Search found 24 matches

by emerson
Thu Dec 19, 2019 3:07 am
Forum: Homebrew Projects
Topic: NES Gameboy Printer Projects
Replies: 5
Views: 1137

Re: NES Gameboy Printer Projects

I bought 38mm (1.5") thermal paper for this project and it works without issue. You just have to spool out 30' or so at a time and roll it up to fit in the printer. Do not buy official gameboy printer paper since the thermal reactive chemical has neutralized by now and will not work. If anyone finds...
by emerson
Wed Dec 18, 2019 6:52 pm
Forum: Homebrew Projects
Topic: NES Gameboy Printer Projects
Replies: 5
Views: 1137

NES Gameboy Printer Projects

I've been working on interfacing the gameboy printer with the NES. Below you will find some code and a rom of my work thus far. The code contains details on how to make the interface cable so please have a look. The printer engine is at the bottom of the code. The rom is an ascii art generator. In t...
by emerson
Mon Dec 02, 2019 4:34 pm
Forum: NES Hardware and Flash Equipment
Topic: fds drive schematics
Replies: 0
Views: 1185

fds drive schematics

Since I couldn't find these anywhere on the internet I decided to draw some up. I was working on a 3206 write mod and noticed some differences between that pcb and a 7201 pcb. Most notably are some transistors and passive components missing around the magnetic head connector. The boards seem to have...
by emerson
Fri Aug 16, 2019 4:11 pm
Forum: NESemdev
Topic: FCEUX famicom expansion port IO to parallel port on pc?
Replies: 7
Views: 5003

Re: FCEUX famicom expansion port IO to parallel port on pc?

Thanks for the responses everyone. If I can find some time this weekend I'll break out the Win98 laptop and see if I can get inpout32 working.

I've never done work like this before. Can I modify an external file or do I need to download the fceux source and rebuild it with my changes?
by emerson
Thu Aug 15, 2019 4:40 pm
Forum: NESemdev
Topic: FCEUX famicom expansion port IO to parallel port on pc?
Replies: 7
Views: 5003

FCEUX famicom expansion port IO to parallel port on pc?

Is it possible to place $4016 out0-2 lines and $4017 D0-D4 on the parallel port of a pc? If so, how would I go about doing this? I'm in the middle of some hardware design and it would make testing much easier if I didn't have to reflash an EEPROM for every test.
by emerson
Fri Mar 22, 2019 9:36 am
Forum: NES Hardware and Flash Equipment
Topic: NES Rumble Controller
Replies: 23
Views: 18613

Re: NES Rumble Controller

I came up with a new control scheme last night for the rumble controller. Now (in theory) you will be able to do the following: -independently control the vibration strength each motor in the controller -read the current vibration status of each motor -detect that a rumble controller is present Bein...
by emerson
Tue Mar 12, 2019 5:40 am
Forum: Homebrew Projects
Topic: Nalleland
Replies: 22
Views: 10259

Re: Nalleland

I really like this game. Everything I thought to test you already had covered, like 8-way throwing, which became essential later in the game. I found the first gem completely by accident, but when I found it i knew this game would be fun. I'm excited to see where this game goes.
by emerson
Mon Jan 28, 2019 5:17 am
Forum: NES Hardware and Flash Equipment
Topic: Rainbow : a WiFi cart / mapper for the NES !
Replies: 11
Views: 9021

Re: Rainbow : a WiFi cart / mapper for the NES !

Thinking about it with my morning cup of coffee, a reprogrammable cartridge would be the simplest solution for both production and the end user. This may be a silly question, but have you done any testing with the ground shields on? My wifi router is two stories below my NES and I'm curious if that ...
by emerson
Sun Jan 27, 2019 8:16 pm
Forum: NES Hardware and Flash Equipment
Topic: Rainbow : a WiFi cart / mapper for the NES !
Replies: 11
Views: 9021

Re: Rainbow : a WiFi cart / mapper for the NES !

Glad to see you got this working, this is exciting! Can I ask what changes had to be made to FCEUX to get communications working with your cartridge? Do you have an idea on what the end product will be, or what you would like it to be? If I can give my two cents, my first thought was something like ...
by emerson
Sun Sep 02, 2018 8:16 am
Forum: NES Hardware and Flash Equipment
Topic: NES Rumble Controller
Replies: 23
Views: 18613

Re: NES Rumble Controller

When I was talking to kevtris about controlling a rumble motor like this, he suggested using the latch/OUT0 line. So sending the control byte via the latch line instead of counting clock cycles? That would keep timing equal regardless of the information being sent. The rs232 isn't a bad idea either...
by emerson
Thu Aug 30, 2018 5:09 am
Forum: NES Hardware and Flash Equipment
Topic: NES Rumble Controller
Replies: 23
Views: 18613

Re: NES Rumble Controller

Did a little shopping around and it seems like I have a few options for low current motors so that's good. I've tried the coin motors before. They're noisy and don't produce enough vibration so I want to stick with cylindrical motors. I think having the game controlled PWM is a great idea! I have a ...
by emerson
Tue Aug 28, 2018 5:06 pm
Forum: NES Hardware and Flash Equipment
Topic: NES Rumble Controller
Replies: 23
Views: 18613

Re: NES Rumble Controller

I found that increasing the capacitor I have between 5v and ground to 1000uf helps a lot but still isn't perfect. Interference on the audio channel is gone as well as the audible hum. The data line still has interference on the logic low portion of the signal. I'll try the low pass filter idea and s...
by emerson
Tue Aug 28, 2018 1:25 pm
Forum: NES Hardware and Flash Equipment
Topic: NES Rumble Controller
Replies: 23
Views: 18613

Re: NES Rumble Controller

I never noticed anything obvious like static or cpu glitch. I put the scope on the audio and video pins going to the rf box and found about 18mV of interference on the audio line. I use a Commodore 1702 for my development monitor and never turn the volume past 1/3, but an audible hum can be heard if...
by emerson
Tue Aug 28, 2018 4:05 am
Forum: NES Hardware and Flash Equipment
Topic: NES Rumble Controller
Replies: 23
Views: 18613

Re: NES Rumble Controller

The motors are rated at 90 milliamps each. I know that transistor package is unnecessarily large for the job but it was what I had at the time. Here are a few current measurements I took. Controller w/ ammeter between white wire and controller port: motors on ~ 185mA motors off ~ 1.82mA 7805 w/ amme...
by emerson
Mon Aug 27, 2018 7:47 pm
Forum: NES Hardware and Flash Equipment
Topic: NES Rumble Controller
Replies: 23
Views: 18613

Re: NES Rumble Controller

Just a beefy transistor to control the motors.