642 GUS16 CPU

642 : GUS16 CPU

Design render

How it works

This project includes a 16-bit experimental CPU (GUS16) with a serial port and a few more peripherals (see GUS16_tt.pdf). Memory has to be provided externally. An included bootloader allows the execution of programs loaded through the serial port.

How to test

Connect a serial port 8-bit, no parity, 115200 bps, and send an 'L'. The bootloader code should reply with another 'L'. For more complete tests an external board with SRAM memory and address latches has to be attached to the PMOD ports of the prototype board.

External hardware

A memory board has to be attached to user PMOD connectors (still pending design)

More docs

https://www.ele.uva.es/~jesus/cpu_v2.pdf (older designs, spanish)

https://www.ele.uva.es/~jesus/GUS16v6.pdf (current CPU version)

https://www.ele.uva.es/~jesus/a2.pdf (CPU usage in a floppy disk emulator for apple-IIs in FPGAs)

IO

#InputOutputBidirectional
0gpi[0]xbhxd[0]
1gpi[1]xlalxd[1]
2gpi[2]xlalxd[2]
3rxdpwmoutxd[3]
4gpi[3]txdxd[4]
5gpi[4]gpoxd[5]
6gpi[5]xoebxd[6]
7gpi[6]xwebxd[7]

Chip location

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Sound Generator AY-3-8913) tt_um_tommythorn_cgates (Cgates) tt_um_09eksdee (eksdee) tt_um_rejunity_decoder (ternary, E1M0, E2M0 decoders) tt_um_kailinsley (Dynamic Threshold Leaky Integrate-and-Fire) tt_um_rejunity_vga_test01 (VGA Drop (audio/visual demo)) tt_um_wallento_4bit_toycpu (4-Bit Toy CPU) tt_um_warp (Warp) tt_um_algofoogle_tt09_ring_osc3 (Verilog ring oscillator V3) tt_um_kev_ma_matmult222 (2-bit 2x2 Matrix Multiplier) tt_um_rejunity_vga_logo (VGA Tiny Logo (1 tile)) tt_um_liaf (A simple leaky integrate and fire neuron) tt_um_lif_network_MR (Leaky Neuron Network) tt_um_lsnn_hschweig (Neuromorphic Hardware for SNN LSTM) tt_um_Nishanth_RISCV (RISCV Processor Design) tt_um_KoushikCSN_RISCV (RISCV Processor Design) tt_um_ccu_goatgate (tiny cipher 4 bit key) tt_um_lif_ZB (Tutorial: Simple LIF Neuron) tt_um_z2a_rgb_mixer (RGB Mixer demo) tt_um_vga_clock (VGA clock) tt_um_synth_simple_mm (synth_simple) tt_um_gus16 (GUS16 CPU) tt_um_rejunity_ternary_dot (Ternary 128-element Dot Product) tt_um_virantha_enigma (Enigma - 52-bit Key Length) tt_um_atomNPU (AtomNPU) tt_um_alphaonesoc (AlphaOneSoC) tt_um_gxrii_spi_sevenseg (SPI 7-segment display) tt_um_urish_simon (Simon Says memory game) tt_um_branch_pred (TinyTapeout Minimal Branch Predictor) tt_um_xor_encryption (Xor-Logic) tt_um_MAC_Accelerator_OnSachinSharma (MAC Operation) tt_um_moody_mimosa (Moody-mimosa) tt_um_wrapper (6Digit7SegClock) tt_um_MichaelBell_tinyQV (TinyQV Risc-V SoC) tt_um_devmonk_ay8913 (Classic 8-bit era Programmable Sound Generator AY-3-8913) tt_um_toivoh_demo_tt10 (Orion Iron Ion [TT08 demo competition]) tt_um_2048_vga_game (2048 sliding tile puzzle game (VGA)) tt_um_gamepad_pmod_demo (Gamepad Pmod Demo) tt_um_tinytapeout_logo_screensaver (VGA Screensaver with Tiny Tapeout Logo) tt_um_mattvenn_spi_test (SPI test) tt_um_huffman_coder (Huffmann_Coder) tt_um_multiplier_tt10 (Vedic multiplier) tt_um_schoeberl_wildcat (Wildcat RISC-V) tt_um_kentrane_tinyspectrum (Tiny piano) tt_um_i2c_regf 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