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We816

danwerner21·we816·Hardware/we816.kicad_pcb

We816 PCB layout, top view — open source board by danwerner21
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About the We816 PCB

We816 is an open source PCB design by danwerner21, published on GitHub. It is a 2-layer board measuring 360.1 × 141.4 mm, with 128 components from 65 distinct parts.

Other key parts include the 74LS393, 7406, 74LS06N, 74LS14 and 74LS04. By type, the board carries 50 capacitors, 31 ICs, 18 resistors, 13 connectors, 3 crystals and 3 relays.

It belongs with the retro computing designs in this gallery.

From the project

The WE816 is a 16-bit 65816 based system with 512K of System RAM, 96K of System ROM, 32K of video RAM, a TMS9918 graphics processor and an AY-3-8910 Sound chip. The system runs a custom version of BASIC and supports commodore compatible IEC disk drives.

EhBASIC by Lee Davison was ported to the 65816 CPU on the WE816 computer. It is designed to allow a full 64K bank for BASIC code and variables with the BASIC interpreter running in a totally different bank. Full documentation on the basic intrepreter can be found in the support folder

* RTC Hardware (fixed needs PCB created and tested)

1. The WE816 Mainboard PCB Kicad design and Gerber files 2. The source code and binaries for the WE816 BASIC interpreter 3. The source code and binaries for the WE816 BIOS firmware 4. The source code and binaries for several hardware test programs 5. The…

We816, from the project README
From the project README

Main components on the We816

74LS393740674LS06N74LS1474LS04TMS991874LS574RAM_32KO74LS32GAL16V8GAL20V816550DS1302MAX232W65C22NxP74LS24574LS244AY-3-8910SRAM_512KO658C1627C25627C51274LS373

We816 bill of materials (BOM)

128 components, 65 distinct parts.

QtyPartRefs
1
74LS393
U1
1
7406
U2
1
74LS06N
U3
1
74LS14
U4
1
74LS04
U5
1
TMS9918
U6
1
74LS574
U7
2
74LS574
U8, U9
1
RAM_32KO
U10
1
74LS32
U11
2
GAL16V8
U12, U14
1
GAL20V8
U13
1
16550
U15
1
DS1302
U16
1
MAX232
U17
2
W65C22NxP
U18, U19
5
74LS245
U20, U22, U23, U24, U31
1
74LS244
U21
1
AY-3-8910
U25
1
SRAM_512KO
U26
Show 45 more
QtyPartRefs
1
658C16
U27
1
27C256
U28
1
27C512
U29
1
74LS373
U30
1
2N3904
Q1
1
10.7 MHz
X1
1
CXO_DIP8
X2
1
CRYSTAL 32.768 KHz
X3
1
Conn_01x02_Male
J1
1
TTL Serial
J2
1
KEYBOARD
J3
1
IEC PORT
J4
1
CASELEDS
J5
1
INTERRUPT SELECT
J6
1
expansion port
J7
1
AudioJack3
J8
1
SERIAL
P1
1
CHAN_MIX
P2
1
POWER
P3
1
RESET
P4
1
CLK_CPU
P5
1
Battery_Cell
BT1
1
1&2 FOR SMALL ROM, 2&3 FOR LARGE ROM
K1
1
USE FOR 512K SRAM OR 128K SRAM
K2
1
1&2 FOR 27C256, 2&3 FOR 29C256
K3
1
1KΩ
RR1
2
4700Ω
RR2, RR3
1
4700Ω
RR4
2
4700Ω
RV1, RV2
1
BICOLOR LED
D1
1
INDUCTOR (BEAD)
L1
35
0.1 µF
C1, C2, C3, C4, C5, C6, C7, C8 +27
2
33 pF
C34, C35
2
22 µF
C36, C48
1
220 µF
C38
5
1.0µF
C39, C40, C41, C42, C43
2
270 pF
C44, C45
3
10 µF
C46, C47, C50
1
0Ω
R1
1
470Ω
R2
2
75Ω
R3, R4
7
1KΩ
R5, R6, R7, R8, R9, R10, R18
5
10KΩ
R11, R12, R13, R14, R17
1
100Ω
R15
1
10Ω
R16

We816 design files

The KiCad project lives in the danwerner21/we816 repository on GitHub; these links point at the commit this page was built from.

We816: common questions

How big is the We816 PCB?

The We816 measures 360.1 × 141.4 mm, has 2 copper layers and is 1.6002 mm thick.

How many components are on the We816?

128 components, from 65 distinct parts. The full bill of materials is listed on this page.

Where can I download the We816 design files?

From the danwerner21/we816 repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the We816 design in my own project?

The repository has no license, so all rights stay with danwerner21. Use it as a reference, and ask the author before reusing the design.

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