https://github.com/jbilander/reagnus

A drop-in replacement PCB for the Amiga Agnus chip
https://github.com/jbilander/reagnus

Last synced: 9 days ago
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A drop-in replacement PCB for the Amiga Agnus chip

• Host: GitHub
• URL: https://github.com/jbilander/reagnus
• Owner: jbilander
• License: cc-by-sa-4.0
• Created: 2021-03-26T09:42:59.000Z (over 3 years ago)
• Default Branch: main
• Last Pushed: 2024-11-20T18:31:49.000Z (about 1 month ago)
• Last Synced: 2024-11-20T19:33:28.074Z (about 1 month ago)
• Homepage:
• Size: 20.1 MB
• Stars: 82
• Watchers: 23
• Forks: 9
• Open Issues: 5
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# ReAgnus

A drop-in replacement PCB for the Amiga Agnus chip

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Rev. 2D, design using a [PLCC-84 homebrew plug](https://github.com/jbilander/PLCC-84-plug)


































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FPGA pin assignment:







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Rev. 2B, design using a PLCC-84-plug











































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When ordering from JLCPCB select:

Specify Layer Sequence: Yes

    L1(Top layer):    F_Cu.gbr

    L2(Inner layer1): GND_Cu.gbr

    L3(Inner layer2): VCC_Cu.gbr

    L4(Bottom layer): B_Cu.gbr

Remove Order Number: 

    Specify a location

This will notify JLC where to put the order number, they will replace the "JLCJLCJLCJLC" silkscreen label.

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Building Rev. 2B



























































































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REV 1A



















REV 1B































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BOM Rev. 2E (837X - Universal Agnus PCB design)

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Position  | Name/Value   | Package | Notes

-|-|-|-|

U1 | 10M04SCU169C8G | BGA-169 11.0x11.0mm_Layout13x13 | FPGA Intel MAX 10 [10M04SCU169C8G](https://www.mouser.com/ProductDetail/989-10M04SCU169C8G)

U2 | LM1117-3.3 | SOT-223 | Low-Dropout Linear Regulator 3.3 Volt

U3-U6 | SN74CBTD16210 | TSSOP-48 6.1x12.5mm_P0.5mm | 20-BIT FET Bus switch with level shifting, high-speed TTL-compatible. [74CBTD16210DGGR](https://www.mouser.com/ProductDetail/595-74CBTD16210DGGR)

U7 | 74LVC1G07 | 5-TSSOP, SC-70-5, SOT-353 (2.0 mm × 1.25mm) | [74LVC1G07](https://www.mouser.com/ProductDetail/621-74LVC1G07SE-7)

U8 | Winslow PLCC-84 Plug | PLCC-84 Plug | Optionally use a DIY-plug (stacked PCBs)

U9 | PLCC-84_TH_pin_holes | Agnus_TH_plug_pins | Pins that could be used with the DIY-plug rev1d PCBs for manual fitting, L8.7mm [Aliexpress](https://www.aliexpress.com/item/32893608810.html)

R1 | Resistor 4.7k or 10k Ω | 0603 | Pull-up resistor for PAL/NTSC selection for 8372 Agnus FPGA firmware/pinout

R2 | Resistor 4.7k or 10k Ω | 0603 | Pull-up resistor for pin 41 (PAL/NTSC-selector for A500 Rev.6A/A2000/A3000-pinout) since A500 Rev.6A doesn't have pull-up on motherboard like A2000/A3000/A3000T have. Only needed for A500 Rev.6A. but doesn't hurt to populate anyway.

RN1 | CAY16-103J4LF RES ARRAY 4 Resistors 10k Ω | 1206 | [CAY16-103J4LF](https://www.mouser.com/ProductDetail/652-CAY16-103J4LF)

RN2 | CAY16-103J4LF RES ARRAY 4 Resistors 10k Ω | 1206 | --"--

C1-3 | Capacitor 10uF | 1206 | 

C4,C5,C8,C11 | Capacitor 1uF | 0805 | 

C6,C7,C9,C10 | Capacitor 0.1uF = 100nF | 0805 | 

C12-C19 | Capacitor 0.01uF = 10nF | 0603 |

C20 | Capacitor 0.1uF = 100nF | 0603 |

C21-C24 | Capacitor 0.01uF = 10nF | 0603 |

JTAG | SMT Pin Header Male | SMT 2 x 5 Pin 2.0mm pitch |

***

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[Creative Commons Attribution-ShareAlike 4.0 International License][cc-by-sa].

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