The website N64Squid has a page dedicated to Nintendo 64 development hardware that is well worth a look: Nintendo 64 development hardware - N64 Squid. This page aims to compliment that page and give additional details about the hardware, so it is recommended you read that page first 1.
In the very early days of the Ultra 64 project the retail hardware was still under active development, but games would need to start development as soon as possible so that the system could have launch titles.
As there was no ready hardware to use early developers for the platform used the
SGI Onyx as it was presumed that the hardware would be very similar, they were envisioning the N64 as just a stripped down version of this workstation, mainly due to their partnership with SGI for the graphics.
The earliest mention of the SGI Onyx being used as an early development kit for the Nintendo 64 was in the Edge UK magazine issue 20 from May 1995. 2.
As the N64 hardware matured so did the development hardware, the
Nintendo 64 Development Unit was one of there first evolutions of the development kit and was sold directly by Nintendo from October 1996 onwards.
It consisted of a standard SGI Indy workstation with an add-on board containing the N64 hardware.
This has the benefit of not using any workstation hardware resources to run the games as it used the N64 hardware directly and just communicated with it for debugging 3.
The add-on board slips into the SGI Indy workstations case and has pretty much all the hardware from a retail console, with a few changes to allow the communication between the IRIX operating system and the hardware.
You can see the standard SNES/N64 A/V out socket in the back on the Indy, apart from this the connectivity was very sparse. The controllers connected via another bit of hardware and are not on the add-on board at all.
If you look closer you will notice that there is a number of ethernet ports which actually go to the add-on board. These are used to connect to multiple development hardware including an adapter for retail controllers which can be seen in a tweet from Shane Battye .
But wait a minute; don’t u64 development boards require a ‘Joybus’ adapter?— Shane Battye (@shanebattye) September 21, 2019
Yep, but only if they’re interfacing with retail type controllers (which may have been available not too long after RJ-11 development controllers)... pic.twitter.com/kY3wOjPQug
Nintendo 64 Development Unit later evolved into the
Partner-N64 series of hardware by KMC (Kyoto Microcomputer, Co. Ltd.) and consisted not only of hardware for the SGI workstations but also created a version that worked on standard Windows PCs!
Nintendo 64 Development Unit this development kit didn’t contain an add-on board and instead connected directly to a modified retail N64. This was achieved using a custom cartridge known as a
Debugger Pak slotted in the N64 with a network adapter that could be connected directly to an SGI workstation such as an Indy 4.
The Partner-N64PC was another full official development kit by KMC (Kyoto Microcomputer, Co. Ltd.) specifically for Windows PCs.
The SDK that comes with the Partner-N64PC was provided by Metrowerks (Codewarrior).
Fun Fact! The official Nintendo #N64Dev Kit released by Kyoto Microcomputer, was called the "PARTNER-N64". The Kit was actually available in two versions. One for Windows PC, and the second for the SGI INDY. This was KuC's way of attracting Game Studios using SGI INDY equipment. pic.twitter.com/mLfbZRFZeH— Gerry_MAN (@GerryRobotics) June 19, 2019
Debugger Pak was used by both Partner-N64PC and Partner-N64NW, it functioned similarly to the standard
Game Pak but were longer and had the connection port at the top for connecting to the PC. This allowed full debugging support such as breakpoints and stack traces to be used.
The ISA card was a small add-on card that could be slotted a the standard PC’s ISA bus slot and contained just enough hardware to allow communication over the port.
The ISA card comes as part of the Partner-N64PC pack but you could also buy a PCI version separately for $350 5.
Notice that there are DIP switches at the top of the board that need to be configured before installing to make sure that the I/O addresses for communication match the PC.
In order to use the Partner64 the retail N64 console hardware had to be modified, these normally came with the development kit when you bought the Partner64 or you could buy a separate one for about $200 5.
