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C > COMMODORE  > C65     


Another case of vaporware ! In the end of 1990, Commodore decided to create a successor for the famous C64.They worked on a prototype called C64 DX then C65.

The C65 had new great features : a very special version of the 7510 with lot of new opcodes, great graphic modes (better than the Atari ST or the Amiga !) and a great new processor : the DMA / Blitter. This chip can be programmed with a list of instructions to copy or set blocks of memory.

The machine was meant to be fully compatible with the C64, but wasn't. A special key was added on the keyboard to switch between the two modes (C64 / C65).

The development of this machine was stopped (apparently because of problems with the VIC III controller and because of the cost of this computer), and because of the success of the Amiga (Notice that the C65 case looks like the Amiga one !).

Commodore produced about 50 C65's, the first ones display C64DX at boot, the latest display C65.

We need more info about this computer ! If you designed, used, or have more info about this system, please send us pictures or anything you might find useful.



I do not think there was a special button to execute the transition between c65 and c64, but a particular power mode.
Holding down the C$ key and turning the computer on, it went directly to c64.

Saturday 2nd April 2016

i think it was the best thing commodore did with the commodore 65 but.... amiga commes ....

Tuesday 28th October 2014
rendomizer  (france)

someone correct me if im wrong but the c65 compared to a c64 would be like an apple IIgs compared to an earlier apple II

Saturday 6th September 2014


TYPE  Home Computer
YEAR  1990
KEYBOARD  77 keys, including standard C64 keyboard + 8 function keys, TAB, Escape , ALT, CAPS Lock, no scroll, help
CPU  CSG4510
SPEED  1.02 or 3.5 Mhz depending models
CO-PROCESSOR  Video : Commodore CSG 4567 enhanced VIC chip
Sound : Commodore CSG8580 SID chips
RAM  128 KB (DRAM), externally expandable from additional 512K bytes to 4MB
ROM  128 KB (including C64 Kernel and BASIC 2.2, C65 Kernel, Editor, BASIC 10.0, ML Monitor (like C128), DOS v10)
TEXT MODES  40 x 25 (C64 Mode), 80 x 25 (with blink, bold and underline attributes)
GRAPHIC MODES  All C64 modes (320 x 200 bitmap mode) + 320 / 640 / 1280 x 200 / 400 in 2, 4 or 8 planes, interlaces and non-interlaced
COLORS  Programmable 256-color RAM palette, with 16 intensity levels per primary color (yielding 4096 colors)
SOUND  Dual 8580r5 SID Sound chips. 6 voices, 3 per channel
I/O PORTS  RF video output jack, Analog video RGB port (DB-9), Composite video/audio port, Joystick (2), Cardridge slot, Tape, Serial bus port, User Port (RS232 compatible), RAM Expansion port, External floppy drive port, 2 x controller ports, Stereo audio output
BUILT IN MEDIA  Built-in 3.5'' double sided, 1MB MFM capacity drive
POWER SUPPLY  External power supply unit, +5VDC at 2.2A and +12VDC at .85A



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