HardLabs

M8SBC-486

maniekx86·M8SBC-486·pcb/homebrew_486.kicad_pcb

M8SBC-486 PCB layout, top view — open source AVR/Arduino board by maniekx86
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About the M8SBC-486 PCB

M8SBC-486 is an open source AVR/Arduino PCB design by maniekx86, published on GitHub. It is a 4-layer board measuring 150 × 150 mm, with 123 components from 48 distinct parts.

Its main chip is the ATmega128L-8A, from the AVR/Arduino family. Other key parts include the 486Socket, XC2S100TQ144, AMS1117, 74LS245 and 8254. By type, the board carries 42 capacitors, 29 resistors, 23 ICs, 22 connectors, 3 crystals and 2 switches.

It belongs with the retro computing designs in this gallery.

From the project

All the sources (Schematics, PCB, VHDL, BIOS sources) for the M8SBC-486. This project is a 486 Homebrew computer, with some efforts to make it kinda PC compatible

M8SBC-486 KiCad 9.0 schematic. Current revision: 1.01

Used fonts: Ac437 IBM VGA 8x16 and URW Gothic

- 486 Socket symbol & footprint: ciprian-stingu/KiCad-486-CPU-socket - Mini DIN-6 connector with shielding footprint: 4x1md/kicad_libraries - 16-bit ISA slot footprint: the retro web / Aries-1 - PCBWay for manufacturing boards!

Main components on the M8SBC-486

486SocketXC2S100TQ144AMS111774LS24582548259A-2HM628512W29C020ATmega128L-8A74LS573

M8SBC-486 bill of materials (BOM)

123 components, 48 distinct parts.

QtyPartRefs
1
486Socket
U1
1
XC2S100TQ144
U2
2
AMS1117
U3, U4
6
74LS245
U5, U6, U7, U8, U19, U20
1
8254
U9
1
8259A-2
U10
8
HM628512
U11, U12, U13, U14, U15, U16, U17, U18
1
W29C020
U21
1
ATmega128L-8A
U22
1
74LS573
U23
1
TXC-7C
Y1
1
GTXO-14T
Y2
1
16MHz
Y3
2
Bus_ISA_16bit
J1, J2
1
ATX-20
J3
1
AVR ISP
J4
1
FPGA JTAG
J5
1
Enable load
J6
1
RAM cacheable
J7
1
ROM cacheable
J8
Show 28 more
QtyPartRefs
1
CLKMUL SET
J9
1
ISA_DEBUG
J10
1
PEN
J11
1
MEM_WR_RD_J
J12
1
KB
J13
1
ATMegaSpare
J14
1
PC SPK
J15
1
ATUART
J16
1
IOout
J17
1
Reset ext
J18
4
Conn_01x02_Pin
J19, J20, J21, J22
1
SW_SPDT
SW1
1
Reset btn
SW2
1
PWR_LED
D1
1
D7_LED
D2
2
22u
C1, C2
34
0.1u
C3, C4, C7, C8, C9, C10, C11, C12 +26
2
22p
C5, C6
4
10u
C36, C37, C38, C39
4
4.7K
R1, R2, R3, R4
3
120
R5, R6, R7
1
200
R8
6
10K
R9, R11, R12, R13, R27, R28
1
33
R10
10
1K
R14, R15, R16, R19, R20, R21, R22, R23 +2
2
300
R17, R18
1
100
R26
1
10
R29

M8SBC-486 design files

The KiCad project lives in the maniekx86/M8SBC-486 repository on GitHub; these links point at the commit this page was built from.

M8SBC-486: common questions

What microcontroller does the M8SBC-486 use?

The M8SBC-486 is built around the ATmega128L-8A, from the AVR/Arduino family.

How big is the M8SBC-486 PCB?

The M8SBC-486 measures 150 × 150 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the M8SBC-486?

123 components, from 48 distinct parts. The full bill of materials is listed on this page.

Where can I download the M8SBC-486 design files?

From the maniekx86/M8SBC-486 repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the M8SBC-486 design in my own project?

The repository has no license, so all rights stay with maniekx86. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the M8SBC-486 without the hardware?

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

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