2 layers83.3 × 65.3 mm
SimonShield
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46 parts14kMIT
2 layers73 × 80.6 mm
TMS2V
tergav17/TMS2VAdapts a V9938 VDP to work where a TMS9918 normally would
- Size
- 73 × 80.6 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 37
- Nets
- 99
- Pads
- 263
- Tracks, vias
- 784, 16
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 31 Jul 2024
- Updated
- 7 Aug 2024
Overview
TMS2V is an open-source printed circuit board by tergav17, from the tergav17/TMS2V repository on GitHub. It is a 2-layer board of 73 × 80.6 mm with 37 parts on 99 nets, routed with 784 tracks and 16 vias.
It is built around the BC547. Its parts include 12 resistors, 8 capacitors, 5 ICs, 4 transistors and 4 connectors.
Main components
1README
README.mdTMS2V
This project aims to allow a V9938 VDP to be installed in place of a TMS9918A. Since the V9938 is (largely) backwards compatible with the TMS9918A, existing software for upgraded systems should still function as normal. Besides interposing the 40-pin socket that the TMS9918A plugged into, an extra address line may be attacked to the bus to allow for addressing of the addition 2 ports found on the V9938.
Parts
37| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | 0.1 uF | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm | C1, C4, C5, C6, C7, C8 |
| 4 | 100R | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R2, R3, R4 |
| 4 | 1K | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R5, R6, R7, R8 |
| 4 | 220R | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R9, R10, R11, R12 |
| 4 | BC547 | Package_TO_SOT_THT:TO-92_Inline | Q1, Q2, Q3, Q4 |
| 4 | D41464 | Package_DIP:DIP-18_W7.62mm | U2, U3, U4, U5 |
| 2 | 10K | Resistor_THT:R_Array_SIP9 | RN1, RN2 |
| 1 | 24.47727 Mhz | Crystal:Crystal_HC49-U_Vertical | Y1 |
| 1 | 33 Pf | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm | C2 |
| 1 | 33 pF | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P5.00mm | C3 |
| 1 | RGB Header | Connector_PinHeader_2.54mm:PinHeader_1x05_P2.54mm_Vertical | J4 |
| 1 | RGB Out | Custom:DIN-6 | J3 |
| 1 | TMS9918A Socket | Connector_PinHeader_2.54mm:PinHeader_1x20_P2.54mm_Vertical | J1 |
| 1 | Tie Mode 1 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | JP1 |
| 1 | V9938 | Custom:DIP64 | U1 |
| 1 | ~ | Connector_PinHeader_2.54mm:PinHeader_1x20_P2.54mm_Vertical | J2 |
Questions
How big is the TMS2V PCB?
It measures 73 × 80.6 mm and has 2 copper layers, 1.6 mm thick.
What parts does the TMS2V use?
37 parts, built around the BC547. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the TMS2V KiCad files?
From the tergav17/TMS2V repository on GitHub, at the commit this page was made from: the board is TMS2V.kicad_pcb and its schematic TMS2V.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the TMS2V design in my own project?
Its repository states no licence, so its author keeps all rights: ask tergav17 before reusing the design.
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