Commodore pet clone

DLehenbauer·commodore-pet-clone·hw/Mainboard/Mainboard.kicad_pcb

About the Commodore pet clone PCB

Commodore pet clone is an open source RP2040/RP2350 PCB design by DLehenbauer, published on GitHub under the CC0-1.0 license. It is a 2-layer board measuring 262.5 × 108 mm, with 258 components from 107 distinct parts.

Its main chip is the RP2040, from the RP2040/RP2350 family. Other key parts include the 74LS145, SN74LS07, 74LS245, W65C21N and W65C22N. By type, the board carries 89 resistors, 84 capacitors, 27 connectors, 22 ICs, 14 diodes and 10 jumpers.

It belongs with the retro computing designs in this gallery.

From the project

Open hardware clone of the Commodore PET 4032

Note: The latest information on this project is here.

Open hardware clone of the Commodore CBM/PET using modern parts. Some assembly required. :-)

Working prototype. PCB and SMT manufacturing files are here.

This open hardware CBM/PET clone can be used in two ways:

1. By itself with an HDMI display and USB keyboard 2. As a mainboard replacement to repair/enhance a vintage CBM/PET

Commodore pet clone, from the project README — From the project README

Main components on the Commodore pet clone

74LS145 SN74LS07 74LS245 W65C21N W65C22N LM317AG-TN3-R W65C02S AS6C1008 AMS1117-3.3 RP2040 W25Q128JVS SN74LVC4245APWR T8Q144C3 LM386

Commodore pet clone bill of materials (BOM)

258 components, 107 distinct parts — part numbers from the project's BOM.

Qty	Part	Footprint	Refs
1	74LS145	SOIC-16_3.9x9.9mm_P1.27mm	U1
3	SN74LS07	SOIC-14_3.9x8.7mm_P1.27mm	U2, U3, U4
2	74LS245	SOIC-20W_7.5x12.8mm_P1.27mm	U5, U6
2	W65C21N	DIP-40_W15.24mm_Socket	U7, U8
1	W65C22N	DIP-40_W15.24mm_Socket	U9
2	LM317AG-TN3-R	TO-252-2_ThermalVias	U10, U15
1	W65C02S	DIP-40_W15.24mm_Socket	U11
1	AS6C1008	DIP-32_W15.24mm_Socket	U12
1	AMS1117-3.3	SOT-223-3_TabPin2	U13
1	RP2040	LQFN-56_L7.0-W7.0-P0.4-EP	U14
1	W25Q128JVS	SOIC-8_5.23x5.23mm_P1.27mm	U16
1	LM317AG-TN3-R	TO-252-2	U17
3	SN74LVC4245APWR	TSSOP-24_4.4x7.8mm_P0.65mm	U18, U19, U20
1	T8Q144C3	QFP50P2200X2200X160-144N	U21
1	LM386	DIP-8_W7.62mm	U22
2	AO3401A	SOT-23_L2.9-W1.3-P1.90-LS2.4-BR	Q1, Q3
1	MMBT3904	SOT-23	Q4
1	C9002 12 MHz	Crystal_SMD_3225-4Pin_3.2x2.5mm	Y1
1	SJ-43504-SMT SJ-43504-SMT-TR	CUI_SJ-43504-SMT-TR	J1
1	2-826646-0 KEYBOARD	CBM_PET_KEYBOARD_KEYED_20P	J2

