K1839

Chipset

• L1839VM1 — The central processor.
• * The VAX-11 instruction set includes 304 instructions, 21 addressing modes, 8/16/32/64 bits of data, 32 bit machine word, 16 GPRs and hardware support for multitasking and virtual memory. Virtual addressing is 32-bit, the physical address bus is 24 bits wide and the data bus is 32 bits wide.
• * Frequency 10 MHz and consisted of 150,000 transistors. Register/register addition takes 2 cycles or 0.2 μs, and memory access 0.6 μs.
• L1839VM2 – Arithmetic and Floating point coprocessor.
• * 252 instructions, 8/16/32/64 bits integers, floating point F / D / G formats, and 24 bit addressing.
• * Frequency 10 MHz. Integer multiply 0.8μs, floating point multiply 1.5μs.
• L1839VT1 – DRAM and cache controller.
• * Supports 256 kBit and 1 Mbit DRAMs.
• * Frequency 10 MHz. DRAM word access time 800ns, cache access time of 200ns.
• L1839VT2 – SRAM controller
• * Supports 8/16/32 bit data words and 24 bit addresses.
• * Frequency 10 MHz. 200-400ns memory access time, parity or Hamming error correction.
• L1839VV1 – 32-bit/Q-bus host adaptor and interrupt controller.
• * Q-bus 8/16 bit accesses, 18 bit addresses
• * 32-bus 8/16/32 bit accesses, 24 bit addresses
• * 18 vector interrupts, and 4 interrupt priority levels.
• * Frequency 10 MHz.
• N1839RE1A/B – Microprogram ROM
• * 16kW 32-bit word mask ROM.
• * Frequency 10 MHz. Access time 180ns.
• N1839VZh2 – 8-bit majority gate
• * The majority bi-directional inputs with bit-wise control and diagnostics
• * 20ns cycle time.