Re: YMF262 no sound from Op3/Op4 in 4-OP mode
Posted on 2020-05-05, 15:22
Congrats, it is nice to hear things work now ~
Re: YMF262 no sound from Op3/Op4 in 4-OP mode
Posted on 2020-05-05, 00:46
That look correct, so I'm sort of out of ideas. Only thing i can think of making a difference is needing to set the LR bits of all the channels not just the 4op channels you use, but channels which ops in 2op more are using the ops that 4op channels are using. The last tidbit is interesting, maybe …
Re: YMF262 no sound from Op3/Op4 in 4-OP mode
Posted on 2020-05-04, 16:54
Are you using correct ops as 3 and 4 for a particular channel ? They are +8 registers away from op1 and 2 of a channel. 3x 4op channels in one set, 3x 4op channels in the second set, with 2 op channels 456 being ops3/4 for 4op channels 123, if that makes sense.
Re: Best port adresses for new Sound Devices
Posted on 2020-05-04, 16:37
Lot of old cards etc. use 10bit address decode which means that mirroring makes most of the top range polluted and you don't really have much free space to use... Effectively you can mostly use holes in 200....3FF range, there should be decent amount of range to use still, especially in a games …
Re: Sound Effects in DN3D playing in Mono when using Labway A151-A00
Posted on 2020-04-30, 12:13
YMF71x cards actually can go up to around 500KHz in SB mode. The cards shouldn't have any issue with stereo sound in Duke3D, except when you use WDM drivers in Windows, in which case DOS support is borderline broken. Use the VXD drivers provided by Yamaha if you also plan to use the card in Windows. …
Re: Ps2 card
Posted on 2020-04-30, 00:37
Someone here made an ISA board that presents a PS/2 card as a COM port to the PC which could be used. Another PS/2 Mouse ISA (ISA8) card adapter
Re: Question to OSSC owners (and other scaler owners) regarding x-modes/y-modes (non standard VGA modes)
Posted on 2020-04-28, 22:27
You probably can get new CFL tubes but replacing them is a huge PITA, the panels aren't really made for disassembly once they have been put back together. And you need to get several excess tubes as they break really easily and you'll probably break one while fighting the panel 🤣.
Re: What retro activity did you get up to today?
Posted on 2020-04-28, 21:37
I messed around with my AGP Radeon X850XT PE I used years ago in my main machine. I replaced thermal paste, greased up the bearings in the fan and did some testings and it works nicely although it is still really loud... I did a test with 3Dmark2000 and two CPUs using that card, in default benchmark …
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
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.
Re: Why do 286 motherboards usually have two BIOS chips?
Posted on 2020-04-28, 17:26
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 …
Re: What is your favorite version of Nusb?
Posted on 2020-04-28, 11:07
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 🤣.
Re: Gamepad "not detected"
Posted on 2020-04-27, 20:25
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 …
Re: Bought these (retro) hardware today
Posted on 2020-04-27, 12:09
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 …
Re: DRAM advice for Gravis Ultrasound
Posted on 2020-04-26, 15:43
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, …
Re: Newly made Gravis Ultrasound compatible cards ... what's the degree of interest?
Posted on 2020-04-26, 14:27
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 …
Re: ISA slot motherboards from AliExpress
Posted on 2020-04-26, 12:20
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. …
Re: ISA slot motherboards from AliExpress
Posted on 2020-04-26, 11:41
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 …
Re: ISA slot motherboards from AliExpress
Posted on 2020-04-25, 19:43
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.
Re: ISA slot motherboards from AliExpress
Posted on 2020-04-25, 19:23
This board has a PCI to ISA bridge and these require chipset support to do DMA, and that support ends with ICH5 south bridge.
Re: Request for EEPROM dump from Audiotrix 3D/XG (card seems partially broken)
Posted on 2020-04-25, 08:14
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 ~
Page 84 of 152