Re: BlasterBoard 2.0 : A modern SB 2.0-compatible ISA sound card

Posted on 2018-09-25, 08:22

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by LABS

in Marvin \ Sound

in Marvin \ Sound

Looks awesome! Definitely interested in a PCB. Can you make it compatible with the Keystone ISA bracket? (https://www.digikey.de/product-detail/de/keystone-electronics/9202/36-9202-ND/608463) That bracket is still in production and one can easily drill holes for audio ports or potentiometers. A …

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Re: BlasterBoard 2.0 : A modern SB 2.0-compatible ISA sound card

Posted on 2018-09-24, 22:47

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by LABS

in Marvin \ Sound

in Marvin \ Sound

Hi there, I finally finished the prototype! Now it has completely new mixer, output filter and noiseless power supply (breadboard on the left). P1010599.JPG The card has 4 sound sources: 1) An 8-bit mono sample playback channel, which is fully compatible with SB 2.0 API, ThunderBoard API and has …

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Re: Sound Blaster 2.0 project & IRQ from OPL2

Posted on 2018-09-24, 16:33

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by LABS

in Marvin \ Sound

in Marvin \ Sound

keropi wrote: great news! does it also support ADPCM for the odd game like Duke Nukem 2? Sure it does!) I will make an open firmware. ATmega is running on 20MHz, so there are resources available for experiments and custom stuff.

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Re: Sound Blaster 2.0 project & IRQ from OPL2

Posted on 2018-09-24, 16:12

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by LABS

in Marvin \ Sound

in Marvin \ Sound

Very nice. When can we order it? :) It will be available in 2-3 weeks. Hi! Very cool project! What does it sound like compared to the old SB2? Does the modern op-amps give less noise? The noise issue was the challenge of the last month and it was not the old opamp's problem in SBs, but PC power …

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Re: Sound Blaster 2.0 project & IRQ from OPL2

Posted on 2018-08-20, 23:34

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by LABS

in Marvin \ Sound

in Marvin \ Sound

Most games only output sound at 11025kHz, which would require only half the bandwidth you describe, which would be feasible over an LPT port, possibly even on a 386 machine, even when combined with something like OPL2/OPL3 on the same port, perhaps through some kind of latching mechanism in the …

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Re: FMonster, the monster of sound synth

Posted on 2018-08-20, 23:13

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by LABS

in Marvin \ Sound

in Marvin \ Sound

I don't get why I should use two ICs (and introduce new one into the BOM - 4075) for 12-bit decoding, when I already have 14-bit decoding with just one 74HC138? It is one IC for the whole board and all blocks have their own address decoders, different from each other. :confused: When I guess I …

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Re: FMonster, the monster of sound synth

Posted on 2018-08-19, 21:20

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by LABS

in Marvin \ Sound

in Marvin \ Sound

Using YM3812 in SOP24 might save some more space f_4981741e042d4aa2b6261d9b6ccefcce.jpg EDIT: For decoding 12-bit address for space saving you can use only 2 ICs - one 74x138 and one 74x4075 (triple 3-input OR): Route all constant 0s to 2 of 4075's ORs (A1, A2, A4, A6, A10, A11), output them to 3rd …

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Re: DOSBox debugger

Posted on 2018-07-25, 21:43

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by LABS

in DOSBox Development

in DOSBox Development

Is there a way to dump code overview to a file?

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Re: Audio mixer recommendations

Posted on 2018-07-21, 13:57

by

by LABS

in Marvin \ Sound

in Marvin \ Sound

You probably need a line mixer like https://www.sweetwater.com/store/detail/LX308 … 308b-line-mixer or http://tascam.com/product/lm-8st/ Cheaper: https://www.sweetwater.com/store/detail/Multi … ereo-line-mixer

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Re: BlasterBoard 2.0 : A modern SB 2.0-compatible ISA sound card

Posted on 2018-07-20, 22:29

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by LABS

in Marvin \ Sound

in Marvin \ Sound

Would it be hard to implement a digital out? Maybe just as a header on the board? I know it's not really necessary for the kind of tech we are dealing with but I'm still interested in how much audio quality one can get out of such a chip using a big homping hifi amp :) The OPL has digital output …

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Re: Tandy - SN76489 Soundcard Project - (mostly finished)

Posted on 2018-07-20, 22:06

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by LABS

in Marvin \ Sound

in Marvin \ Sound

Neat work!

