Dragon32Rev3
About the Dragon32Rev3 PCB
Dragon32Rev3 is an open source PCB design by jimbro1000, published on GitHub under the MIT license. It is a 2-layer board measuring 253 × 169.1 mm, with 169 components from 91 distinct parts.
Other key parts include the 4164, 74ACT138, MC6883, 74LS244N and 27C256. By type, the board carries 57 resistors, 42 capacitors, 29 ICs, 9 diodes, 8 jumpers and 5 connectors.
It belongs with the audio designs in this gallery.
From the project
This project started as a recreation of the SA2120 CPU Mainboard for the 1982 Dragon Data Dragon 32
This project started as a recreation of the SA2120 CPU Mainboard for the 1982 Dragon Data Dragon 32
Everything (excluding modifications) is taken from the SA2120 schematics. Where this version changes is that the options to use banks of 16K DRAM is gone, you must use 64K DRAMs, with it goes all the extra circuitry for configuring the memory for different types of chip.
Main components on the Dragon32Rev3
Dragon32Rev3 bill of materials (BOM)
169 components, 91 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 8 | 4164 | DIP-16_W7.62mm | IC1, IC2, IC3, IC4, IC5, IC6, IC7, IC8 |
| 1 | 74ACT138 | DIP-16_W7.62mm | IC10 |
| 1 | MC6883 | DIP-40_W15.24mm | IC15 |
| 2 | 74LS244N | DIP-20_W7.62mm | IC16, IC24 |
| 1 | 27C256 | DIP-28_W15.24mm | IC17 |
| 2 | 74LS08 | DIP-14_W7.62mm | IC18, IC38 |
| 1 | MC6809E | DIP-40_W15.24mm | IC19 |
| 1 | MC14529B | DIP-16_W7.62mm | IC20 |
| 1 | LM393P | DIP-8_W7.62mm | IC25 |
| 2 | MC6821 | DIP-40_W15.24mm | IC26, IC35 |
| 1 | 74LS02N | DIP-14_W7.62mm | IC31 |
| 1 | 74ACT138N | DIP-16_W7.62mm | IC33 |
| 1 | MC14050BCP | DIP-16_W7.62mm | IC34 |
| 1 | 74LS132 | DIP-14_W7.62mm | IC36 |
| 1 | GAL | DIP-24_W7.62mm | IC37 |
| 1 | 74LS04 | DIP-14_W7.62mm | IC39 |
| 1 | MAX3232 | DIP-16_W7.62mm | U1 |
| 1 | GAL22V10 | DIP-24_W7.62mm | U2 |
| 1 | M6551 | DIP-28_W15.24mm | U12 |
| 1 | Video Output Female | PinSocket_1x05_P2.54mm_Vertical | J1 |
Show 71 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | Board Interconnect Female | PinSocket_2x11_P2.54mm_Vertical | J2 |
| 1 | CONN_02X08_ODD_EVEN Conn_02x08_Odd_Even | PinSocket_2x08_P2.54mm_Vertical | J3 |
| 1 | PSG Audio | AY-QTHT | J4 |
| 1 | Config | PinHeader_2x06_P2.54mm_Vertical | J5 |
| 1 | 32K/64K 32k/64k | PinHeader_1x03_P2.54mm_Vertical | JP1 |
| 1 | printer/comms | PinHeader_1x03_P2.54mm_Vertical | JP2 |
| 1 | SELECT ROM | PinHeader_1x03_P2.54mm_Vertical | JP3 |
| 1 | 5VPOWER 5vPower | PinHeader_1x02_P2.54mm_Vertical | JP4 |
| 1 | Z8HI/LOW Z8hi/low | SolderJumper-3_P1.3mm_Open_Pad1.0x1.5mm | JP5 |
| 1 | ROM A14 | Jumper_4 | JP6 |
| 1 | 27C512 | SolderJumper-3_P1.3mm_Open_Pad1.0x1.5mm | JP7 |
| 1 | KBD_Config | PinHeader_1x03_P2.54mm_Vertical | JP8 |
| 1 | CONN_01X18_PIN Conn_01x18_Pin | PinHeader_1x18_P2.54mm_Vertical | PL1 |
| 1 | CHR20G Printer | IDC-Header_2x10-1MP_P2.54mm_Latch_Horizontal | PL2 |
| 1 | DIN-6 J/S R | DIN-6_DELTRON_671-0601_Horizontal | PL3 |
| 1 | DIN-5 (180) Cassette | DIN-5_DELTRON_671-0501_45deg_Horizontal | PL4 |
| 1 | DIN-6 J/S L | DIN-6_DELTRON_671-0601_Horizontal | PL5 |
| 1 | CONN_01X09_MALE Conn_01x09_Male | Molex_KK-396_A-41791-0009_1x09_P3.96mm_Vertical | PL6 |
| 1 | 151-395-040-558-201 EDAC 392-040-558-201 | Edge_2x20_P2.54mm_OvalMP | PL7 |
| 1 | 151-395-040-558-201 EDAC 392-040-558-201 | PinHeader_2x20_P2.54mm_Vertical | PL8 |
| 1 | Serial | DIN-7_DELTRON_671-0701_Horizontal | PL9 |
| 1 | 41-OJS-SH-105HMF,00000-ND OJS HM FORM A | OJS HM 10A Relay | RL1 |
| 1 | 470R | Potentiometer_Bourns_3386X_Horizontal | RV3 |
| 1 | 401-1225 RESET | Button_AlpsAlpine_SPUN190900 | SW1 |
| 1 | PN2222 | TO-92_Inline_Wide | TR1 |
| 1 | 14.31818MHZ 14.31818MHz | Crystal_HC49-U_Horizontal | XL2 |
| 1 | 1.8432MHZ 1.8432MHz | Crystal_HC18-U_Horizontal_1EP_style2 | XL3 |
| 6 | 1N914 | D_DO-35_SOD27_P7.62mm_Horizontal | D1, D2, D3, D7, D8, D9 |
| 3 | 1N914 | D_DO-35_SOD27_P2.54mm_Vertical_KathodeUp | D4, D5, D6 |
