4 layers165 × 142.5 mm Testboard, the printed circuit board in 3D

Testboard

A general purpose computer platform for retrocomputing enthusiasts

Size: 165 × 142.5 mm
Copper layers: 4
Thickness: 1.6 mm
Parts: 175
Nets: 364
Pads: 1,296
Tracks, vias: 4,830, 525
Pours: 3
Routed: Yes
KiCad: KiCad 8.0 (file 20240108)
Created: 22 Aug 2023
Updated: 23 Sep 2026

Overview

Testboard is an open-source printed circuit board by anthonydotmoe, from the anthonydotmoe/68040pc repository on GitHub. It is a 4-layer board of 165 × 142.5 mm with 175 parts on 364 nets, routed with 4,830 tracks and 525 vias.

It is built around the ICE40HX4K-TQ144, MAX232N and SN74LVC07AD, with the SN74ALVC164245DL, IS61C5128AS-25TLI and 74AHCT04D among its other parts. Its parts include 89 capacitors, 36 resistors, 27 ICs, 5 crystals and 4 diodes. It belongs with the retro computing and games and fPGA and programmable logic boards and the FPGA and CPLD boards of this library.

Main components

README

hardware/testboard/README.md

Errata

MC68150's TA line is not open-collector! Another 74LVC1G08 AND gate should be used to connect FPGA TA and MC68150 TA to the CPU's TA.
U802A schematic pin markings are incorrect. At the FPGA, the following changes need to be made:
- LV_SIZ1 -> R/W
- LV_SIZ0 -> LV_SIZ0
- R/W -> LV_SIZ1

Parts

175

Qty	Value	Footprint	References
51	100nF	Capacitor_SMD:C_0603_1608Metric	C207, C301, C302, C401, C402, C510, C601, C801, C802, C803, C804, C805, C806, C807, C808, C810 +35
15	4.7k	Resistor_SMD:R_0603_1608Metric	R201, R202, R203, R204, R205, R206, R207, R208, R209, R210, R211, R212, R213, R214, R215
11	4.7uF	Capacitor_SMD:C_0603_1608Metric	C1, C702, C809, C812, C815, C821, C835, C839, C842, C847, C849
10	1uF	Capacitor_SMD:C_0805_2012Metric	C501, C502, C505, C506, C507, C508, C509, C512, C513, C514
6	10k	Resistor_SMD:R_0603_1608Metric	R1, R2, R4, R5, R805, R806
6	1k	Resistor_SMD:R_0603_1608Metric	R501, R601, R602, R802, R901, R902
5	SN74ALVC164245	Package_SO:TSSOP-48_6.1x12.5mm_P0.5mm	U802, U804, U805, U806, U807
3	BLM18HE152SN1D	Inductor_SMD:L_0603_1608Metric	FB801, FB802, FB803
3	MountingHole	MountingHole:MountingHole_3.2mm_M3	H1, H2, H3
2	0.22uF	Capacitor_SMD:C_0603_1608Metric	C201, C204
2	10K	Resistor_SMD:R_0603_1608Metric	R803, R804
2	10nF	Capacitor_SMD:C_0603_1608Metric	C2, C3
2	15pF	Capacitor_SMD:C_0603_1608Metric	C503, C504
2	2.2K	Resistor_SMD:R_0603_1608Metric	R801, R809
2	220pF	Capacitor_SMD:C_0603_1608Metric	C203, C206
2	22uF	Capacitor_Tantalum_SMD:CP_EIA-2012-15_AVX-P	C704, C706
2	22uF	Capacitor_THT:CP_Radial_D5.0mm_P2.00mm	C202, C205
2	27pF	Capacitor_SMD:C_0603_1608Metric	C4, C5
2	DE9_Plug_MountingHoles	Connector_Dsub:DSUB-9_Male_Horizontal_P2.77x2.84mm_EdgePinOffset4.94mm_Housed_MountingHolesOffset7.48mm	JS501, JS502
2	IS61C5128AS-25TLI	Package_SO:TSOP-II-32_21.0x10.2mm_P1.27mm	U301, U302
2	MAX232	Package_SO:SOIC-16_3.9x9.9mm_P1.27mm	U501, U503
2	PGB1010603	Diode_SMD:D_0603_1608Metric	D1, D2
2	SN74LVC07	Package_SO:TSSOP-14_4.4x5mm_P0.65mm	U808, U810
1	100	Resistor_SMD:R_0603_1608Metric	R808
1	10uF	Capacitor_Tantalum_SMD:CP_EIA-2012-12_Kemet-R	C707
1	12MHz	Crystal:Crystal_SMD_Abracon_ABM8G-4Pin_3.2x2.5mm	Y1
1	12k	Resistor_SMD:R_0603_1608Metric	R810
1	1k	Resistor_THT:R_Array_SIP10	RN201
1	220uF	Capacitor_THT:CP_Radial_D8.0mm_P2.50mm	C705
1	2k	Resistor_SMD:R_0603_1608Metric	R6
1	3.6864MHz	Crystal:Crystal_C38-LF_D3.0mm_L8.0mm_Vertical	Y501
1	33MHz	Oscillator:Oscillator_DIP-8	X403
1	33MHz	Oscillator:Oscillator_DIP-14	X402
1	39k	Resistor_SMD:R_0603_1608Metric	R3
1	68681	Package_DIP:DIP-40_W15.24mm	U502
1	68LC040	68040:PGA179	U201
1	74AHCT04	Package_SO:TSSOP-14_4.4x5mm_P0.65mm	U809
1	74LVC1G04	Package_TO_SOT_SMD:SOT-23-5	U202
1	74LVC1G08	Package_TO_SOT_SMD:SOT-23-5	U902
1	93LCxxBxxOT	Package_TO_SOT_SMD:SOT-23-6	U3
1	AP2112K-1.2	Package_TO_SOT_SMD:SOT-23-5	U702
1	ASE-33MHz	Oscillator:Oscillator_SMD_Abracon_ASE-4Pin_3.2x2.5mm	X401
1	BUTTON	Button_Switch_THT:SW_PUSH_6mm	SW801
1	Barrel_Jack	Connector_BarrelJack:BarrelJack_GCT_DCJ200-10-A_Horizontal	J701
1	C_Polarized_Small_US	Capacitor_THT:CP_Radial_D5.0mm_P2.00mm	C511
1	FT232H	Package_DFN_QFN:QFN-48-1EP_8x8mm_P0.5mm_EP6.2x6.2mm	U811
1	FerriteBead	Inductor_SMD:L_0805_2012Metric_Pad1.15x1.40mm_HandSolder	FB201
1	ICE40HX4K-TQ144	Package_QFP:TQFP-144_20x20mm_P0.5mm	U803
1	LED	LED_THT:LED_D3.0mm	D803
1	LT1084-3.3	Package_TO_SOT_SMD:TO-263-3_TabPin2	U703
1	LTST-C191KGKT	LED_SMD:LED_0603_1608Metric	D801
1	MAX98306 Amp	68040:AMP	U2
1	NB3N502	Package_SO:SOIC-8_3.9x4.9mm_P1.27mm	U401
1	RESET	Button_Switch_THT:SW_PUSH_6mm	SW901
1	R_Small_US	Resistor_SMD:R_0603_1608Metric	R807
1	SST26VF023BA	Package_SO:SOP-8_5.28x5.23mm_P1.27mm	U801
1	TL7705A	Package_SO:SOIC-8_3.9x4.9mm_P1.27mm	U901
1	USB_B_Micro	Connector_USB:USB_Micro-B_Amphenol_10118193-0001LF_Horizontal	J802
1	~	68040:DACMOD	U1
1	~	Package_LCC:PLCC-68_THT-Socket	U601

