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CatspersCoffee·S100-Boards·Z80-CPU/v2/board.kicad_pcb

Board layout, top view — open source board by CatspersCoffee

About the Board

Board is an open source PCB design by CatspersCoffee, published on GitHub under the Custom license license. It is a board measuring 254 × 134.6 mm, with 163 components from 52 distinct parts.

Other key parts include the Z80, 74LS373, 74LS153, 74LS157 and 74LS32. By type, the board carries 48 capacitors, 46 ICs, 21 resistors, 10 connectors, 7 transistors and 7 diodes.

It belongs with the retro computing designs in this gallery.

From the project

S-100 bus boards designed and built: Z80 and 80386 CPU cards, SRAM/DRAM memory, CPLD/FPGA I/O and SPI boards, an 18-slot backplane and bus terminator. KiCad designs with Xilinx XC9500 CPLD and Spartan-6 FPGA logic, with the original design history replayed in git.

An S-100 bus-master CPU card built around a Zilog Z80, in four revisions (silkscreen REV 1.0 to REV 5.0), 2014–2016. From REV 4.0 on, most of the bus control logic is in a Xilinx XC9572 CPLD.

Left: REV 4.0 (v4/). Right: REV 5.0 (v5/).

- Board: 254.0 x 134.6 mm (10.0 x 5.3 in), two layers, the same outline on all revisions. - Switches and jumpers (v5): DIP switches "RAM WAIT", "I/O WAIT" and "ROM WAIT". SW1 "RESET". K1 "ROM LOCK". P6 "CLK SEL". P7 "NMI ENABLE". P5 "XILINX CABLE" (JTAG). P11 is the CPLD I/O header. - LEDs (v5): "Z80 BUS MASTER", "ROM SELECT", "WAIT", "POWER", and D4–D7, D9…

Board, from the project README
From the project README

Main components on the Board

Z8074LS37374LS15374LS15774LS3274LS165273274LS682N74LS27374LS24474LS0274LS0474LS0574LS13974LS0074LS7474F0474S0874S0074LS272.0000 MHz74LS11LDO_REG_7805

Board bill of materials (BOM)

163 components, 52 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
Z80
U1
4
74LS373
U2, U3, U12, U22
2
74LS153
U4, U6
2
74LS157
U5, U8
3
74LS32
U7, U35, U44
3
74LS165
U9, U10, U11
1
2732
U13
1
74LS682N
U14
2
74LS273
U16, U17
3
74LS244
U19, U20, U21
2
74LS02
U23, U45
4
74LS04
U24, U25, U36, U47
2
74LS05
U26, U37
1
74LS139
U27
3
74LS00
U28, U31, U49
5
74LS74
U29, U30, U32, U33, U34
1
74F04
U38
1
74S08
U39
1
74S00
U40
1
74LS27
U41
Show 32 more
QtyPartRefs
1
2.0000 MHz
U42
1
74LS11
U43
1
LDO_REG_7805
U48
1
2N3904
Q1
6
^^NPN-SOT23
Q2, Q3, Q4, Q5, Q6, Q7
1
S100_MALE
P1
1
CONN_4X2
P2
2
CLK_CPU
P3, P5
2
CONN_2X2
P4, P37
1
CLK_SEL
P6
2
CONN_1
P34, P35
1
CONN_3X2
P36
4
JUMPER
JP4, JP5, JP6, JP7
3
CONN_3
K1, K2, K4
5
CONN_8
Px1, Px2, Px3, Px4, Px5
7
1000
RR2, RR3, RR4, RR5, RR6, RR8, RR9
1
4700
RR7
3
DIPS_08
SW2, SW3, SW4
1
—
Z80cpuV3
6
DONE
D1, D2, D3, D4, D5, D7
1
1N4148
D6
1
47 uF
C1
44
0.1 uF
C2, C4, C7, C8, C9, C10, C11, C12 +36
1
0.1 uF
C3
1
22 uF
C42
1
33 uF
C43
6
330
R1, R3, R7, R9, R12, R14
6
470
R2, R6, R8, R10, R13, R15
1
4K7
R4
1
330
R5
3
4700
R11, R39, R41
4
10
R35, R36, R37, R38

Board design files

The KiCad project lives in the CatspersCoffee/S100-Boards repository on GitHub; these links point at the commit this page was built from.

Board: common questions

How big is the Board?

The Board measures 254 × 134.6 mm and is 1.6002 mm thick.

How many components are on the Board?

163 components, from 52 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 Board design files?

From the CatspersCoffee/S100-Boards repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the Board design in my own project?

It is published under Custom license, which limits how it may be reused; read the license before building on it.

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