VOGONS

Search

Common searches

Search results

Display options

Display options

Re: Equivalent of a GeForce2 GTS?

Posted on 2018-04-15, 12:41

To the OP: look for a Quadro2 Pro also. It's the workstation equivalent of the GF2GTS. I have one and it performs indistinguishably from the true GTS. One tip for searching on sites like ebay, etc: often you will see cards listed only as "video card" or "nvidia card" without specifying the model - …

Re: YMF744, DOS, no DMA? (PC/PCI, SB-link tests)

Posted on 2018-02-21, 05:18

I exchanged the ICH and ICH0 LPC Interface PCI ID's with the ones for ICH2 and ICH2-M, can you give it a try on your i850 motherboard stamasd? I used the driver from: http://www.yamaha.co.jp/english/product/lsi/download/ Just a quick update for those who look for the package above, the URL has …

Re: HardMPU, anyone?

Posted on 2017-02-05, 15:18

From that picture I see that the narrowest pulses are about 1/3 of the 100us division, which is consistent with the midi rate of 31250 bit/s. Unfortunately my oscilloscope can't capture screens like that. I could try to determine if I've got the correct rate if I found something that can generate a …

Re: HardMPU, anyone?

Posted on 2017-02-02, 14:04

^ dead ATMEGA? could be! Settings are OK with the same values so that's not the problem 101% Unlikely, I used 2 separate chips bought from 2 distinct sources. Also like I said, when a game with MT32 support is running I can see a signal on the card's output pin. I cannot determine the conformity of …

Re: HardMPU, anyone?

Posted on 2017-02-02, 01:09

Bad news again. That's not the problem. The CKDIV8 was disabled in the 1284 I was using. Just to eliminate any doubt, I played with the fuses until I had the exact same configuration as yours. Then I burned 2 chips with the firmware and these fuses. Tested both of them in the board. No MIDI data …

Re: HardMPU, anyone?

Posted on 2017-02-02, 00:27

Yeah, pin 1. I was tired when I wrote that and didn't have the energy to check. Gotcha. Just wanted to double-check in case that might be the issue. I don't know how your programmer manages the fuse bits, but make sure CKDIV8 is disabled. That will make it appear to work but the MIDI baud rate will …

Re: HardMPU, anyone?

Posted on 2017-02-01, 22:49

ab0tj wrote: stamasd wrote: Well the surrogate Vcc that is pin 2 anyway. 😀 Pin 2 should be GND... 1 is the "VCC through a resistor" pin Yeah, pin 1. I was tired when I wrote that and didn't have the energy to check.

Re: HardMPU, anyone?

Posted on 2017-02-01, 00:48

Can't really tell what the baud rate is by looking at the scope. It's an old, old Hitachi analog scope from the 1970s or so, can't freeze the signal or do any fancy visualizations with it. With an irregular signal, all I see is 2 voltage level lines connected by edges here and there. :) When I said …

Re: HardMPU, anyone?

Posted on 2017-01-30, 01:32

And it's confirmed. The signal from output pin 6 when fed directly into the MT32 via a custom cable isn't considered a valid MIDI stream by the synth, as it doesn't react at all. Even though it does seem to contain bits of data when viewed on the oscilloscope.

Re: HardMPU, anyone?

Posted on 2017-01-29, 19:43

A bit busy with the family now, but when I get the chance (probably later tonight) I will put together a quick-n-dirty output adapter for the _actual_ pinout on the card, as opposed to one deducted from the schematic. That should put to rest any doubts about connectivity. Need to find my stash of …

Re: HardMPU, anyone?

Posted on 2017-01-29, 15:56

Here's what I got so far. I first checked the oscillator to make sure it's working. The oscilloscope shows a beautiful 20MHz sine wave. Then I went directly to checking the output - pin6 on the output connector. And guess what, I see a stream of bits flowing out when a game is running. So the card …

Page 28 of 85

Go to top of page Go to top of page
Close window
Close window