Questions

How big is the Testboard PCB?

It measures 165 × 142.5 mm and has 4 copper layers, 1.6 mm thick.

What parts does the Testboard use?

175 parts, built around the ICE40HX4K-TQ144, MAX232N, SN74LVC07AD and SN74ALVC164245DL. 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 Testboard KiCad files?

From the anthonydotmoe/68040pc repository on GitHub, at the commit this page was made from: the board is hardware/testboard/testboard.kicad_pcb and its schematic hardware/motherboard/68040pc.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the Testboard design in my own project?

Its repository states no licence, so its author keeps all rights: ask anthonydotmoe before reusing the design.

Category and platform

Retro computing and games FPGA and programmable logic FPGA and CPLD

Topics

68040 68k computer-engineering fpga retrocomputing

Project files

Show this board on your page

A live frame, for any web page

<iframe src="https://pcbkit.io/embed/boards/anthonydotmoe-68040pc-testboard" title="Testboard in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe>

A picture

<img src="https://pcbkit.io/embed/boards/anthonydotmoe-68040pc-testboard.jpg" alt="Testboard" width="1200" height="900">

A picture that opens the board, for a README

[![Testboard](https://pcbkit.io/embed/boards/anthonydotmoe-68040pc-testboard.jpg?size=s)](https://pcbkit.io/boards/anthonydotmoe-68040pc-testboard)

Source

Repository: anthonydotmoe/68040pc
Board file: hardware/testboard/testboard.kicad_pcb
Commit: e03936d
Licence: Not stated

Similar boards

4 layers64 × 88.6 mm
SF500
jbilander/SF500
Spitfire 500, A low-end 14 MHz Accelerator with IDE and 4/8 MB fast RAM for the Amiga 500.
52 parts82CC-BY-SA-4.0
4 layers98.8 × 100.1 mm
Main v2
svpetry/Mini8086
A small 8086 computer system.
69 parts3
2 layers39 × 33.3 mm
Coco2 3134 64k static ram board
qbancoffee/coco2_64k_sram
Static RAM board for the Tandy Color Computer 2 model 26-3134
9 parts7GPL-3.0
4 layers304.5 × 217.2 mm
Latest Full Backplane
Trilobyte-CPU/8-bit-computer
A DIY 8-bit computer built mostly with discrete logic chips
478 parts2
4 layers101.2 × 63.5 mm
FABulous board
FPGA-Research/FABulous_board
A PCB created for FABulous FPGAs, based on the caravel board.
85 parts6Apache-2.0
2 layers35.6 × 45.9 mm
BreakoutBoards02
joeferner/breakoutBoards
Collection of break out boards
47 parts2
4 layers227.5 × 183 mm
FT232H Board
mmaatthieuu/Wormstation
The Wormstation Project: A fully open-source, all-in-one platform designed for ease of use and accessibility, while offering powerful, highly automated solutions for laboratory-grade biological research.
364 parts1MIT
4 layers130 × 90 mm
Dual adc usb
devbisme/ai-circuit-design-tests
Tests of KiCad-related AI tools.
197 parts10