Ultra64.ca has an excellent tutorial which shows you how to create your own Partner N64 development kit for home-brew development, very cool! It is available here: Make your own Partner N64 console, for use with IS Viewer : Nintendo (Ultra) 64
The official Partner64 development kit was quite popular and used both inside and outside of Nintendo.
Here is a list of games that still contain KMC Partner64 debug code thanks to a Pastebin by user
Also on display will be a #64DD dev kit with Monegi Smart Pack. These setups were probably the last ‘official’ N64 development systems and likely used for later Hudson titles as well as being sold alongside the CodeWarrior IDE. They supported 512mb ROMs and 64DD out of the box pic.twitter.com/We3h3ahXa3— Shane Battye (@shanebattye) October 5, 2019
The IS-Viewer64 or IS64 for short was the official way to create a N64 prototype cartridge than ran on a modified version of retail hardware. It is a flash cart created by Intelligent Systems (hence the IS prefix) and was released as part of the official N64 development kit. This did not have debug support such as breakpoints and stack traces and this was much cheaper than alternatives. Although It cost around 1800 USD on release so was still an expensive solution 7.
The main benefit of the IS-Viewer64 over alternative flash carts available to developers was the crazy fast transfer speed, allowing games to be written to the onboard RAM in as little as 30 seconds! 8.
The IS-Viewer 64 was used to develop the two Zelda games (Oracle of Time, Majoras Mask) and still contains some code to write out debug messages to a connected PC on the retail ROM 9.
Here is a list of games that still contain IS64 debug code thanks to a Pastebin by user
Rewritable Prototype cartridges were available to buy and came in 128Mb, 256Mb and 512Mb configurations, with the largest capacity being the most expensive.
These were given out to journalists to preview/review the games in their magazines before the official launch of the game along with being used to demonstrate upcoming games at tradeshows such as E3 10.
They are double the size of regular N64 games and they are actually re-writeable 7 at a time using a flashing device by Intelligent systems.
You can view a cached version of the official Sn systems SN64 development kit thanks to Icequake SN64 Nintendo64 Development Tools
Check this out!!— Gerry_MAN (@GerryRobotics) October 4, 2019
I recently acquired these #N64dev cartridges called the “SN64” and the “Maestro64”.
Manufactured by the company:
“SN Systems”. The more Rare of the two is the Maestro64, which was used for N64 Sound development. #N64 #RETROGAMING https://t.co/9vvlB1MOQ7 pic.twitter.com/NRHoj2Uu34
Nintendo released multiple hardware for Sound designers to test their creations on the real hardware without having to bug the developers to borrow a full development machine.
The SDK also came with the
N64 Sound Tools and
MusyX Audio Tools which contain software such as a sound sample editor which used a format similar to MIDI 11.
Gerry_MAN has taken some excellent photos of his NUS-SUD on Twitter along with photos of him actually managing to connect and send data from his PC to the hardware!
Check this out!— Gerry_MAN (@GerryRobotics) 10 October 2019
The #N64dev SoundTools Dev cart streams Music or samples in real-time to the #N64. Sent over an LPT printer cable. Notice the white squares? @ the bottom of the screen?
Sound PEAK meters!!
Inactive when the Cart is not streaming sound.
Pretty cool!! #RETROGAMING pic.twitter.com/ZpgL1RtSdD
For the Updated version 3.0 of the ROM you can actually see the pre-existing peak meter pixels as they are just slightly visible...as shown in the image below. Would be cool to get a Version 3 of the SoundTools cart someday.— Gerry_MAN (@GerryRobotics) 10 October 2019
The full n64 development kit was used by Sound designer Grant Kirkhope at Rare to produce masterpieces such as Banjo-Kazooie and GoldenEye. This consisted of a Silicon Graphics Indy with the N64 hardware used as an extension inside it 11.
Hmmm I don’t think I did. I had a Silicon Graphics Indy computer with the Ultra 64 circuit board inside it. I connected my PC to it via midi— Grantilda Von Scarehope (@grantkirkhope) October 10, 2019