The TK 3000 IIe is a personal microcomputer model manufactured by the Brazilian company Microdigital Eletrônica Ltda., compatible with the Apple IIe Enhanced. It was presented to the public at the V International Computing Fair in September 1985, and entered the market in April 1986 with a retail price of Cz$ 12,500.00 (approximately R$ 13,000.00 in updated values as of September 2023). In 1987 an updated version, the TK 3000 IIe COMPACT was released.

Details

Due to Apple using dedicated integrated circuits (ASICs, called ''MMU'' (''Memory Management Unit'' and ''IOU'' ''Input / Output Unit'') in the Apple IIe, copying these became more complicated compared to the

Apple II Apple II ("apple Roman numerals, two", stylized as Apple ][) is a series of microcomputers manufactured by Apple Computer, Inc. from 1977 to 1993. The Apple II (original), original Apple II model, which gave the series its name, was designed ...

and Apple II Plus, which were based on off-the-shelf integrated circuits. For this reason, Microdigital had to Reverse engineering, reverse engineer these components to achieve compatibility with the Apple model. Microdigital designed two dedicated integrated circuits used in the TK 3000 IIe, the MC168300 and the MC168310, performing functions similar to the ''MMU'' and ''IOU'' integrated circuits, respectively. A complete

Zilog Z80 The Zilog Z80 is an 8-bit computing, 8-bit microprocessor designed by Zilog that played an important role in the evolution of early personal computing. Launched in 1976, it was designed to be Backward compatibility, software-compatible with the ...

computer (CPU + RAM + ROM) is used for keyboard control replacing the AY-5-3600 keyboard controller integrated circuit used in the Apple model, adding some functional features like accented characters. The TK 3000 IIe was sold with two different cover models: One simple, flat, like any Apple II case, and another with space for two slim 5.25″ disk drives, making them embedded in the case.

Technical specifications

* CPU:

WDC 65C02 The Western Design Center (WDC) 65C02 microprocessor is an enhanced CMOS version of the popular nMOS-based 8-bit MOS Technology 6502. It uses less power than the original 6502, fixes several problems, and adds new instructions and addressing ...

(1MHz);

(2MHz) * Memory: 16KB ROM; 64 KB RAM * Keyboard: 77 keys,

QWERTY QWERTY ( ) is a keyboard layout for Latin-script alphabets. The name comes from the order of the first six Computer keyboard keys#Types, keys on the top letter row of the keyboard: . The QWERTY design is based on a layout included in the Sh ...

layout * Video: up to 280x192, 6 colors; extra modes with memory expansions;

PAL-M PAL-M was the analog color TV system used in Brazil since early 1972, making it the first South American country to broadcast in color. It is unique among analog TV systems in that it combines the 525-line 30 frames-per-second System M ...

RF and composite out * Expansion: 7 internal Apple II slots, 1 external Apple IIe slot; * Peripherals: analog game port; cassette port

TK 3000 IIe COMPACT

The TK 3000 IIe COMPACT, released in June 1987, had the same features as the TK 3000 IIe adding more memory, 80 column text display, printer interface, interface for two disc drives, but only had the single external expansion slot. The case was similar to the one used in the TK 2000.

Technical specifications

* CPU: WDC 65C02 (1MHz); Zilog Z80 (2MHz) * Memory: 32KB ROM; 64 + 64 KB or 64 + 256 KB RAM * Keyboard: 77 keys, QWERTY layout,

numeric keypad A numeric keypad, number pad, numpad, or ten key, is the calculator-style group of ten numeric keys accompanied by other keys, usually on the far right side of computer keyboard. This grouping allows quick number entry with right hand, ...

* Video: up to 560x192, 16 colors; PAL-M RF and composite out * Expansion: 7 internal Apple II slots, 1 external Apple IIe slot; * Peripherals: analog game port; two Apple 5.25" disk drives;

printer port In computing, a parallel port is a type of interface found on early computers (personal and otherwise) for connecting peripherals. The name refers to the way the data is sent; parallel ports send multiple bits of data at once (parallel c ...

References

{{Reflist Microdigital Eletrônica Apple II clones