UMMF
About the UMMF PCB
UMMF is an open source PCB design by nils-eilers, published on GitHub. It is a 2-layer board measuring 105 × 100 mm, with 63 components from 34 distinct parts.
Other key parts include the 6502, 6809E, 74HCT11, EPM7128S and AT29C010A. By type, the board carries 33 capacitors, 13 ICs, 6 connectors, 6 resistors, 2 switches and 1 transistor.
It belongs with the retro computing designs in this gallery.
From the project
Upgrades your CBM 8032 to a SuperPET
The SuperPET is basically a Commodore CBM 8032 with two, later only one extra boards in it which contain a 6809 CPU, 64 KB RAM and some ROMs. This project aims to provide a replacement for these extra board(s) with slightly more modern parts, enabling every CBM 8032 owner to upgrade his machine to a SuperPET.
This board requires a NMOS 6502. Do NOT use a CMOS 6502!
Main components on the UMMF
UMMF bill of materials (BOM)
63 components, 34 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 6502 | DIP-40_W15.24mm | U1 |
| 1 | 6809E | DIP-40_W15.24mm | U2 |
| 1 | 74HCT11 | DIP-14_W7.62mm | U3 |
| 1 | EPM7128S | PLCC-84_THT-Socket | U4 |
| 1 | AT29C010A | DIP-32-15.24 | U5 |
| 1 | HM628512A | DIP-32-15.24 | U6 |
| 1 | 74LS06 | DIP-14_W7.62mm | U7 |
| 2 | MAX232 | DIP-16_W7.62mm | U8, U11 |
| 1 | 6551 | DIP-28 | U9 |
| 1 | 74LS123 | DIP-16_W7.62mm | U10 |
| 1 | TSR 1-2450 | TO-220-3_Vertical | U12 |
| 1 | 7805 | TO-220-3_Vertical | U14 |
| 1 | 2N4403 | TO-92 | Q1 |
| 1 | 1.8432 MHz, HC49U | Crystal_HC49-U_Vertical | X1 |
| 1 | JTAG | Multicomp_MC9A12-1034_2x05x2.54mm_Straight | J1 |
| 1 | 6502 socket | DIP-40_W15.24mm | J2 |
| 1 | Conn_01x01 | SolderWirePad_single_1mmDrill | J3 |
| 1 | DB9_Male_MountingHoles | DB9MC | J4 |
| 1 | Conn_01x02 | Molex_KK-6410-02_02x2.54mm_Straight | J5 |
| 1 | Conn_02x05_Odd_Even | Multicomp_MC9A12-1034_2x05x2.54mm_Straight | J8 |
Show 14 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | Write Protect | WSL_6W_HALF | SW1 |
| 1 | CPU Select | WSL_6W_HALF | SW2 |
| 1 | LED | LED_D3.0mm | D1 |
| 3 | 10nF | C_Disc_D5.0mm_W2.5mm_P5.00mm | C1, C2, C3 |
| 11 | 1uF | C_Disc_D5.0mm_W2.5mm_P5.00mm | C4, C14, C24, C28, C29, C30, C31, C32 +3 |
| 9 | 100nF | C_Disc_D5.0mm_W2.5mm_P5.00mm | C5, C6, C7, C8, C9, C10, C11, C12 +1 |
| 2 | 22pF | C_Disc_D5.0mm_W2.5mm_P2.50mm | C15, C27 |
| 7 | 220nF | C_Disc_D5.0mm_W2.5mm_P5.00mm | C16, C17, C18, C19, C20, C21, C22 |
| 1 | 100 µF | CP_Radial_D6.3mm_P2.50mm | C26 |
| 1 | 680 | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1 |
| 2 | 22k | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R6, R7 |
| 1 | 510R | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R9 |
| 1 | 1k5 | R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R10 |
| 1 | 6 x 3k3 | R_Array_SIP7 | RN1 |
UMMF design files
The KiCad project lives in the nils-eilers/uMMF repository on GitHub; these links point at the commit this page was built from.
- Layoutkicad/superpet.kicad_pcb
UMMF: common questions
How big is the UMMF PCB?
The UMMF measures 105 × 100 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the UMMF?
63 components, from 34 distinct parts. The full bill of materials is listed on this page.
Where can I download the UMMF design files?
From the nils-eilers/uMMF repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the UMMF design in my own project?
The repository has no license, so all rights stay with nils-eilers. Use it as a reference, and ask the author before reusing the design.
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