Show 87 more

Qty	Part	Footprint	Refs
1	IEEE	CBM_PET_IEEE_EDGE_CON_24P	J3
1	USER	CBM_PET_USER_EDGE_CON_24P	J4
1	CASS A	CBM_PET_CASS_EDGE_CON_12P	J5
1	CASS B	CBM_PET_CASS_EDGE_CON_12P	J6
1	CON-SOCJ-2155 9V POWER	BarrelJack_Horizontal	J7
1	FLASH	PinHeader_1x02_P2.54mm_Vertical	J8
1	VIDEO	PET_Video	J9
2	5V PWR	PinHeader_2x03_P2.54mm_Vertical	J10, J20
1	9V POWER	PinHeader_1x02_P2.54mm_Vertical	J11
1	C138388 NOT_HDMI_A	HDMI_A_Molex_208658-1001_Horizontal	J12
1	C393941 MicroSD	TF-SMD_TF-PUSH	J13
1	USB2.0_HOST_TYPE_C	USB-C_SMD-TYPE-C-31-M-12	J14
1	KEYBOARD_EX	PinHeader_2x08_P2.54mm_Vertical	J15
1	FPGA_MCU	PinHeader_2x11_P2.54mm_Vertical	J16
1	PET POWER	PET_POWER_Molex_KK-396_A-41791-0009_1x09_P3.96mm_Vertical	J18
1	PROG	IDC-Header_2x08_P2.54mm_Vertical	J19
1	929975-01-14 FPGA_P3	PinHeader_2x14_P2.54mm_Vertical	J21
1	MENU	PinHeader_1x02_P2.54mm_Vertical	J22
1	929975-01-14 FPGA_P2	PinHeader_2x14_P2.54mm_Vertical	J23
1	CONN_02X15_ODD_EVEN FPGA_P1	PinHeader_2x15_P2.54mm_Vertical	J24
1	IEEE_HEADER	PinHeader_2x09_P2.54mm_Vertical	J25
1	USER_HEADER	PinHeader_2x11_P2.54mm_Vertical	J26
1	CASS_A_HEADER	PinHeader_1x06_P2.54mm_Vertical	J27
1	CASS_B_HEADER	PinHeader_1x06_P2.54mm_Vertical	J28
1	V-1100-SMD/B-L Heatsink_Pad	V1100SMDBL	HS1
1	CASS A ~{SWITCH}	SolderJumper-3_P1.3mm_Open_RoundedPad1.0x1.5mm	JP1
1	CASS B ~{SWITCH}	SolderJumper-3_P1.3mm_Open_RoundedPad1.0x1.5mm	JP2
1	CASS A READ	SolderJumper-3_P1.3mm_Open_RoundedPad1.0x1.5mm	JP3
1	CASS B READ	SolderJumper-3_P1.3mm_Open_RoundedPad1.0x1.5mm	JP4
1	CASS A ~{MOTOR}	SolderJumper-3_P1.3mm_Open_RoundedPad1.0x1.5mm	JP5
1	CASS B ~{MOTOR}	SolderJumper-3_P1.3mm_Open_RoundedPad1.0x1.5mm	JP6
1	DVI_CEC	SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm	JP7
1	DVI_SDA	SolderJumper-3_P1.3mm_Open_RoundedPad1.0x1.5mm	JP8
1	DVI_SCL	SolderJumper-3_P1.3mm_Open_RoundedPad1.0x1.5mm	JP9
1	VIDEO_OR_5V	SolderJumper-3_P1.3mm_Open_RoundedPad1.0x1.5mm	JP10
1	Speaker	AT1220TT9R	LS1
1	RESET	SW-TH_L6.0-W3.5-P6.50	SW1
1	RUN	SW-TH_L6.0-W3.5-P6.50	SW2
1	MENU	APEM_MJTP1117	SW3
1	NMI	SW-TH_L6.0-W3.5-P6.50	SW4
1	CONFIG	SW_DIP_SPSTx04_Slide_6.7x11.72mm_W7.62mm_P2.54mm_LowProfile	SW5
4	C2286 LED_RED	LED_0603_1608Metric	D1, D6, D7, D9
3	SS34	D_SMA	D2, D3, D4
5	SM4007	D_SOD-123F	D5, D11, D12, D13, D14
2	C72043 LED_GRN	LED_0603_1608Metric	D8, D10
1	C1002 600 200ma	L_0603_1608Metric	FB1
47	100N 100n	C_0402_1005Metric	C1, C2, C3, C4, C5, C6, C7, C8 +39
4	22N 22n	C_0402_1005Metric	C12, C15, C33, C59
8	1u	C_0402_1005Metric	C14, C29, C31, C32, C53, C60, C75, C83
7	10U 10u	C_0603_1608Metric	C16, C17, C24, C25, C70, C81, C82
2	22U 22u	C_0805_2012Metric	C21, C36
1	35YXJ470M10X16 470u	CP_Radial_D18.0mm_P5.00mm_P7.50mm	C35