| 4 | 3.3UH 3.3uH | L_Axial_L7.0mm_D3.3mm_P5.08mm_Vertical_Fastron_MICC | L1, L2, L3, L4 |
| 8 | 0.01UF 0.01uF | C_Disc_D4.3mm_W1.9mm_P5.00mm | C1, C13, C38, C39, C43, C45, C68, C69 |
| 3 | 10UF 10uF | CP_Radial_D5.0mm_P2.50mm | C2, C35, C42 |
| 8 | 100NF 100nF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C3, C5, C6, C7, C8, C9, C10, C12 |
| 10 | 0.1UF 0.1uF | C_Disc_D4.3mm_W1.9mm_P5.00mm | C4, C14, C15, C16, C17, C18, C19, C20 +2 |
| 2 | 4.7UF 4.7uF | CP_Radial_D5.0mm_P2.50mm | C11, C37 |
| 1 | 100UF 100uF | CP_Radial_D6.3mm_P2.50mm | C22 |
| 1 | 1UF 1uF | CP_Radial_D5.0mm_P2.50mm | C23 |
| 1 | 2.2NF 2.2nF | C_Disc_D3.0mm_W2.0mm_P2.50mm | C26 |
| 4 | 22NF 22nF | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C30, C31, C32, C33 |
| 1 | 22PF 22pF | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C40 |
| 1 | 33PF 33pF | C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C41 |
| 1 | 22NF 22nF | C_Disc_D5.0mm_W2.5mm_P5.00mm | C44 |
| 1 | 22PF 22pF | C_Disc_D3.0mm_W2.0mm_P2.50mm | C48 |
| 1 | 100R | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1 |
| 5 | 1K | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R2, R3, R4, R49, R54 |
| 1 | 1K | R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R5 |
| 2 | 4K7 | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R10, R11 |
| 12 | 22R | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R12, R19, R20, R21, R22, R23, R24, R25 +4 |
| 8 | 4K7 | R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R13, R14, R30, R31, R32, R39, R40, R41 |
| 2 | 100K | R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R15, R36 |
| 1 | 33K | R_Axial_DIN0207_L6.3mm_D2.5mm_P2.54mm_Vertical | R16 |
| 1 | 68K | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R29 |
| 1 | 1K5 | R_0603_1608Metric_Pad1.05x0.95mm_HandSolder | R37 |
| 2 | 4K7 | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R38, R63 |
| 4 | 10K | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R42, R43, R55, R56 |
| 1 | 6K8 | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R45 |
| 1 | 220R | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R46 |
| 1 | 8K2 | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R47 |
| 1 | 15K | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R48 |
| 2 | 56K | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R50, R52 |
| 1 | 1M5 | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R51 |
| 1 | 10M | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R53 |
| 1 | RNF14FTD20K0 20K 1% | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R57 |
| 1 | RNF14FTD80K6 80K6 1% | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R58 |
| 1 | S160CA 160K 1% | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R59 |
| 1 | S330KCA 330K 1% | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R60 |
| 1 | RNF14FTD41K2 40K2 1% | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R61 |
| 1 | RNF14FTD10K0 10K 1% | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R62 |
| 1 | 100K | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R64 |
| 1 | 4K7 4k7 | R_Array_Convex_8x0602 | RN1 |
| 1 | 4K7X6 4K7x6 | R_Array_SIP7 | RN2 |
Dragon32Rev3 design files
The KiCad project lives in the jimbro1000/Dragon32Rev3 repository on GitHub; these links point at the commit this page was built from.
- LayoutDragon32.kicad_pcb
- SchematicDragon32.kicad_sch
- BOMDragon32.csv
Dragon32Rev3: common questions
How big is the Dragon32Rev3 PCB?
The Dragon32Rev3 measures 253 × 169.1 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Dragon32Rev3?
169 components, from 91 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 Dragon32Rev3 design files?
From the jimbro1000/Dragon32Rev3 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 Dragon32Rev3 design in my own project?
Yes, under the terms of its MIT license, which jimbro1000 chose for the repository.
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