Commodore 128
Země / Country:
USA / United States
Rok / Year:
1985
Česky / Czech:
Commodore 128, USA, 1985. Poslední osmibitový domácí počítač Commodore spojuje tři provozní prostředí v jednom stroji. Nativní režim C128 používá MOS 8502 na 1 nebo 2 MHz, 128 KB RAM a BASIC 7.0. Režim C64 poskytuje velmi vysokou kompatibilitu s Commodorem 64 a pracuje na 1 MHz. Třetí režim používá Zilog Z80B a CP/M Plus 3.0. Z80 je čip určený pro 4 MHz, v C128 však kvůli sdílené sběrnici pracuje efektivně přibližně na 2 MHz. MMU MOS 8722 řídí mapování dvou 64KB RAM bank i volbu procesoru. Pro obraz jsou k dispozici dva samostatné čipy, VIC-IIe pro 40 sloupců, grafiku a sprity a VDC 8563 s 16 KB vlastní video RAM pro 80 × 25 znaků a 640 × 200. Zvuk obstarává SID. S mechanikou 1571 umí C128 výrazně rychlejší burst přenos.
English / Anglicky:
Commodore 128, USA, 1985. Commodore's final 8 bit home computer combines three operating environments in one machine. Native C128 mode uses a MOS 8502 at 1 or 2 MHz, 128 KB RAM and BASIC 7.0. C64 mode provides a very high degree of Commodore 64 compatibility and runs at 1 MHz. The third mode uses a Zilog Z80B with CP/M Plus 3.0. The Z80 is a 4 MHz-rated device but runs at an effective speed of about 2 MHz in the C128 because of shared bus timing. The MOS 8722 MMU manages the two 64 KB RAM banks and processor selection. Two separate video chips are provided, VIC-IIe for 40 column graphics and sprites, and the 8563 VDC with 16 KB dedicated video RAM for 80 × 25 text and 640 × 200 output. Sound is provided by the SID. With a 1571 drive the C128 can use a much faster serial burst mode.
Technické údaje / Specifications
Výrobce / Manufacturer: Commodore Business Machines
Model: Commodore 128
Rok / Year: 1985
Země / Country: USA / United States
Typ / Type: 8 bit home / personal computer with C128, C64 and CP/M modes
CPU: MOS 8502 + Zilog Z80B
Takt CPU / CPU clock: 8502: 1 or 2 MHz, Z80B: 4 MHz rated, effectively about 2 MHz in C128
RAM: 128 KB system RAM in two 64 KB banks + 16 KB VDC video RAM + colour RAM
ROM: 72 KB physical ROM set with BASIC 7.0, C128 KERNAL/editor, Z80 BIOS, C64 BASIC/KERNAL and character sets
Operační systém / Operating system: Commodore BASIC 7.0 and KERNAL (ROM), C64 BASIC 2.0 mode, CP/M optional
Video / Graphics: VIC-IIe 8564/8566 for 40 columns, 16 colours and 8 sprites, VDC 8563 with 16 KB VRAM for 80 × 25 and 640 × 200 RGBI output
Zvuk / Sound: MOS SID 6581, 3 programmable voices
Média / Storage: External IEC floppy drives including 1571 with burst mode, Datasette, cartridges, CP/M boot from disk
Rozhraní / Interfaces: IEC serial bus, cassette, cartridge/expansion port, user port, 2 joystick ports, 40 column A/V, 80 column RGBI, REU support
Napájení / Power: External C128 power supply
Rozměry / Dimensions: Approximately 432 × 349 × 51 mm (computer only)
Původní cena / Original price: About US$300 at launch in 1985
Zdroje / Sources
Commodore 128 System Guide, 1985
C128 System Guide, operating modes
Commodore 128/128D Service Manual archive
C64-Wiki, C128 ROM and hardware details
Computer History Museum, Commodore C128 object measurements 43.18 × 34.92 × 5.08 cm