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Re: BlasterBoard 2.0 : A modern SB 2.0-compatible ISA sound card

Posted on 2018-07-20, 16:06

by

by LABS

in Marvin \ Sound

in Marvin \ Sound

Just installed Windows 98 and on the first startup heard a "Start Windows" sound))) What a bliss!))) Should I rename it to a "Bliss Board 2.0"? )) Did not expect that actually) Windows autodetected it during setup as a Sound Blaster or compatible 😎 So it is officially SB-compatible now 😊

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Re: Recommend me a reasonably priced sound card for my 386

Posted on 2018-07-18, 11:28

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by LABS

in Marvin \ Sound

in Marvin \ Sound

80386 has 16-bit slots. BlasterBoard 2.0 is very actual when 16-bit slots are absent and it's awesome! But there are a lot of excellent SB-clones. Explain please why we may choose BlasterBoard 2.0 for 386+ machines and don't choose one of billion good come-at-able cheap clones. Thank you! …

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Re: BlasterBoard 2.0 : A modern SB 2.0-compatible ISA sound card

Posted on 2018-07-18, 11:16

by

by LABS

in Marvin \ Sound

in Marvin \ Sound

i also would like to get a board :) Thank you! Looks like a fun project. My NEC V30 based computer could use sound blaster. So count me in ... either as a kit or premade. You got it too. Very nice work! I take it a SB Pro 2 version would not be too far off, now that you've gotten this far. You'd …

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Re: MPU-401, General MIDI and WaveBlaster programming

Posted on 2018-07-17, 22:27

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by LABS

in Marvin \ Sound

in Marvin \ Sound

Doom-engine's DMX sound library has a similar bug. When it writes DMA buf length to Sound Blaster's DSP it should issue command 0x48 followed by 2 bytes of length, but it does not poll status byte before writing 2nd byte and issues it immediately after the 1st, so it is lost if DSP is not ready to …

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Re: BlasterBoard 2.0 : A modern SB 2.0-compatible ISA sound card

Posted on 2018-07-16, 11:21

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by LABS

in Marvin \ Sound

in Marvin \ Sound

Can I reserve a card for myself? Will it only be available as a DIY kit, or as a finished product as well? kinda interested as well - I don't mind to solder my card (prefer it actually) or even anyone else's who cannot solder I am also interested in a card. DIY kit absolutely ok, as long as there …

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Re: BlasterBoard 2.0 : A modern SB 2.0-compatible ISA sound card

Posted on 2018-07-14, 20:07

by

by LABS

in Marvin \ Sound

in Marvin \ Sound

Which games that use ADPCM samples do you know? Thanks

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Re: Recommend me a reasonably priced sound card for my 386

Posted on 2018-07-14, 19:33

by

by LABS

in Marvin \ Sound

in Marvin \ Sound

BlasterBoard 2.0 - a modern 8-bit ISA sound card I'm currently working on will soon be available in limited quantity for purchase. It is SB2.0 and ThunderBoard compatible, modern and expandable via firmware updates and will be reasonably priced. BLASTERBOARD : A new SB 2.0-compatible ISA sound card …

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Re: BlasterBoard 2.0 : A modern SB 2.0-compatible ISA sound card

Posted on 2018-07-14, 19:20

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by LABS

in Marvin \ Sound

in Marvin \ Sound

This is a really great project and has a potential to address one of the fundamental weak points of DOS gaming -- the lack of sound cards without weaknesses. How much of the bus controller and codec functionality is fixed? Could this base design be expanded to interface via SB Pro, WSS, Ensoniq, …

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BLASTERBOARD : A new SB 2.0-compatible ISA sound card

Posted on 2018-07-08, 22:30

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by LABS

in Marvin \ Sound

in Marvin \ Sound

BlasterBoard is an ISA sound card with open source firmware (ATmega328P) and is software-compatible with Creative Sound Blaster 2.0. It can play 8-bit mono PCM/ADPCM samples (up to 62500 Hz), FM music via OPL2 chip and has CD/Line and PC-Speaker inputs. Each sound source has individual volume …

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