My first chip (emulation project)
By cTrix on June 26, 2016 6:44 pm
This is what I worked on this week. To most ears it probably sounds abysmal!
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Basically I designed and spec'ed an audio chip down to silicon level, designed the surrounding electronics around it, then wrote an emulator to hear what it would sound like. Built my own DAC in software with biasing - simulated caps and everything, etc. Then wrote an ADC emulator to convert voltage outputs back to 48khz wave file!
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My rules were 16 pins... parallel data input... internal latches in chip design. Chip runs on 5 volts. DC biasing and voltage step down included. Blah blah.
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This is zero about the music and 100% about the project. Random fact - the chip is based around the pentatonic scale and the chip is clocked at 2.5khz (clock divided from main processor speed).... a huge mistake... so everything pitch wise is increments of 2.5ms. I didn't emulate the computer (Z80 based machine) that I'd designed to run the play routine! But I did program a memory map for the system.... then revised the chip with a proper addressing bus.
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Audio works licensed by author under:
CC Attribution Noncommercial No Derivative Works (BY-NC-ND)
