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jff's Introduction

JFF Computer

Just for Fun MSX 1 compatible computer.

This project was created Just for Fun. The goal was to build as simple as possible but fully functional MSX 1 compatible computer.

Specification:

  • Processor: Z80 CPU
  • Memory: 64KB in SLOT3
  • Video: TMS9918A - NTSC 60Hz - Composite video output
  • Audio: AY-3-8910 or YM2149F
  • Two cartridge slots
  • Two joysticks ports
  • Casette port

Compatible static RAM:

U15 - RAM

  • HM628128BLP-7 (Hitachi)
  • UM621024C-70LL (UMC Corporation)
  • D431000-70LL (NEC)

U7 - Video RAM

  • HM62256ALP-10 (Hitachi)
  • BS62LV256PCP70 (BSI Brilliance Semiconductor)
  • UT62256CPC-70L (Utron)

PPI 8255

  • D8255AC-2 (NEC)
  • CP82C55A-5 (INTERSIL)

PSG

  • AY-3-8910 (General Instrument)
  • YM2149F (Yamaha)
  • WF19054 (Winbond)
  • 95101 (JFC)
  • KC89C72 (File)
  • T7766A (Toshiba)

Keyboard

Details about Keyboard

PSU

Use a good quality 5V 2A power supply.

Revision 1.1 has been built and tested.

Some ideas were taken from the projects:

JFF Mainboard JFF Keyboard JFF Memtest

YouTube Video - Testing revision 1.0

YouTube link

jff's People

Contributors

konkotgit avatar

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