TK-3000 IIe
 | |
| Manufacturer | Microdigital Eletrônica |
|---|---|
| Type | Personal computer |
| Release date | April 1986 |
| Discontinued | June 1987 |
| CPU | WDC 65C02 ; Zilog Z80 @ 1 MHz; 2 MHz |
| Memory | 64 KB |
| Display | PAL-M RF and composite; up to 280x192, 6 colors (extra modes with memory expansions) |
| Sound | Beeper |
| Backward compatibility | Apple IIe Enhanced |
The TK 3000 IIe is a personal microcomputer model manufactured by the Brazilian company Microdigital Eletrônica Ltda., compatible with the Apple IIe Enhanced.[1] It was presented to the public at the V International Computing Fair in September 1985,[2] and entered the market in April 1986 with a retail price of Cz$ 12,500.00[1] (approximately R$ 13,000.00 in updated values as of September 2023).[3] In 1987 an updated version, the TK 3000 IIe COMPACT was released.[4]
Details
[edit]Due to Apple using dedicated integrated circuits (ASICs, called MMU (Memory Management Unit and IOU Input / Output Unit) in the Apple IIe,[5] copying these became more complicated compared to the Apple II and Apple II Plus, which were based on off-the-shelf integrated circuits. For this reason, Microdigital had to 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,[6][7] performing functions similar to the MMU and IOU integrated circuits, respectively.
A complete Zilog Z80 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.[8]
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
[edit]- CPU: WDC 65C02 (1MHz); Zilog Z80 (2MHz)
- Memory: 16KB ROM; 64 KB RAM
- Keyboard: 77 keys, QWERTY layout
- Video: up to 280x192, 6 colors; extra modes with memory expansions; PAL-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
[edit]| Manufacturer | Microdigital Eletrônica |
|---|---|
| Type | Personal computer |
| Release date | June 1987 |
| CPU | WDC 65C02 ; Zilog Z80 @ 1 MHz; 2 MHz |
| Memory | 64 + 64 KB; 64 + 256 KB |
| Removable storage | 5.25" disk drives |
| Display | PAL-M RF and composite out; up to 560x192, 16 colors; |
| Sound | Beeper |
| Backward compatibility | Apple IIe Enhanced |
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.[4] The case was similar to the one used in the TK 2000.
Technical specifications
[edit]- 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
- 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
References
[edit]- ^ a b "Seção bits - Microdigital: lançamentos e serviços". Micro Sistemas. No. 54. May 1986. p. 24.
- ^ "Informática 85 - Muitas Opções: O Comprador Dita as Tendências". Micro Sistemas. No. 50. November 1985. p. 64.
- ^ "BCB - Calculadora do cidadão".
- ^ a b "Equipamentos lançados pela Microdigital Eletrônica Ltda". Clube do TK90X. Retrieved 2024-07-22.
- ^ "Chapter 7 – Hardware Implementation". Apple IIe Technical Reference Manual. California. June 1985. pp. 157–197. ISBN 978-0-201-17720-6.
{{cite book}}: CS1 maint: location missing publisher (link) - ^ GOMES, 1985, Microdigital, Esquema Elétrico
- ^ MOISÉS, 1986, Microdigital, Diagrama de Bloco TK 3000 Color
- ^ Manual TK 3000 //e (PDF) (in Brazilian Portuguese). São Paulo. May 1986. pp. I-5.
{{cite book}}: CS1 maint: location missing publisher (link)
