List of 65816 Systems - Old/New; Commercial and Home-brew

[drogon]

Creating this as following on from a previous thread (viewtopic.php?f=4&t=2438&p=75131#p75130) just to list out some WDC 65816 systems that exist out there and a brief description of their capabilities. Please add to it with your own system(s).

Old commercial 65816 systems:

• Apple //gs: https://en.wikipedia.org/wiki/Apple_IIGS
  Released 1986
  Possibly the most well known and popular 65816 system.
  2.8Mhz CPU, 256KB or 1MB as standard, expandable to 8MB.
• The Super Nintendo Entertainement System (SNES): https://en.wikipedia.org/wiki/Super_Nin ... ent_System
  Home video games console.
  Released 1990
  3.58Mhz Ricoh 5A22 CPU - a mostly 65816 compatible CPU but also included video generation circuitry, DMA as well as multiplication and division support registers.
• The Acorn communicator: https://en.wikipedia.org/wiki/Acorn_Communicator
  Released 1985
  2Mhz, 512KB to 1MB of RAM. Aimed at businesses with a built-in modem (for the UKs PRESTEL service)
  (This is the same Acorn who made the 6502 based BBC Micro and created the ARM processor)

New/Current commercial systems:

• Foenix (c256Foenix): https://c256foenix.com/
  Initially created as an answer to the 8-bit guy's call for his "ideal" micro, it's now taken on a life of it's own.
  14Mhz 65816, 4MH System RAM, 4MB Video RAM, 256KB Flash, 3 custom FPGAs to handle graphics and sound.
• Neon816: https://hackaday.io/project/164325-neon816
  Although note the discussion group is on Facebook.
  65816 (not sure the speed), 1MB RAM, 512KB Video RAM, custom FPGA to handle video, etc. Mini ITX board format.
  Development seems to have stalled on this right now though - some units have been sold, but the Facebook group has been quiet for a while.

That's all I know on the commercial front - please do add to this thread any others you know about.

-Gordon

[drogon]

Adding my own WDC 65816 system here:

My Ruby816 is the next development of my Ruby6502 SBC. (Ruby to celebrate, in 2018 my 40th year of dabbling with the 6502).

It's a very simple design; 65816 + 65C22 + 512KB of RAM and runs at 16Mhz. 2 GALs handle the data/address multiplexing and address decoding. IO is currently via a "host" processor which is an ATmega 1284p. This handles serial communication and runs the SD card based filing system (own design, based on Apple ProDOS) as well as providing bootstrap facilities for the 65816 (which has no ROM).

The 6522 provides some GPIO and clock timer facilities. future plans include a simple peripheral bus connected to the 6522 rather than a full-blown CPU bus. An intelligent terminal program can be used to provide graphics, sound, sprites and so on on a desktop PC, or a simple ANSI compatible text terminal with the text/cursor movements being handled via the operating system independent of the application code running on the '816.

The current operating system (there is no "monitor" as such) is based on the Acorn MOS and provides a command-line environment capable of running programs, doing various disk operations and 'ftp' files to/from the host via serial line. (in a similar way that CP/M is a command-line operating system) It runs BBC Basic in 6502 emulation mode and I can compile and download C program compiled with cc65 into it but these don't makes use of the full 65816 facilities.

I'm working on a multi-tasking working environment and a self-hosting high level language capable of compiling and running directly on the board without any cross compiling/assembling required.

Cheers,

-Gordon

[RalfK]

There was an addon board for the RamWorks board in the Apple IIe.

A bit more: the Apple IIe has a special slot called Auxiliary Slot which normaly was occupied by a simple 64kB RAM card. Applied Engineering developed some boards with 512kB, 1MB and more called RamWorks. This 65816 board is an addon to the RamWorks II.
http://mirrors.apple2.org.za/Apple%20II ... it%20Card/

I don't know anything about production and number of sold boards.

[Chromatix]

The ReCo6502 was a comparatively recent upgrade board for external Second Processor boxes for the BBC Micro. It was capable of accepting either a 65C02 or a 65C816, with distinct ROMs being provided to support each. It's no longer in production AFAIK.

There's also the SuperCPU for the C64. That's a 65C816 run at a blistering 20MHz - until it has to come to a screeching (comparative) halt to access the original C64 hardware.

[BigEd]

Daryl's SBC 3
http://sbc.rictor.org/info3.html

and SBC 4
http://sbc.rictor.org/info4.html

are both 816 systems.

[BigEd]

And BDD's POC 1 and POC 1.2 are both 65816 systems...
viewtopic.php?f=4&t=1457

Bitwise has built a system around the SXB (W65C816SXB)

And the beeb816 by revaldinho and me is an 816 upgrade to a BBC Micro...

[BitWise]

BigEd wrote:

Bitwise has built a system around the SXB (W65C816SXB)

To be fair most of my tinkering has been with the W65C265SXB (e.g. memory expansion, CH376S interfacing).

Does my three chip board support for the 65C802 count? Its a very limited '816.

[handyandy]

There is an addon board for Atari 65XL/XE 8 bit computers (Rapidus/Antonio) and 65816 support provided

http://drac030.krap.pl/en-specyfikacja.php

Cheers,
Andy

[jmthompson]

There is also my COLE-2 SBC, https://www.area73.us/cole-2/