Retroii
About the Retroii PCB
Retroii is an open source PCB design by jonthomasson, published on GitHub. It is a 4-layer board measuring 330.2 × 215.9 mm, with 295 components from 99 distinct parts.
Other key parts include the 74LS00, 74LS11, Prop_P8X32A, 24LC256_EEPROM and AT28C256_EEPROM. By type, the board carries 89 capacitors, 89 resistors, 25 connectors, 22 jumpers, 16 ICs and 10 inductors.
It belongs with the retro computing designs in this gallery.
From the project
Retro ][ is a 6502 based computer based off of the Apple ][.
Growing up in the 80's I was part of an amazing and special time for computers. Every school I remember had a computer lab loaded with Apple ]['s running such iconic games as Oregon Trail, Odell Lake, and Number Munchers. My mom was a school teacher and somehow we were lucky enough to actually buy an Apple ][ to use at home. That to me sparked an interest in computers and technology that has followed me all these many decades later.
Main components on the Retroii
Retroii bill of materials (BOM)
295 components, 99 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 74LS00 | DIP-14_W7.62mm_Socket_LongPads | U1 |
| 1 | 74LS11 | DIP-14_W7.62mm_Socket_LongPads | U3 |
| 2 | Prop_P8X32A | DIP-40_W15.24mm_Socket_LongPads | U4, U16 |
| 2 | 24LC256_EEPROM | DIP-8_W7.62mm_Socket_LongPads | U5, U17 |
| 1 | AT28C256_EEPROM | 28-526-11-SOCKET | U6 |
| 1 | IDT7008_Dual_Port_RAM | Assman_PLCC84_ACCS084GT | U8 |
| 1 | 74LS32 | DIP-14_W7.62mm_Socket_LongPads | U9 |
| 1 | 74LS08 | DIP-14_W7.62mm_Socket_LongPads | U10 |
| 2 | LM2576-12 | TO-220-5_Horizontal_TabDown | U11, U13 |
| 2 | LM2576-5 | TO-220-5_Horizontal_TabDown | U12, U15 |
| 1 | LM2576-3.3 | TO-220-5_Horizontal_TabDown | U14 |
| 1 | 74LS04 | DIP-14_W7.62mm_Socket_LongPads | U18 |
| 1 | Keyboard Connector | DIP-16_W7.62mm_Socket_LongPads | A7 |
| 1 | 74LS02 | DIP-14_W7.62mm_Socket_LongPads | A12 |
| 1 | 555 Timer | DIP-8_W7.62mm_Socket_LongPads | A13 |
| 1 | MPSA13 | TO-92_Inline | Q4 |
| 1 | 2N3904 | TO-92_Inline | Q5 |
| 2 | 5MHz 20pf | crystal_hc-49s | Y1, Y3 |
| 1 | ECS-2100X-1MHZ | ECS-2100AX | Y2 |
| 1 | SD_Card_SPI | DM1AASFPEJ_SDCARD | CON1 |
Show 79 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | VGA | Amphenol_ICD15S13E6GV00LF | J1 |
| 1 | DB9_Female_Stacked | Amphenol_L17H2220131 | J2 |
| 1 | DB15_Female_Stacked | Amphenol_L17H2440131 | J3 |
| 1 | Edge mounted connector | PinSocket_2x08_P2.54mm_Vertical | J6 |
| 1 | Cassette In | SJ13525NHeadphone | J7 |
| 1 | Cassette Out | SJ13525NHeadphone | J8 |
| 1 | Speaker Jack | PinSocket_1x02_P2.54mm_Vertical | J9 |
| 1 | BARREL_JACK | Barrel_Jack_PJ002A | J10 |
| 1 | Conn_02x10 | PinSocket_2x10_P2.54mm_Vertical | J11 |
| 1 | Peripheral Slot 0 | TE_5530841-5 | J12 |
| 1 | 74LS74 | DIP-14_W7.62mm_Socket_LongPads | J13 |
| 1 | Game_IO_Socket | DIP-16_W7.62mm_Socket_LongPads | J14 |
| 1 | Peripheral Slot 4 | TE_5530841-5 | J15 |
| 1 | Peripheral Slot 1 | TE_5530841-5 | J16 |
| 1 | Peripheral Slot 5 | TE_5530841-5 | J17 |
| 1 | Peripheral Slot 2 | TE_5530841-5 | J18 |
| 1 | Peripheral Slot 6 | TE_5530841-5 | J19 |
| 1 | Peripheral Slot 3 | TE_5530841-5 | J20 |
| 1 | Peripheral Slot 7 | TE_5530841-5 | J21 |
| 1 | Conn_01x09 | PinSocket_1x09_P2.54mm_Vertical | J22 |
| 1 | Conn_01x02 | PinSocket_1x02_P2.54mm_Vertical | J23 |
| 1 | Headphone | SJ13525NHeadphone | J24 |
| 2 | PROP_PLUG | PinHeader_1x04_P2.54mm_Vertical | P1, P2 |
| 2 | 74LS257 | DIP-16_W7.62mm_Socket_LongPads | B6, B7 |
| 1 | 74LS74 | DIP-14_W7.62mm_Socket_LongPads | B10 |
| 1 | 74LS08 | DIP-14_W7.62mm_Socket_LongPads | B11 |
| 1 | 1N914 | D_DO-35_SOD27_P7.62mm_Horizontal | CR1 |
| 1 | Fuse 2.5 amp | littlefuse_5.08_radial | F1 |
| 2 | 74LS138 | DIP-16_W7.62mm_Socket_LongPads | F12, F13 |
| 1 | 74LS259 | DIP-16_W7.62mm_Socket_LongPads | F14 |
| 1 | 74LS08 | DIP-14_W7.62mm_Socket_LongPads | H1 |
