GfxV9990
About the GfxV9990 PCB
GfxV9990 is an open source PCB design by ddraig68k, published on GitHub under the MIT license. It is a 4-layer board measuring 100 × 100 mm, with 70 components from 37 distinct parts.
Other key parts include the 74LS125, XC9536PC44, 74HCT04, CXA2075M and V9990. By type, the board carries 26 capacitors, 24 resistors, 7 ICs, 6 connectors, 3 crystals and 2 inductors.
From the project
Schematic and CAD files for my 68K based computer
The V9990 was intended as a successor to the V9958 (or supposedly a stripped down version of the never finished Yamaha V9978), but while the other chips in the range had backwards compatibility with the previous generation, the V9990 has some similar functionality but lacks the backwards compatibility.
Still, the V9990 has impressive specifications for the time, some of the features include:
Main components on the GfxV9990
GfxV9990 bill of materials (BOM)
70 components, 37 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 74LS125 | SO-14_3.9x8.65mm_P1.27mm | U1 |
| 1 | XC9536PC44 | PLCC-44 | U2 |
| 1 | 74HCT04 | SO-14_3.9x8.65mm_P1.27mm | U3 |
| 1 | CXA2075M | SOP-24_7.5x15.4mm_P1.27mm | U4 |
| 1 | V9990 | QFP-128_28x28_Pitch0.8mm | U5 |
| 2 | KM428C256 | SOIC-40 | U6, U7 |
| 1 | BC817 | SOT-23 | Q1 |
| 1 | 14.314Mhz | Oscillator_DIP-8 | X1 |
| 1 | 4.4336161875Mhz | Crystal_HC50_Vertical | Y1 |
| 1 | 21.47727Mhz | Crystal_HC50_Vertical | Y2 |
| 1 | D68K_64PIN_BOARD | DIN41612_C_2x32_Male_Horizontal_THT | J1 |
| 1 | JTAG | PinHeader_1x06_P2.54mm_Vertical | J2 |
| 1 | S-Video | MINI-DIN-4-TE_5749181-1 | J3 |
| 1 | Composite | KLPX0848A2RG | J4 |
| 1 | RGB Video | MINI-DIN-8-TE_57492681 | J5 |
| 1 | Audio In | SWITCHCRAFT_35RAPC2BHN2 | J6 |
| 1 | Amber | LED_1206_3216Metric | D1 |
| 2 | 4.7uH | L_1206_3216Metric | L1, L2 |
| 12 | 100nF | C_0805_2012Metric | C1, C2, C3, C6, C7, C8, C18, C22 +4 |
| 2 | 22pF | C_0805_2012Metric | C4, C5 |
Show 17 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 47pF | C_0805_2012Metric | C9 |
| 1 | 5pF | C_0805_2012Metric | C10 |
| 7 | 220uF | CP_Radial_D5.0mm_P2.50mm | C11, C12, C13, C14, C15, C16, C17 |
| 1 | 47uF | CP_Radial_D5.0mm_P2.50mm | C19 |
| 2 | 27pF | C_0805_2012Metric | C20, C21 |
| 2 | 220R | LED_0805_2012Metric | R1, R18 |
| 3 | 470R | LED_0805_2012Metric | R2, R4, R5 |
| 1 | 4M7 | LED_0805_2012Metric | R3 |
| 2 | 2K2 | LED_0805_2012Metric | R6, R7 |
| 1 | 2K61 | LED_0805_2012Metric | R8 |
| 5 | 75R | LED_0805_2012Metric | R9, R10, R11, R13, R14 |
| 1 | 43R | LED_0805_2012Metric | R12 |
| 1 | 240R | LED_0805_2012Metric | R15 |
| 1 | 1K | LED_0805_2012Metric | R16 |
| 1 | 100R | LED_0805_2012Metric | R17 |
| 1 | 10M | LED_0805_2012Metric | R19 |
| 5 | 4K7 | LED_0805_2012Metric | R20, R21, R22, R23, R24 |
GfxV9990 design files
The KiCad project lives in the ddraig68k/hardware repository on GitHub; these links point at the commit this page was built from.
GfxV9990: common questions
How big is the GfxV9990 PCB?
The GfxV9990 measures 100 × 100 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the GfxV9990?
70 components, from 37 distinct parts. The full bill of materials is listed on this page.
Where can I download the GfxV9990 design files?
From the ddraig68k/hardware repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the GfxV9990 design in my own project?
Yes, under the terms of its MIT license, which ddraig68k chose for the repository.
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Earlier revisions in the repo: GfxV9958