Other computer of the c264 series: C16 and C116.
In contrast to the C16 is the keyboard layout and labeling is logical. The arrow keys are separate and better located. In addition, the keyboard is very flat and pleasant. Like the C16, there is a help key rather than F8 key used to indicate errors in BASIC programs.
Due to the compact design, not all ports have room on the back. On the left side is, therefore, the RF modulator.
The connections on the right: For the first time in Commodore home computers there is a built-in reset switch. This is very useful and relatively easy to reach. There is also the power switch.
On the Rear there are most ports, the far left is the angular power supply connector (special). Later models have a round connector, so that a C64 power supply can be used. Then there is the serial port and the Datasette port. The latter has a modified connector and is compatible with the model 1531. Then follows the user port, then the memory expansion slot. Further right are the two modified joystick connectors. You had to buy special Commodore joysticks or adapters to use regular joysticks. On the far right the video connector is seated.
The underside of the Plus4 with the nameplate. On Plus4, C16 and C116 you can read also "C264 series".
The compact mainboard of the Plus4: On the left there is the upper housing part. The ribbon cable is connected to the keyboard connector. To the right there are several ROM chips (BASIC, 3plus1 software, etc.). The little chips are RAM chips. Under the metal case there is the Multifunction Chip TED responsible for audio and graphics. On the right there is the CPU.
The power supply from Plus4 is identical to the one used with C64 except the black color. It had a round or square power connector, fitting the delivered Plus4 version.
Like the VIC20 and C64 the Plus4 is packed into a styrofoam box with two parts. In addition to the computer there is also a power supply and the manual (under the computer) included. The outside of packaging shows a picture of the product.
Later there was also a package consisting of Plus4, Datasette 1531 and "learning BASIC"-cassette. The box of the "computer learning course" package contains the Plus4 packaging shown above and the Datasette model 1531 in one big package.
German versionFirst time after VIC20 and C64 there was a German keyboard layout available on a Commodore homecomputer. But this version was only sold for a short period of time and therefor is rare. The Plus4 was mainly delivered in the standard version with English ROMs and US layout. It was the successor C128 that had a more widespread country-specific adaptation.
The US keyboard with QWERTY layout was adjusted with stickers to the German standard QWERTY
The standard-ROMs have been replaced by (erasable and programmable) EPROMs. This type of chips was used mainly for small quantities - a special ROM IC as the default built-ROMs is only economical for large scale production.
This Plus4 was produced in Germany and has a low serial number. This suggests that the German character set (QWERTY) initially planned and was available, but later only the international version with US layout (QWERTY) was delivered.
The message how to start the 3-plus-1 software on the startup screen was translated to German language. In BASIC there are no changes, but the German character set is also used in the 3-plus-1 software.
Canadian versionIn 1984 Commodore sponsored the Winter Olympics and because of that they released a special packaging for the Plus4 in Canada. It featured the maple leaf flag and the Olympic rings. In addition, the plus/4 logo was changed to +4. Otherwise there are no changes, and technically this version is identical with the regular Plus4. NTSC version.
Only the logo was changed, otherwise it is a normal Plus4 with QWERTY keyboard and NTSC video standard.
Closeup of the +4= logo.
The Plus4 has 64 KB of memory of which are about 60 KB for BASIC programs available. In addition, he has built-in "3 plus 1" software, that can be started with F1 or the command "SYS 1525". The BASIC version 3.5 is greatly expanded from earlier versions. There are e.g. commands for graphics and sound. Again, the colors were changed, this time white with purple. The font is black and therefore easy to read.
The 3 Plus 1 software (word processing, spreadsheet, file manager and graphics program), which is permanently installed in the computer at that time was unique. Unfortunately, all three programs are quite limited. The word processor and spreadsheet is limited to a few characters. The graphics program can graphically display the tables. Unfortunately, not the graphics capabilities of the computer are used, but only simple strings. In addition, there is a file manager. All programs require floppy 1551 to save the data. On the right you can see the spreadsheet application.
Here is a screen shot of the built-in word processing. A line consists of a maximum of 77 characters, which then scrolls to the right. You cannot see the whole line at once. Moreover, the word processor as mentioned above is also quite limited: maximum 99 lines at 77 characters long.
Rare German Plus4 version in CCV video.
|Launch Price:||€ 285|
|Processor:||MOS 7501/8501 (1,76 MHz)|
|Operating system:||BASIC 3.5|
|graphics chip:||8360 (TED)|
|Resolution:||Up to 320x200|
|Sound:||2 voices, mono|
|Size:||200 x 333 x 66 mm|
Datasette (special connector)
2xJoystick (special connector)
The above shown computers are in the collection!
Compatible drives for the computer Plus4: