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Support / Re: Can't eject Retrode from PC (Windows 7)
« Last post by ssokolow on 05/Dec/2019 04:24:20 PM »
Whenever I finish using my Retrode I try to eject it (just like any other USB device) using either the USB icon by the Windows clock or by right-clicking the mapped unit and selecting "Eject", however, it fails anyway. "Error ejecting RETRODE (E)" is shown.

Is that normal? I'm making sure the led is not blinking when I pull the cable but it feels unsafe doing that nonetheless, I'm afraid I could corrupt something.

Sorry I took so long to respond to this. I saw your post just as I was preparing for bed and then the open tab got lost under a pile of others before I got to it.

To answer your question, it should be normal. The same thing happens on Linux for me. Try using "Safely Remove" and see if that works differently.

(On Linux, "Safely Remove" is accomplished by "unmounting" a filesystem while "Ejecting" is unmounting and then asking the device to eject the tray/media. The Retrode firmware has a bug in how it announces itself to the OS, so it claims to be ejectable but then returns an error when the OS asks it to eject.)
General Discussion / Re: PC Engine/Turbografx plug in?
« Last post by Retrofan on 27/Nov/2019 02:34:57 PM »
Regarding the Tennokoe Bank's SRAM, Chris Covell mentioned the following on the PC Engine forums:
Here's the Tennokoe Bank SRAM reading method, by the way:

Write #$68 to $0000 in bank $68. Then write 0 to $0000 in bank $78, then write #$73 to $0000 in bank $78 three times.
You can now map in bank $40 into, eg. $8000 and read up to $9FFF.

I hope this helps if there's an intention to make the SRAM readable/writeable with the Retrode with future firmware revisions. To those who don't know, the Tennokoe Bank card acts as a long-term backup method for savegames stored on the CD-ROMĀ² system's and PC Engine Duo's internal SRAM. Since the system's SRAM is short-term capacitor backed and the Tennokoe bank card's SRAM is battery backed, they will only last for a certain time period. It could be handy to transfer savegames from the card to the PC and vice versa.
Support / Re: N64 with SRAM lose save files after disconnecting.
« Last post by skaman on 26/Nov/2019 09:57:20 PM »
N64 save support has been tested by a lot of people.

Lost SRAM save data is usually due to old (weak) batteries. The low battery voltage will cause problems even if the battery isn't completely dead.

Do the problem carts still have the original battery?

If yes, then I'd dump the SRAM as soon as possible before the data is gone.  Replace the battery and write the save file back to the cart.

General Discussion / Re: PC Engine/Turbografx plug in?
« Last post by Retrofan on 26/Nov/2019 08:18:14 PM »
I did the upgrade to Retrode firmware v0.26a beta today, and guess what: It werkz!

The Retrode also recognizes the Low Cost Flash HuCard by

I also tried the Tennokoe Bank card. The ROM can be dumped, though there's no access to its SRAM.
General Discussion / Re: Game Gear SMS Plugin Question
« Last post by blue22 on 25/Nov/2019 05:23:36 PM »
I'd like to vote for this, too! Like the PC Engine/TG16 dumper, I'd pay about $29.99 for it!
General Discussion / Re: PC Engine/Turbografx plug in?
« Last post by blue22 on 25/Nov/2019 05:20:16 PM »
If you did a small scale production on these (like the kazzo dumper) I would buy one!!!!!

I'd pay about $29.99 to $39.99 for it! So get to producing it (pretty please)!!!!!
General Discussion / Re: PC Engine/Turbografx plug in?
« Last post by Retrofan on 24/Nov/2019 08:54:59 PM »
I had a nice chat with skaman via PM and decided to go for ordering his PCB as well as the Tototek HuCard slot - trying to mate them at my own risk.

Skaman's PCB as it arrived.

The Tototek Hucard slot.


Underside. The mounting pins are in a different alignment than the original HuCard slot. No suprise here, since the Tototek slot is meant for use with their own dumper PCB.

Side view at the mounting pins. These do not carry any electrical connection to the HuCard interface pins.

I had to drill skaman's PCB to clear the Tototek slot mounting pins. Then I scraped the solder mask from the surface surrounding the pin holes to uncover the copper underneath. I mounted the slot onto the PCB and distributed a generous amount of solder to the mounting pins. Since the copper forms a large heat sink connected to the ground pin, having a soldering station with high thermal capacity and an extra wide tip in the handpiece helps a lot. I went for a Weller WS-81 with a WSP 80 handpiece.

Then I soldered the rest of the interface pins and tested them against the PCB's pins usind a DMM. Some pins are assigned in a different way than found in AaronE's wiring schematic:   

Blazing Lazers HuCard test-fit

And there you have it, the HuCard plugin adaptor for the Retrode. Merrily dumping your HuCard ROMs to any device you'd like to by USB mass storage protocol. Make sure to put the whole adapter thing with the HuCard slot facing to the Retrode's backside in the SNES slot, and set the voltage switch to 5 V. Also, upgrade the Retrode's firmware to at least v0.26a - I didn't do it yet, d'oh! Too bad FLIP refuses to do the upgrade on Windows 10, so I need to make up for it tomorrow at a Windows 7 machine at work.

Modifying a stock SNES cart shell to hold the plugin adaptor is on my to do list as well.
Support / Re: N64 with SRAM lose save files after disconnecting.
« Last post by Whiteboy on 16/Nov/2019 08:17:47 AM »
Ok I was about to backup the saves for Ocarina and Smash Bros. and more like Mario 64 and Goldeneye. So from what I understand, I SHOULD NOT do this for Ocarina and Smash because it will always delete the saves on the cart? I wonder if there is a fix for this?
Support / Help with N64 roms
« Last post by gen_shingar on 13/Nov/2019 07:45:42 AM »
I just used the Retrode to back up my N64 games and am having issues with 2 ROMS.

Destruction Derby 64 which essentially crashes Project64 and Virtual Pro Wrestling 64 which seems to load up (audio) but Project64 stays black screen.

Any ideas on how to solve these issues?
General Discussion / Re: SNES cart slot missing 2 side sockets?
« Last post by ssokolow on 11/Nov/2019 08:16:34 AM »
As I understand it, in the wild, the outer segments of the SNES cartridge connector are used for communicating with coprocessors on the cartridge, which is unnecessary when dumping the ROM.

(Aside from the handful of games like Super Mario RPG and Kirby Super Star which interpose the SA-1 chip between you and the ROM, but you need an extended dumping adapter for those anyway because the Retrode's microcontroller is too busy to successfully fake a CIC sync so the SA-1 will let you in. If you build an extended dumping adapter, it will talk to the SA-1 on the Retrode's behalf using a couple of dedicated timer chips and a PIC programmed to act as a fake CIC host chip.) least, that's what I remember being in the extended dumping adapter. I just beta-tested one I didn't build.
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