Re: Question to OSSC owners (and other scaler owners) regarding x-modes/y-modes (non standard VGA modes)

Posted on 2020-04-28, 18:33

by

by Tiido

in Marvin \ Video

in Marvin \ Video

There is a good chance the panels use same connector, and when they do (and share resolution) the Dell panel will work fine with Samsung electronics, though you may transplant an EEPROM chip from one panel to the other as often is needed with laptop panels.

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Re: Why do 286 motherboards usually have two BIOS chips?

Posted on 2020-04-28, 17:26

by

by Tiido

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Early chipsets didn't try to support single 8bit ROM and/or shadowing. When shadowing isn't possible and you care about performance you use two chips to fill the entire bus for increased performance rather than splitting up bus cycles into several smaller ones. With shadowing, access to ROM area …

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Re: What is your favorite version of Nusb?

Posted on 2020-04-28, 11:07

by

by Tiido

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I use NUSB 3.6 and haven't had any issues either. In past I used 3.3 but because later ones didn't exist then 🤣.

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Re: Gamepad "not detected"

Posted on 2020-04-27, 20:25

by

by Tiido

in Marvin \ Sound

in Marvin \ Sound

Gameport works by counting CPU cycles to measure how long a timer circuit takes to change state (proportionally to joystick position) and that method pretty much breaks down on fast hardware. I'm not sure what is considered too fast though. It is the only thing i can think of that can get in the way …

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Re: Bought these (retro) hardware today

Posted on 2020-04-27, 12:09

by

by Tiido

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Salient wrote on 2020-04-26, 13:16: I doubt I can do anything with it related to DOS gaming though. Or would it be MT-32 compatible with a few tricks? Sample ROMs are completely different and there's few other differences so it will unfortunately never be MT32 compatible even though it uses exact …

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Re: DRAM advice for Gravis Ultrasound

Posted on 2020-04-26, 15:43

by

by Tiido

in Marvin \ Sound

in Marvin \ Sound

Any 80ns or faster 256x16 SOJ40 chips as seen on various old video cards will work, there's no preferred chips or characteristics, you can use whatever you can find. Here are some part numbers that would work : NN5147265J, TMS454160DZ, HY514260B, TC514260BJ, HYB514175BJ, MN414260SJ, HM514260AJ, …

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Re: Newly made Gravis Ultrasound compatible cards ... what's the degree of interest?

Posted on 2020-04-26, 14:27

by

by Tiido

in Marvin \ Sound

in Marvin \ Sound

I just use drag method with decent amount of flux between pins and a ball of solder on the tip when hand soldering a QFP and once I'm all done I use wick to get rid of the few solder bridges at the end. Dried up flux residue I scrape away and then use qtip soaked in acetone or some cleaning alcohol …

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Re: ISA slot motherboards from AliExpress

Posted on 2020-04-26, 12:20

by

by Tiido

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I used to have a board named BCM875PLG that used the same Winbond bridge chips and it is still a PCI to ISA type, and does require PC/PCI support signals for DMA to work. W83629D deals with the DMA and IRQ signals, essentially turning a PC/PCI header signals into full set of ISA control signals. …

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Re: ISA slot motherboards from AliExpress

Posted on 2020-04-26, 11:41

by

by Tiido

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

also @Tiido, what I've been reading from other threads and sites you got it working on a board with G41 and ICH7? My board, RUBY9719VG2AR, has LPC to ISA bridge on it rather than PCI to ISA, and it is the only reason things could work, except that only limited amount of IO ranges are possible to be …

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Re: ISA slot motherboards from AliExpress

Posted on 2020-04-25, 19:43

by

by Tiido

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I wouldn't know why the BIOS has these things but a PCI based bridge requires two signals in particular for DMA to work, which are deleted on chipsets after ICH5. The same signals are also present on PC/PCI aka SBlink connector.

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Re: ISA slot motherboards from AliExpress

Posted on 2020-04-25, 19:23

by

by Tiido

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

This board has a PCI to ISA bridge and these require chipset support to do DMA, and that support ends with ICH5 south bridge.