| 2 | 74LS138 | DIP-16_W7.62mm_Socket_LongPads | H2, H12 |
| 1 | 65C02 | DIP-40_W15.24mm_Socket_LongPads | H7 |
| 1 | 74LS251 | DIP-16_W7.62mm_Socket_LongPads | H14 |
| 2 | NE556 | DIP-14_W7.62mm_Socket_LongPads | H131, H132 |
| 1 | User 1 Jumper | PinHeader_1x02_P2.54mm_Vertical | JP1 |
| 13 | Jumper_NO_Small | PinHeader_1x02_P2.54mm_Vertical | JP2, JP3, JP4, JP5, JP9, JP10, JP11, JP12 +5 |
| 1 | JP_ROM_EN | PinHeader_1x03_P2.54mm_Vertical | JP6 |
| 1 | JP_RAM_EN | PinHeader_1x03_P2.54mm_Vertical | JP7 |
| 1 | JP_RAM_OE | PinHeader_1x03_P2.54mm_Vertical | JP8 |
| 1 | Jumper | PinHeader_1x02_P2.54mm_Vertical | JP15 |
| 4 | Jumper_NC_Small | PinHeader_1x02_P2.54mm_Vertical | JP16, JP17, JP18, JP19 |
| 1 | PS2_KEYBOARD | MD60SM | K1 |
| 1 | LM741 | DIP-8_W7.62mm_Socket_LongPads | K13 |
| 1 | Speaker | CUI_CVI_1708 | LS1 |
| 1 | 1K | R_Array_SIP6 | RA1 |
| 1 | 1K R_Network | R_Array_SIP4 | RA2 |
| 1 | Volume | BOURNS_91A1A-B24-D15L | RV1 |
| 2 | SW_PUSH_SAFE | TE_1825910-6 | SW1, SW5 |
| 1 | SPST2 | SW_Micro_Right_Angle_SPST | SW2 |
| 1 | SAVE | TE_Tactile_2-1825027-0 | SW3 |
| 1 | LOAD | TE_Tactile_2-1825027-0 | SW4 |
| 1 | RESET | TE_Tactile_2-1825027-0 | SW6 |
| 1 | MISC1 | TE_Tactile_2-1825027-0 | SW7 |
| 1 | MISC2 | TE_Tactile_2-1825027-0 | SW8 |
| 1 | LED | WP1503CB_LED | LED1 |
| 5 | 1N5822 | D_DO-201AD_P15.24mm_Horizontal | D1, D2, D3, D4, D5 |
| 5 | 68uH | Bourns_SRP1770TA-101M | L1, L2, L3, L7, L8 |
| 5 | 20uH | Pulse_PF0382.223NLT | L4, L5, L6, L9, L10 |
| 41 | .1uF | C_Disc_D3.0mm_W2.0mm_P2.50mm | C1, C2, C4, C9, C10, C12, C13, C14 +33 |
| 2 | 1uf | C_Disc_D4.7mm_W2.5mm_P5.00mm | C3, C37 |
| 4 | .022uF | C_Disc_D3.4mm_W2.1mm_P2.50mm | C5, C6, C7, C8 |
| 1 | 74LS04 | DIP-14_W7.62mm_Socket_LongPads | C11 |
| 10 | 100uF | CP_Radial_D8.0mm_P3.50mm | C19, C20, C21, C25, C26, C27, C28, C29 +2 |
| 5 | 1000uF | CP_Radial_D13.0mm_P5.00mm | C22, C23, C24, C30, C31 |
| 26 | DNP | C_Disc_D3.0mm_W2.0mm_P2.50mm | C58, C59, C60, C61, C62, C63, C64, C65 +18 |
| 26 | 1K | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R1, R3, R4, R5, R6, R7, R8, R9 +18 |
| 11 | 10k | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R2, R32, R33, R50, R53, R54, R59, R60 +3 |
| 5 | 240 | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R11, R12, R13, R27, R31 |
| 1 | 1M | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R15 |
| 5 | 12K | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R16, R17, R19, R29, R30 |
| 11 | 100 | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R18, R20, R21, R22, R23, R51, R52, R63 +3 |
| 1 | 47K | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R24 |
| 1 | 27 | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R25 |
| 1 | 2.2M | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R26 |
| 17 | 0 | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R34, R35, R36, R37, R38, R39, R40, R43 +9 |
| 8 | DNP | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R41, R47, R55, R83, R85, R87, R89, R91 |
| 1 | 330 | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R49 |
| 1 | 3.3K | R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal | R92 |
Retroii design files
The KiCad project lives in the jonthomasson/retroii repository on GitHub; these links point at the commit this page was built from.
Retroii: common questions
How big is the Retroii PCB?
The Retroii measures 330.2 × 215.9 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the Retroii?
295 components, from 99 distinct parts. The full bill of materials is listed on this page.
Where can I download the Retroii design files?
From the jonthomasson/retroii repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the Retroii design in my own project?
The repository has no license, so all rights stay with jonthomasson. Use it as a reference, and ask the author before reusing the design.
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