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Re: PicoGUS: ISA sound card emulator with Raspberry Pi Pico (Gravis Ultrasound, AdLib, MPU-401, Tandy, CMS)

Posted on 2024-02-29, 08:20

in Marvin \ Sound

in Marvin \ Sound

appiah4 wrote on 2024-02-28, 19:31: It could be a PnP error or reserve conflict. Try to reserve in BIOS the IRQ and DMA you jumpered your card at. I reserved irq 7 but cannot reserve DMA on my bios and also it's a no go. I also removed all the cards in all slot and left only the video card.

Re: PicoGUS: ISA sound card emulator with Raspberry Pi Pico (Gravis Ultrasound, AdLib, MPU-401, Tandy, CMS)

Posted on 2024-02-29, 08:18

in Marvin \ Sound

in Marvin \ Sound

digistorm wrote on 2024-02-28, 21:04: Is it a DX/50 and not a DX2/50? With a 50 MHz bus, ¼ might still be too fast (12.5 MHz). You might try a divider of ⅕, the latest firmware has been tested with 10 MHz ISA bus speed. Yes it's a Dx50. I lowered the bus speed to about 8 Mhz and nothing the same …

Re: PicoGUS: ISA sound card emulator with Raspberry Pi Pico (Gravis Ultrasound, AdLib, MPU-401, Tandy, CMS)

Posted on 2024-02-28, 18:13

in Marvin \ Sound

in Marvin \ Sound

Hello everyone, OK I soldered two guspico 1.2. One for me and the other for my friend. My bad on one board I forgot to check the pico before soldering and unfortunately it's DOA. However on the other board I have a strange behavior. When starting a 486DX50 on a Shuttle Hot 3.0 motherboard with UMC …

Re: Roland SC88VL problem

Posted on 2019-12-19, 17:42

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi, Thanks a lot. The strangest thing is that yesterday I dumped my PROM on my programmer. So I don't really know what's the problem. Maybe the PROM is defective, in the way that to get functional it strains an amperage that the Roland can't provide and my programmer with an external PSU can. Anyway …

Re: Roland SC88VL problem

Posted on 2019-12-18, 20:28

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Anyone have a binary dump of this prom?

Re: Roland SC88VL problem

Posted on 2019-12-18, 18:29

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Ok guys it's most probably the prom. When probing the DIP socket on VCC and VSS it's steady 5.02Volts. When PROM is inserted only 1.92V . So the question is how to get a replacement I don't think that even Roland still have those on stock.

Re: Roland SC88VL problem

Posted on 2019-12-18, 14:31

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Also I checked the DIP socket pinout. A 5.02V current on pin 40 is delivered.

Re: Roland SC88VL problem

Posted on 2019-12-18, 11:38

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi, I already tested if there is any output from the module. No output, so it's probably something different than the LCD circuitry.

Re: Roland SC88VL problem

Posted on 2019-12-18, 08:47

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

OK as I have a programmer I can try to read the prom. What can be a replacement for the HN62448P, the 27C4096? PS. However on the hitachi datasheet the HN62448P is a 42 pin device but here on the the Roland PROM marked HN62444BP there's 40 pins though... PS. OK I made a mistack it's HN62444BP 40 pin …

Re: Roland SC88VL problem

Posted on 2019-12-17, 10:17

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

On the VL it's an external PSU. My SC-55 MkII is working fine on the same PSU.

Roland SC88VL problem

Posted on 2019-12-17, 09:49

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi everyone. I have a problem with my Roland SC88 VL. The device stopped working. I used it 2 months ago, plugged it yesterday and the lcd panel is somehow working (see attachment). However the device is not starting. I changed the battery, no changes. No visible leakage on the PCB. Anyone have any …

FIC PIO2 Vore logic

Posted on 2014-04-16, 20:36

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi everyone, OK I have the FIC PIO-2 Mobo. When I visited the FIC BIOS page there's two different bioses to download for this motherboard one for NS 332 core logic and one for NS 311/312 core logic. I looked on all the chipset but I unfortunately cannot determine what kind of logic my mobo have. Any …

Re: ELTORITO, FreeDOS and Jemmex

Posted on 2014-01-27, 21:38

in DOS

in DOS

OK it's the JEMMEX driver and all EMM386 drivers. I have to check it on a MS-DOS 6.22 or 7.1 and old EMM386 drivers....

ELTORITO, FreeDOS and Jemmex

Posted on 2014-01-25, 17:03

in DOS

in DOS

Hi everybody :) So I'm asking one more time for help. I had a working configuration of FreeDOS with with grub4dos and eltotito driver as an emulated drive option at boot and it worked fine untill.....I formated the drive by mistake and the only backup I had of the FreeDOS installation was the one …

Re: Can I set up DOSBox to print?

Posted on 2013-09-21, 05:55

in DOSBox General

in DOSBox General

Hi, If I can advice you try to use a Virtual machine program like VMWare or Oracle VirtualBox both have free versions. Install DOS on it and try to print using Generic drivers on DOS.

Re: YAMAHA SW60XG

Posted on 2013-09-18, 20:52

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi Keropi, Ok I made a wave file of the efcon /test command (yamaha sw60xg setup/config program) I will send it to you to your mail if you give me your address. You will clearly see the weak input from one channel). I will try to make some other test. Tested also on my old tape recorder with a vu …

Re: YAMAHA SW60XG

Posted on 2013-09-18, 05:40

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi bristlehog and Keropi (you, also here :D), I connected the device to headphones and to a stereo amplifier the same results (directly to the board as well as through SB AWE64). I tried a few games including DOOM I & II, Monkey Island I & II. Yesterday I installed the card on windows 95, I will …

YAMAHA SW60XG

Posted on 2013-09-17, 10:05

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hello everyone, So, I acquired above cited midi card. I would need some advices if possible. I'm using this card as for now in DOS and I figured out that the left channel is weaker that the right one. Is it normal or something is wrong the the board? My second question is how to send Sysex commands …

Re: Another semi-unknown 486 board

Posted on 2013-04-28, 19:12

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi everyone, I know that this post is quiet old but does anyone have the above cited (02/28/96-SiS-496-497/A/B-2A4IBR22C-00) image BIOS file? Thank in advance

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