Search found 30 matches

by emerson
Sun Apr 26, 2020 2:01 pm
Forum: NES Hardware and Flash Equipment
Topic: Famicom Expansion Port Multiplexer
Replies: 13
Views: 1695

Re: Famicom Expansion Port Multiplexer

Yes I am aware of the deeper sockets, thanks anyhow for the head's up. I plan on modding standard db15 connectors for testing. I found these neo geo controller replacement cables which show all 15 wires are present. They also have cable strain relief is a nice addition. https://www.ebay.com/itm/Cont...
by emerson
Sat Apr 25, 2020 5:15 pm
Forum: NES Hardware and Flash Equipment
Topic: Famicom Expansion Port Multiplexer
Replies: 13
Views: 1695

Re: Famicom Expansion Port Multiplexer

Thank you lidnariq for the help. Schematic and logisim files have been updated.
by emerson
Sat Apr 25, 2020 1:08 pm
Forum: NES Hardware and Flash Equipment
Topic: Famicom Expansion Port Multiplexer
Replies: 13
Views: 1695

Re: Famicom Expansion Port Multiplexer

Ahh okay, that makes sense now. Looking at the schematics on the Console5 website and Enri's page on the keyboard, the OUT2-0 lines do not have pull-up resistors in either the console or name brand peripherals. Some third party controllers do though. Based on what I've learned over the past few hour...
by emerson
Sat Apr 25, 2020 12:20 pm
Forum: NES Hardware and Flash Equipment
Topic: Famicom Expansion Port Multiplexer
Replies: 13
Views: 1695

Re: Famicom Expansion Port Multiplexer

... although now that I'm thinking on this a little more carefully, I think you need pullups all over the place before your '244s inputs. For what it's worth, after reading a few websites, it seems like as long as the CMOS input is driven by another gate i should be okay. Unless this is specific to...
by emerson
Sat Apr 25, 2020 11:32 am
Forum: NES Hardware and Flash Equipment
Topic: Famicom Expansion Port Multiplexer
Replies: 13
Views: 1695

Re: Famicom Expansion Port Multiplexer

I didn't have a personal use for the /IRQ line but I figured I'd add it for the sake of completeness. So if I understand correctly, the sound pin is actually an output and not an input? The idea behind this circuit started when I wanted to have both the family basic keyboard and gameboy printer conn...
by emerson
Sat Apr 25, 2020 10:57 am
Forum: NES Hardware and Flash Equipment
Topic: Famicom Expansion Port Multiplexer
Replies: 13
Views: 1695

Famicom Expansion Port Multiplexer

=====UPDATED V2 schematic and logisim files===== - /IRQ circuitry removed - changed circuit to handle positive idle clock lines - added pull-up resistors to peripheral $4017 data lines I've been playing with the idea of having multiple peripherals connected to the famicom expansion port and came up ...
by emerson
Thu Dec 19, 2019 3:07 am
Forum: Homebrew Projects
Topic: NES Gameboy Printer Projects
Replies: 5
Views: 4315

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: 4315

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: 5278

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: 6108

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: 6108

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: 20322

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: 12974

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: 28
Views: 17601

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: 28
Views: 17601

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 ...