg
File size
188.8 KiB
Views
631 views
File license
CC-BY-4.0
  List of Parts
_______________
[b]< building time >[/b]
---------------
\ ^__^
\ (oo)\_______
(__)\ )\/\
||----w |
|| ||


C1,C2,C3,C10,12 - 100nf 104 Ceramic Capacitor
C4,C5 - 10uf Electrolyt Capacitor
C6 - 68pf Ceramic Capacitor
C7 - 47nf 473 Ceramic Capacitor
C8 - 220uf Electrolyt Capacitor
C9 - 470uf " "
C11 - 470nf 474 Ceramic Capacitor
D1,D2 - Diodes 1N4001 - watch Polarity
IC1 - 74LS74 IC
IC2 - 74HC688 Comparator IC
IC3 - LM386 Amplifer IC
IC5 - ATTINY13 Reset/Muting Circuit MCU
J1 - 3,5mm Headphone Jack
JP2/SPK - 2 Pin Header (Internal Speaker Connection)
JP1 - 3 Pin Header (Jumper Settings)
R1 - 10 Ohm Resistor
R2 - 33 Ohm Resistor
R3 - Variable Trimpot 10k (Volume Setting)
R4,R9 - 1k Resistor
R13 - 2,2k Resistor
R_FIX - 10kOhm Resistor
T1 - NPN Transistor
U$1 - Socket DIP 16
U$1 - SN76489 Soundchip

Errata:
misordered 470uf Capacitor, Size to big, but fits.
PCB Errata - R3 Trimpot Holes bit too small
Bus Noise, fix add 10k Ohm Resistor.
R2 and C12 are switched, R2 should be in C12 and C12 in R2 Position.

vr_fix.jpg
Filename
vr_fix.jpg
File size
126.89 KiB
Views
542 views
File license
CC-BY-4.0

Assembled Card with components in right Position 😉

psg.jpg
Filename
psg.jpg
File size
202.59 KiB
Views
542 views
File license
CC-BY-4.0
Last edited by matze79 on 2020-07-04, 13:33. Edited 3 times in total.

https://dosreloaded.de - The German Retro DOS PC Community
https://www.retroianer.de - under constructing since ever

Co2 - for a endless Summer

Reply 5 of 39, by root42

User metadata
Rank Oldbie
Rank
Oldbie
ElBrunzy wrote on 2020-07-03, 20:25:

What do you mean about bus noise exactly ?

Some whistling and noisy sounds when the PC is doing stuff. Very common on sound cards that get their power for amplification from the ISA bus. Not sure if matze uses a voltage regulator to generate some less noisy voltage. Lots of cards have this issue more or less.
EDIT: saw the voltage regulator! So the noise creeps in somewhere else.

YouTube and Bonus
80386DX@25 MHz, 8 MiB RAM, Tseng ET4000 1 MiB, SnarkBarker & BlasterBoard, PC MIDI Card + SC55 + MT32, XT CF Lite, OSSC

Reply 6 of 39, by matze79

User metadata
Rank l33t
Rank
l33t

There is no Voltage Regulator.
A 10k Resistor on VR will eliminate most of the noise.
You can listen to the Video.
I will try later to record some VGMs.
Any wishes ?

The Amp is powered over 2 Diodes from 12V.
In the SMD Version everything is powered from 7805 it was not enough to just Power the Soundchip.
Also found another Error the Filter was wrong, C12 and R3 are switched in Place.

https://www.youtube.com/watch?v=PVJx0jjLjX0

https://dosreloaded.de - The German Retro DOS PC Community
https://www.retroianer.de - under constructing since ever

Co2 - for a endless Summer

Reply 7 of 39, by matze79

User metadata
Rank l33t
Rank
l33t

Another Video:

https://www.youtube.com/watch?v=EGr8Vi2HBHU

Titles:
Paku Paku
Police Quest II

SBVGM playing some Sega SMS Game Themes:
Alex the Kidd - Main theme
Batman Returns - Main theme

https://dosreloaded.de - The German Retro DOS PC Community
https://www.retroianer.de - under constructing since ever

Co2 - for a endless Summer

Reply 9 of 39, by ElBrunzy

User metadata
Rank Oldbie
Rank
Oldbie
matze79 wrote on 2020-07-04, 07:34:

I will try later to record some VGMs.
Any wishes ?

One of my favorite soundtrack is on the SEGA Master System was Miracle Warrior's ending music. I was doing some testing of oplx's sbvgm.exe and it's one of the benchmark music. It can be quite problematic so I would be very interested to know how it sound on your creation. Since it's one of those YM2413/SN76489 theme sound and the problem is that it declare both chip in the vgm, I'll put both version, use the one that ever work.

Attachments

  • Filename
    mwarrior.zip
    File size
    3.69 KiB
    Downloads
    7 downloads
    File license
    Public domain
Last edited by ElBrunzy on 2020-07-04, 20:56. Edited 1 time in total.

