6809PC
About the 6809PC PCB
6809PC is an open source PCB design by danwerner21, published on GitHub. It is a 2-layer board measuring 244 × 244 mm, with 155 components from 63 distinct parts.
Other key parts include the 74LS04, 74LS244, 74LS682, 74LS86 and 74LS02. By type, the board carries 64 capacitors, 46 ICs, 23 connectors, 9 resistors, 4 diodes and 2 jumpers.
From the project
6809 PC
See this repo (https://github.com/danwerner21/CUBIX09) for ROM image and operating system.
K1 - ROM BANK Selection (2-3 high bank, 1-2 Low Bank) K2 - MMU Selection (1-2 Disable on int, 3-4 Clear Task register on int)
JP1 - Reset Swithc Connection JP3 - CTS Pull Up Enable
P12 - Power Switch Connection P15 - CPU Speed Selection P18 - Serial Port Connection
Main components on the 6809PC
6809PC bill of materials (BOM)
155 components, 63 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 74LS04 | STD_DDW_DIP14 | U1 |
| 6 | 74LS244 | STD_DDW_DIP20 | U2, U34, U36, U39, U45, U46 |
| 1 | 74LS682 | STD_DDW_DIP20 | U3 |
| 1 | 74LS86 | STD_DDW_DIP14 | U4 |
| 1 | 74LS02 | STD_DDW_DIP14 | U5 |
| 2 | 74LS00 | STD_DDW_DIP14 | U6, U21 |
| 3 | 74LS32 | STD_DDW_DIP14 | U7, U10, U16 |
| 1 | SRAM_512K | STD_DDW_DIP32 | U8 |
| 2 | 74LS08 | STD_DDW_DIP14 | U9, U15 |
| 1 | 27C256 | DIP-28_W15.24mm | U11 |
| 2 | 74LS74 | STD_DDW_DIP14 | U12, U22 |
| 1 | 74LS14 | STD_DDW_DIP14 | U17 |
| 1 | 74LS06 | STD_DDW_DIP14 | U18 |
| 1 | 74HCT14 | STD_DDW_DIP14 | U19 |
| 1 | 74LS688 | STD_DDW_DIP20 | U23 |
| 2 | 74LS138 | STD_DDW_DIP16 | U24, U42 |
| 6 | 74LS245 | STD_DDW_DIP20 | U25, U26, U27, U28, U32, U41 |
| 1 | DS1233 | STD_DDW_TO92 | U29 |
| 1 | 74LS163 | STD_DDW_DIP16 | U30 |
| 1 | 74LS240 | STD_DDW_DIP20 | U31 |
Show 43 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | MC68B09 | STD_DDW_DIP40 | U33 |
| 1 | 74LS174 | STD_DDW_DIP16 | U35 |
| 1 | 74LS157 | STD_DDW_DIP16 | U37 |
| 1 | 74LS374 | STD_DDW_DIP20 | U38 |
| 1 | SRAM-32K | STD_DDW_DIP28_SKINNY | U40 |
| 2 | 74LS257 | STD_DDW_DIP16 | U43, U44 |
| 1 | M6242 | STD_DDW_DIP18 | U47 |
| 1 | G65SC51P | STD_DDW_DIP28 | U48 |
| 1 | MAX232 | STD_DDW_DIP16 | U49 |
| 1 | RTC_OSC | DDW_STD_RTCCRYSTAL | X1 |
| 6 | IRQ Selection | STD_DDW_PINHEAD_V_2x06 | J1, J2, J5, J7, J9, J13 |
| 6 | Bus_ISA_8bit | BUSPC_HOST | J3, J4, J6, J8, J10, J14 |
| 1 | TTL SERIAL CONSOLE | STD_DDW_PINHEAD_V_1x06 | J11 |
| 1 | TTL CONSOLE PWR | STD_DDW_PINHEAD_V_1x02 | J12 |
| 1 | SHADOW ADDR | STD_DDW_PINHEAD_V_2x04 | P1 |
| 1 | CONN_10X2 | ATXConnector | P11 |
| 1 | POWER_SW | STD_DDW_PINHEAD_V_1x02 | P12 |
| 1 | 14.31818 MHz CLK | STD_DDW_DIP14 | P13 |
| 1 | 16.000Mhz | STD_DDW_DIP14 | P14 |
| 1 | CPU CLOCK SPEED | STD_DDW_PINHEAD_V_2x04 | P15 |
| 1 | CONN_4 | STD_DDW_PINHEAD_V_1x04 | P16 |
| 1 | 1.8432 MHz CLK | STD_DDW_DIP14 | P17 |
| 1 | SERIAL | STD_DDW_PINHEAD_V_2x05 | P18 |
| 2 | JUMPER | STD_DDW_PINHEAD_V_1x02 | JP1, JP3 |
| 1 | ROM SELECT | STD_DDW_PINHEAD_V_1x03 | K1 |
| 1 | MMU-INTA | STD_DDW_PINHEAD_V_1x03 | K2 |
| 1 | 2200 | STD_DDW_SIP10 | RR1 |
| 1 | 22K | STD_DDW_SIP10 | RR2 |
| 1 | POWER | STD_DDW_TACTSW | SW1 |
| 1 | RESET | STD_DDW_TACTSW | SW2 |
| 2 | 1N4148 | STD_DDW_DIODE | D1, D2 |
| 2 | D | STD_DDW_DIODE | D3, D4 |
| 5 | 22 uF | STD_DDW_PCAP | C1, C2, C3, C4, C17 |
| 49 | 0.1 uF | STD_DDW_CAP | C5, C6, C7, C8, C9, C10, C11, C12 +41 |
| 1 | 1uF | STD_DDW_PCAP | C28 |
| 1 | 10uF | STD_DDW_PCAP | C35 |
| 1 | 0.01 uF | STD_DDW_CAP | C57 |
| 2 | 15pf | STD_DDW_CAP | C59, C60 |
| 5 | 1.0 uF | STD_DDW_PCAP | C61, C63, C64, C65, C66 |
| 2 | 10k | STD_DDW_RESISTOR | R1, R3 |
| 1 | 470 | STD_DDW_RESISTOR | R2 |
| 3 | 4.7K | STD_DDW_RESISTOR | R4, R7, R26 |
| 3 | 1000 | STD_DDW_RESISTOR | R5, R6, R8 |
6809PC design files
The KiCad project lives in the danwerner21/6809PC repository on GitHub; these links point at the commit this page was built from.
- Layout6809PC-6U.kicad_pcb
- Schematic6809PC-6U.kicad_sch
6809PC: common questions
How big is the 6809PC PCB?
The 6809PC measures 244 × 244 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the 6809PC?
155 components, from 63 distinct parts. The full bill of materials is listed on this page.
Where can I download the 6809PC design files?
From the danwerner21/6809PC repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the 6809PC 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.