HardLabs

Phram 1

piotr-wiszowaty·phram_1·pcb/phram_1.kicad_pcb

Phram 1 PCB layout, top view — open source board by piotr-wiszowaty

About the Phram 1 PCB

Phram 1 is an open source PCB design by piotr-wiszowaty, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 100 × 66 mm, with 55 components from 16 distinct parts.

Other key parts include the MC68000FN, 74LVX245, XC2C256-TQ144, AS4C4M16SA and MCP1703A-1802/MB. By type, the board carries 29 capacitors, 11 ICs, 8 resistors, 4 connectors, 1 transistor and 1 crystal.

It belongs with the retro computing designs in this gallery.

From the project

phram\_1 is a Commodore Amiga A600 extension - 8 MB of fast RAM.

phram\_1 is a Commodore Amiga A600 extension - 8 MB of fast RAM.

based on modern parts (CoolRunner CPLD, SDRAM) PCMCIA-friendly: holding reset for more than 3 seconds turns off high 4 MB current consumption around 110 mA speedup relative to stock A600: 33 % (by SysInfo) * successfully tested with CheckMem and MemCheck 1.2 (both available on Aminet).

cpld/ - MMU design files (Xilinx ISE 14.7)

Main components on the Phram 1

MC68000FN74LVX245XC2C256-TQ144AS4C4M16SAMCP1703A-1802/MBMCP1703A-3302/MB

Phram 1 bill of materials (BOM)

55 components, 16 distinct parts.

QtyPartRefs
1
MC68000FN
U1
6
74LVX245
U2, U3, U4, U6, U7, U8
1
XC2C256-TQ144
U9
1
AS4C4M16SA
U10
1
MCP1703A-1802/MB
U11
1
MCP1703A-3302/MB
U12
1
2N7002
Q1
1
TQSMT-35
X1
1
JTAG
P1
1
TEST
P2
2
CONN_01X01
P3, P4
1
PWR_LED
D1
4
1uF
C1, C2, C3, C4
25
100nF
C5, C6, C7, C8, C9, C10, C11, C12 +17
7
47k
R1, R2, R3, R4, R5, R6, R7
1
0
R8

Phram 1 design files

The KiCad project lives in the piotr-wiszowaty/phram_1 repository on GitHub; these links point at the commit this page was built from.

Phram 1: common questions

How big is the Phram 1 PCB?

The Phram 1 measures 100 × 66 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Phram 1?

55 components, from 16 distinct parts. The full bill of materials is listed on this page.

Where can I download the Phram 1 design files?

From the piotr-wiszowaty/phram_1 repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Phram 1 design in my own project?

Yes, under the terms of its GPL-3.0 license, which piotr-wiszowaty chose for the repository.

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