Last visit was: Wed May 22, 2024 6:33 pm
It is currently Wed May 22, 2024 6:33 pm

 [ 1 post ] 
 Novasaur - Retrocomputer, late-70's TTL logic, no MPU 
Author Message

Joined: Wed Jan 09, 2013 6:54 pm
Posts: 1786
Not entirely unlike the Gigatron, but with lots of RAM and ROM and able to run CP/M (by emulating an 8080). Uses ROM for the ALU function.
The Novasaur is a full-featured personal computer built from less than three dozen Advanced Schottky TTL chips (circa 1979). It supports an 80-column SVGA text display, PS/2 keyboard, programmable sound generator, RS232 serial, and an Intel 8080 byte-code interpreter. The machine is capable of running early 80's computer games and CP/M using a built-in 254k RAM disk. ... rocomputer
    Dual Processor CPU/GPU (Harvard Architecture).
    33 MHz dot clock, 16.5 MHz data path, 8.25 MHz per processor (~3.5 CPU MIPs)
    256k ROM: 96k ALU, 64k native program, 64k cold storage, 32k fonts.
    512k RAM: 7 banks of 64k user, 60k display, 4k system.
    76 ALU functions including multiply/divide, system, and math functions.
    Bitmapped Graphics: Hi-res mode up to 416x240 with 8 colors and 4 dithering patterns. Lo-res mode up to 208x160 with 256 colors, double buffered.
    Text Mode: 8 colors FG/BG, 256 line buffer, up to 104x60 using 8x8 glyphs, 80x36 and 64x48 rows using 8x16 glyphs.
    Audio: 4 voice wavetable synthesis, ADSR, 8-bit DAC, 8Hz-4.8kHz.
    PS2 Keyboard: Native interface built in.
    RS232 Serial Port: Full duplex, RTS/CTS flow control, 9600 baud.
    Expansion Port: 7 addressable 8-bit register ports, 4 interrupt flags
    Chip Count: 34 TTL (22 CPU, 12 GPU), 1 ROM, 1 RAM, 1 PAL, 4 analog.
    Gate Count: 1,425 (935 CPU, 490 GPU)
    PCB size: 8" x 5" (200 x 125mm) double-sided board.
    Power: 6v @ 1.6A (10W)

Presentation as Google doc - (2023 VCF East)

Might yet be a kit for sale - keep an eye on

Fri Apr 14, 2023 8:37 pm
 [ 1 post ] 

Who is online

Users browsing this forum: CCBot and 1 guest

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Jump to:  
Powered by phpBB® Forum Software © phpBB Group
Designed by ST Software