3	C12530 2.2u 6.3V	C_0402_1005Metric	C37, C38, C52
2	30P 30p	C_0402_1005Metric	C47, C48
1	C15525 10u 6.3V	C_0402_1005Metric	C50
1	C96123 47u 10V	C_1206_3216Metric	C54
1	47N 47n	C_0603_1608Metric	C55
1	C23733 4.7u 10V	C_0402_1005Metric	C58
5	10N 10n	C_0402_1005Metric	C62, C65, C67, C69, C73
1	C19666 4.7u 16V	C_0603_1608Metric	C84
9	270	R_0603_1608Metric	R1, R2, R3, R4, R5, R6, R10, R11 +1
7	2K2 2k2	R_0402_1005Metric	R7, R8, R9, R64, R65, R73, R74
2	27	R_0603_1608Metric	R12, R15
2	470	R_0402_1005Metric	R13, R14
6	1k	R_0402_1005Metric	R17, R23, R26, R29, R31, R66
9	10K 10k	R_0402_1005Metric	R18, R20, R25, R27, R49, R52, R55, R56 +1
11	33	R_0402_1005Metric	R19, R21, R22, R48, R51, R63, R67, R68 +3
1	15K 15k	R_0402_1005Metric	R24
2	300	R_0402_1005Metric	R28, R47
2	100K 100k	R_0402_1005Metric	R30, R33
1	1.2K 1.2k	R_0402_1005Metric	R32
1	C25752 12k 1%	R_0402_1005Metric	R34
2	56K 56k	R_0402_1005Metric	R35, R36
1	3.9K 3.9k	R_0402_1005Metric	R37
4	4K7 4k7	R_0402_1005Metric	R38, R39, R40, R59
3	1K5 1k5	R_0402_1005Metric	R41, R44, R50
1	68	R_0805_2012Metric	R42
1	120	R_0402_1005Metric	R43
1	1.5K 1.5k	R_0402_1005Metric	R45
1	5.1K 5.1k	R_0402_1005Metric	R46
1	4K7 4k7	R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R53
3	5.6K 5.6k	R_0402_1005Metric	R54, R58, R60
1	10	R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R61
1	12K 12k	R_0805_2012Metric_Pad1.20x1.40mm_HandSolder	R72
4	4.7K 4.7k	R_Array_Convex_4x0603	RN1, RN3, RN5, RN7
9	10K 10k	R_Array_Convex_4x0603	RN2, RN4, RN6, RN8, RN9, RN10, RN14, RN15 +1
3	470	R_Array_Convex_4x0603	RN11, RN12, RN13

Commodore pet clone design files

The KiCad project lives in the DLehenbauer/commodore-pet-clone repository on GitHub; these links point at the commit this page was built from.

Layouthw/Mainboard/Mainboard.kicad_pcb
Schematichw/Mainboard/Mainboard.kicad_sch
BOMhw/Mainboard/production/bom.csv

Commodore pet clone: common questions

What microcontroller does the Commodore pet clone use?

The Commodore pet clone is built around the RP2040, from the RP2040/RP2350 family.

How big is the Commodore pet clone PCB?

The Commodore pet clone measures 262.5 × 108 mm, has 2 copper layers and is 0.57 mm thick.

How many components are on the Commodore pet clone?

258 components, from 107 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Commodore pet clone design files?

From the DLehenbauer/commodore-pet-clone repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Commodore pet clone design in my own project?

Yes, under the terms of its CC0-1.0 license, which DLehenbauer chose for the repository.

Can I test firmware for the Commodore pet clone without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.