Reply 10 of 39, by ElBrunzy

User metadata
Rank Oldbie
Rank
Oldbie
matze79 wrote on 2020-07-04, 13:05:

SBVGM playing some Sega SMS Game Themes:
Alex the Kidd - Main theme

haha wow it's amazing ! You'r product seem to work allright already !

I hope you did not forgot I wanted one

Reply 11 of 39, by ElBrunzy

User metadata
Rank Oldbie
Rank
Oldbie
tomexplodes wrote on 2020-07-04, 15:45:

Is there any place to get one of these already assembled? I have hand tremors thanks to MS and can't really do soldering.

I see you are in New York, it's quite near where I live, I would be glad to assemble one for you and the ship it your way. I'm already discussing with matz79.

OK... last time I do three message to do three reply ... damn, that project have me so enthusiast!

Reply 12 of 39, by tomexplodes

User metadata
Rank Newbie
Rank
Newbie
ElBrunzy wrote on 2020-07-04, 21:01:
tomexplodes wrote on 2020-07-04, 15:45:

Is there any place to get one of these already assembled? I have hand tremors thanks to MS and can't really do soldering.

I see you are in New York, it's quite near where I live, I would be glad to assemble one for you and the ship it your way. I'm already discussing with matz79.

OK... last time I do three message to do three reply ... damn, that project have me so enthusiast!

Thank you for the offer! I have sent you a PM.

Reply 13 of 39, by matze79

User metadata
Rank l33t
Rank
l33t

i can`t send to USA due to Corona. (USA is very SPECIAL ..)
Sending from Germany costs currently 36,99€ to USA, only Priority Mail avaible.
No small letters possible..

i have only few DHT kits left. if anyone is interested.

https://dosreloaded.de - The German Retro DOS PC Community
https://www.retroianer.de - under constructing since ever

Co2 - for a endless Summer

Reply 14 of 39, by dr.zeissler

User metadata
Rank Oldbie
Rank
Oldbie

I think beside an euro-pc, such a soundcard could be interesting for my A2286 too.
Currently I am using a SC-1630 Formosa with primary ide with cf-card as hard-disk.

Retro-Gamer 😀PowerMac 6100-66/Houdini 486/66 - G4 Cube 450/Rage128pro OS9.0.1 - Macintosh LC/Apple IIe Card OS6.0.8 - Acorn A4000 Archimedes - Unisys CWD 486/66 + Aztech Washington

Reply 15 of 39, by root42

User metadata
Rank Oldbie
Rank
Oldbie
matze79 wrote on 2020-07-06, 08:18:

i can`t send to USA due to Corona. (USA is very SPECIAL ..)
Sending from Germany costs currently 36,99€ to USA, only Priority Mail avaible.
No small letters possible..

Wow, I didn't notice this until now, but indeed: DHL doesn't offer those shipment options for USA anymore. That's insane!

YouTube and Bonus
80386DX@25 MHz, 8 MiB RAM, Tseng ET4000 1 MiB, SnarkBarker & BlasterBoard, PC MIDI Card + SC55 + MT32, XT CF Lite, OSSC

Reply 16 of 39, by matze79

User metadata
Rank l33t
Rank
l33t

Yeah the insane thing about is you can Ship without issues from Czech. But i can`t drive there just to send 2-3 Parcels.

https://dosreloaded.de - The German Retro DOS PC Community
https://www.retroianer.de - under constructing since ever

Co2 - for a endless Summer

Reply 17 of 39, by ElBrunzy

User metadata
Rank Oldbie
Rank
Oldbie

root42: I dont really care about the isa noise sound in that case. My impression is that it wont be a problem if using to play vgm with sbvgm.exe under msdos. Also maybe some sierra games, but I expect it to occur sparingly when you switch screen or stuff like that.

matze79: I was here to say that I wanted to use a socket so I could experiment with SN76489 and SN76489AN, but I'm glad to see you already took care of that. I see you ship the AN version from the picture but you list the non-AN version. I guess your target was Tandy so you went with the AN? For now the only thing I know is that the phase is inverted so it's probably meaningless difference in between those two chip version.
Also, matze79, thanks for the assembly information, I will take care about that.

Reply 19 of 39, by matze79

User metadata
Rank l33t
Rank
l33t
ElBrunzy wrote on 2020-07-11, 05:19:

matze79 a question that just crossed my mind: when did you experimented bus noise ?

Only on "high volume levels."
E.g. on hdd access.

matze79: I was here to say that I wanted to use a socket so I could experiment with SN76489 and SN76489AN, but I'm glad to see you already took care of that. I see you ship the AN version from the picture but you list the non-AN version. I guess your target was Tandy so you went with the AN? For now the only thing I know is that the phase is inverted so it's probably meaningless difference in between those two chip version.
Also, matze79, thanks for the assembly information, I will take care about that.

I don`t hear any difference between the two.
Just used what i was be able to purchase 😀

https://dosreloaded.de - The German Retro DOS PC Community
https://www.retroianer.de - under constructing since ever

Co2 - for a endless Summer