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Re: Request for EEPROM dump from Audiotrix 3D/XG (card seems partially broken)

Posted on 2020-04-25, 08:14

by

by Tiido

in Marvin \ Sound

in Marvin \ Sound

The datasheet I followed doesn't mention that they are reset with the GM and GS resets. It certainly survived all sort of MIDI files I tried so I think the setting will stick. EDIT: Thänk you very much ~

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Re: Request for EEPROM dump from Audiotrix 3D/XG (card seems partially broken)

Posted on 2020-04-25, 07:32

by

by Tiido

in Marvin \ Sound

in Marvin \ Sound

All difference on the 3D/XG card is in analog domain, but as I don't have that card I cannot really say more than that. EEPROM etc. will not have any effect on that aspect Normally the clipping isn't a problem since in stock config YMF71x line out goes to line in of a WB card and the output of it …

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Re: Roland SCB-55 in 2020 - fair price and how to find one?

Posted on 2020-04-24, 09:21

by

by Tiido

in Marvin \ Sound

in Marvin \ Sound

AudiTrix has a circuit around output and line input to route it through a DB60XG board. I don't know the exact circuit but if it isn't configured right you would get some additional strangeness even when DB60XG board isn't attached.

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Re: Request for EEPROM dump from Audiotrix 3D/XG (card seems partially broken)

Posted on 2020-04-24, 09:07

by

by Tiido

in Marvin \ Sound

in Marvin \ Sound

Monster MIDI board is indeed very loud and the line in can only take up to 5Vpp (and some boards like DB60XG have 8Vpp output that clips any existing sound card out there). 0db point on input mixer is at the very bottom and on playback mixer at first notch on most inputs as seen here : OptimalMixer. …

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Re: Roland SCB-55 in 2020 - fair price and how to find one?

Posted on 2020-04-23, 21:04

by

by Tiido

in Marvin \ Sound

in Marvin \ Sound

Here's a recording from a Roland : FLAC : http://www.tmeeco.eu/BitShit/WaterWorld.flac OGG : http://www.tmeeco.eu/BitShit/WaterWorld.ogg I suppose you mean the low cymbal sound ?

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Re: Roland SCB-55 in 2020 - fair price and how to find one?

Posted on 2020-04-23, 19:48

by

by Tiido

in Marvin \ Sound

in Marvin \ Sound

From what I know, SC88 in SC55 mode isn't completely authentic. I have access to SCB55 and couple Dream based cards (SAM9233 with 1 and 4MB bank and SAM9733 with 4MB GS bank) and they are close enough that if you aren't intimately familiar with them all you aren't gonna tell the difference. …

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Re: [SOLVED]Audiotrix 3D/XG low volume and hum

Posted on 2020-04-23, 18:11

by

by Tiido

in Marvin \ Sound

in Marvin \ Sound

They are found here : http://www.tmeeco.eu/TKAYBSC/SETYMF/ READPNP reads the PnP EEPROM content into EEPROM.BIN file and WRITEPNP writes it to the card.

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Re: [SOLVED]Audiotrix 3D/XG low volume and hum

Posted on 2020-04-23, 17:54

by

by Tiido

in Marvin \ Sound

in Marvin \ Sound

The 300 not sticking is a program bug that I will investigate. It probably originates from hidden YMF704/721 specific settings that are visible of my own made cards. /SETPNPID will only change the ANSI ID string but not the actual PnP ID (YMH0021 etc). You make a file named "NEWPNPID.TXT" and any …

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Re: T-04YBSC-A, new YMF71x based sound card + SETYMF utility

Posted on 2020-04-23, 10:35

by

by Tiido

in Marvin \ Sound

in Marvin \ Sound

SETYMF sends a GM reset to connected MIDI devices as part of initialisation, which should silence any hanging notes and put the MIDI device into a default state. Thänk you very much, it is appreciated a lot ~ ---- There's no significant news around my projects. Work things to raise money are taking …

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