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Re: HardMPU, anyone?

I think at the time of that reply I did not realize the chip was split in half with two different OE's, as I have learned a little bit more since and that part is pretty obvious now when I look at it. I'm not sure I follow... The reset and interrupt should happen independently of any reads or writes …

Re: Newly made PCMCIA sound card

I am still poking away at this when I can find time. I have played with the IBM 3D Sound a bit, I much prefer the sound out of an actual yamaha chip and the dreamfr midi chip, even the vlsi i prefer over the ibm 3d sound. some additional learning curve for me, as I ended up moving from the simple …

Re: Newly made PCMCIA sound card

I plan to ask Digger more questions about this, how to play audio to these other chipsets as I saw some other work he is doing on dos playback to newer chip. My thought though is, say I could make a pcmcia card that is very basic almost no components, i.e. we are talking i dont know $20 dollar range …

Re: Newly made PCMCIA sound card

re: pcb1 - Yes I am working on the DSP, OPL & MPU-401 + DREAM.FR midi chip, and Gameport. What I have yet to determine is how to mix the audio outputs together and if I should be trying to implement a software controllable mixer or not (i mean mixer hardware that can be controlled from software) re: …

Re: Newly made PCMCIA sound card

yes, somehow I have stumbled around in the dark long enough to arrive at something that almost works correctly. Your pointers and information along the way have been helpful would not have got even this working otherwise. Duke3D pushes the system itself a bit hard, and also all of my serial debug …

Re: Newly made PCMCIA sound card

The changes to how I am hooking interrupts helped solve my issue with protected mode games, which has now exposed the flaw in how I am filling my FIFO. I know what to do next though. I will try to think of a name for this and start a new thread soon. https://www.youtube.com/watch?v=PGi83TjvMF0 edit: …

Re: Newly made PCMCIA sound card

When you configure your game for the IBM 3D PCMCIA card, i.e IO/IRQ/DMA for 220/7/1, I am just wondering if you look at the actual IRQ that is allocated to the card, is it 7? or is it something else. I am having a little bit a of a battle between my TSR and the game and control being passed back and …

Re: Newly made PCMCIA sound card

Not sure where I am going to find help on this. My program sets up an ISR on 0x1C timer that watches the interrupt vector table for any changes to the SoundBlaster IRQ. If it detects a change, it changes it again pointing to my own ISR, and I make an I/O write to the pcmcia card to set a register …

Re: Newly made PCMCIA sound card

There is also the Snark Barker project https://github.com/schlae/snark-barker Here is more or less complete list of all sound card replica projects https://www.vogons.org/viewtopic.php?t=68265 I use the firmware SnarkBarker project recovered from a real DSP, and I run it unmodified on the AT89S51. …

Re: Newly made PCMCIA sound card

So I had got this working as a proof of concept some time ago, but I have failed to get reliable operation. Initially I thought it was my breadboard nest.... I have recreated the circuit multiple times. A lot of the symptoms felt like floating pins, i.e. would be in dma playback no issue then I …

Re: Newly made PCMCIA sound card

Same theres no reason to stop that project but the two do not necessarily need to be the same. theres been products around made by Magma that are pcmcia to PC I am no engineers but Id think just a simple PCMCIA card to 2 port external PCMCIA would be even simpler than pcmcia to PCI. I purchased one …

Re: Newly made PCMCIA sound card

I am working on a couple things and there is overlap. I had intended to utilize this thread for discussion about the PCMCIA sound card per the title and have a few times tried to steer away from talking about the HP specific aspects as that does not have a wider interest here. The "audio" portion …

Re: Newly made PCMCIA sound card

I am working on a couple things and there is overlap. I had intended to utilize this thread for discussion about the PCMCIA sound card per the title and have a few times tried to steer away from talking about the HP specific aspects as that does not have a wider interest here. The "audio" portion of …

Re: Newly made PCMCIA sound card

I made a breakout/dev board for the PCMCIA port, it has a flash chip and GAL to handle some of the basic logic needed and then has some ports for my logic analyzer, and a header that I can use to connect to the breadboard for testing different functions. I have a couple other pcmcia projects I am …

Re: Newly made PCMCIA sound card

I like this frankenstein setup! Are you still sure you can fit all this on a pcmcia pcb? Did you try any real games? warcraft2 "your soundcard works perfectly" was one of my tests, doom and streamtracker. ST3 I was not getting the expected sound, I think there is still an error in how I calculate …

Re: Newly made PCMCIA sound card

i had a couple hours to play with this over the weekend. okay this is a very crude proof of concept but it works in principal, and does not matter what mode the game is in. I am now at a point I am going to take it all apart and try to re-do it neater and trouble shoot some timing issues. every now …

Re: Newly made PCMCIA sound card

I guess when I hear the word emulate in relation to soundcards, I assume we are talking about i/o trapping as step1, which does not work with many games so it fails there. the ibm method involves no i/o port trapping, the application is doing i/o transfers to the real hardware like normal, the isr …

Re: Newly made PCMCIA sound card

This pcmcia card has specific hardware onboard that works in concert with the TSR to carry out the DMA transfer transparently to the application and the soundblaster dsp. There is not actually any emulation taking place, in that sense, there are no modifications to the game/application and there …

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