Tulack / JFF

JFF Computer

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:

• Artemisa Computer System
• Omega Home Computer
• SRAM Replacement for TMS99x8 VRAM by Tom LeMense

YouTube Video - Testing revision 1.0