MOS Technology TED

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TED pinout

The 7360 Text Editing Device (TED) was an integrated circuit made by MOS Technology. It was a video chip that also contained sound generation hardware, DRAM refresh circuitry, interval timers, and keyboard input handling. It was designed for the Commodore Plus/4 and 16. Packaging consisted of a JEDEC-standard 48-pin DIP.

1 Video capabilities
2 Sound capabilities
3 Other features
4 Notes
5 External links

[edit] Video capabilities

The video capabilities provided by the TED were largely a subset of those in the VIC-II. The TED supported five video modes:

Text mode of 40x25 characters
Multicolor text
High-resolution text
Multicolor Graphics 160 x 200 pixels
Hi-Res Graphics 320 x 200 pixels

These were largely unchanged from the corresponding VIC-II modes. However, the TED lacked the sprite capabilities of the VIC-II, making it unsuitable for most action games. The TED did include one feature that the VIC-II lacked: luminance control. Fifteen of its 16 colors (black being the sole exception) color could be assigned one of 8 luminance values, thus making the TED capable of displaying a far wider array of colors than the VIC-II. The full palette of 121 colors is shown below.^[1]

hue / luminance	0	1	2	3	4	5	6	7
1 — black	1,0	1,1	1,2	1,3	1,4	1,5	1,6	1,7
2 — white	2,0	2,1	2,2	2,3	2,4	2,5	2,6	2,7
3 — red	3,0	3,1	3,2	3,3	3,4	3,5	3,6	3,7
4 — cyan	4,0	4,1	4,2	4,3	4,4	4,5	4,6	4,7
5 — purple	5,0	5,1	5,2	5,3	5,4	5,5	5,6	5,7
6 — green	6,0	6,1	6,2	6,3	6,4	6,5	6,6	6,7
7 — blue	7,0	7,1	7,2	7,3	7,4	7,5	7,6	7,7
8 — yellow	8,0	8,1	8,2	8,3	8,4	8,5	8,6	8,7
9 — orange	9,0	9,1	9,2	9,3	9,4	9,5	9,6	9,7
10 — brown	10,0	10,1	10,2	10,3	10,4	10,5	10,6	10,7
11 — yellow-green	11,0	11,1	11,2	11,3	11,4	11,5	11,6	11,7
12 — pink	12,0	12,1	12,2	12,3	12,4	12,5	12,6	12,7
13 — blue-green	13,0	13,1	13,2	13,3	13,4	13,5	13,6	13,7
14 — light blue	14,0	14,1	14,2	14,3	14,4	14,5	14,6	14,7
15 — dark blue	15,0	15,1	15,2	15,3	15,4	15,5	15,6	15,7
16 — light green	16,0	16,1	16,2	16,3	16,4	16,5	16,6	16,7

[edit] Sound capabilities

The TED featured a simple tone generator that produced two channels of audio. The first channel produced a square wave, and the second could produce either a square wave or white noise. This tone generator was designed for business applications, and did not provide the extensive sound features found in the SID chip.

[edit] Other features

The TED includes three 16-bit interval timers, which consist of down counters operating at the master clock frequency. They can generate IRQs on underflow. The chip also contains an I/O port, which is used on the Plus/4 and 16 to scan the keyboard and joystick. In addition, it handles bank switching, used by the operating system to maximize the amount of RAM available to Commodore BASIC.