This is a recreation of the Tokamac LC accelerator. Sonnet sold the same board as the Presto 040. Supported Macs are the LC, LCII and Color Classic and their Performa variants. The schematics have been reverse engineered and a new PCB was created based on the schematics.
The provided PCB files are licensed under CC-BY-NC-SA - they are NOT intended for commercial use.
The only programmable part on this accelerator is a XC1736 PROM at U15 that holds the configuration for the XC3030 FPGA. Reset polarity should be set to high when programming the ROM.
The provided gerber files have been generated using the JLCPCB EAGLE cam job files.
| Part | Value | Package |
|---|---|---|
| AR1 | 100 | R1206 |
| AR2 | 100 | R1206 |
| C1 | 100nF | C1206 |
| C2 | 100nF | C1206 |
| C3 | 100nF | C1206 |
| C4 | 100nF | C1206 |
| C5 | 100nF | C1206 |
| C6 | 100nF | C1206 |
| C7 | 100nF | C1206 |
| C8 | 100nF | C1206 |
| C9 | 100nF | C1206 |
| C10 | 100nF | C1206 |
| C11 | 100nF | C1206 |
| C12 | 100nF | C1206 |
| C13 | 100nF | C1206 |
| C14 | 100nF | C1206 |
| C15 | 100nF | C1206 |
| C16 | 100nF | C1206 |
| C17 | 100nF | C1206 |
| C18 | 100nF | C1206 |
| C19 | 100nF | C1206 |
| C20 | 100nF | C1206 |
| C21 | 100nF | C1206 |
| C22 | 100nF | C1206 |
| C23 | 100nF | C1206 |
| C24 | 100nF | C1206 |
| C25 | 100nF | C1206 |
| C26 | 100nF | C1206 |
| C27 | 100nF | C1206 |
| C28 | 100nF | C1206 |
| C29 | 100nF | C1206 |
| C30 | 100nF | C1206 |
| C31 | 100nF | C1206 |
| C32 | 10uF/10V | C/6032 |
| C33 | 10uF/10V | C/6032 |
| C34 | 10uF/10V | C/6032 |
| K1 | DIN41612 96pin | |
| L1 | 220uH | L1812 |
| L2 | 220uH | L1812 |
| QG1 | 50MHz 5V oscillator | DIL14S |
| R1 | 10k | R1206 |
| R2 | 10k | R1206 |
| R3 | 10k | R1206 |
| R4 | 10k | R1206 |
| R5 | 10k | R1206 |
| R6 | 10k | R1206 |
| R7 | 10k | R1206 |
| R8 | 10k | R1206 |
| R9 | 10k | R1206 |
| R10 | 10k | R1206 |
| R11 | 1M | R1206 |
| R12 | 1k | R1206 |
| R13 | 10k | R1206 |
| R14 | 10k | R1206 |
| R18 | 62 (22-82) | R1206 |
| R19 | 62 (22-82) | R1206 |
| U1 | 68040RC25 | PGA179 |
| U2 | 74FCT244 | SO20W |
| U3 | 74ACT374 | SO20W |
| U4 | 74ACT374 | SO20W |
| U5 | 74ACT244 | SO20W |
| U6 | 74FCT521 | SO20W |
| U7 | 74F125D | SO14 |
| U8 | 74ACT244DW | SO20W |
| U9 | 74ACT244DW | SO20W |
| U10 | 74ACT244DW | SO20W |
| U11 | XC3030-100 | QFP-100 |
| U13 | 74ACT04D | SO14 |
| U14 | 74ACT74D | SO14 |
| U15 | XC1736 | DIL8 |
| U16 | MC88915 | PLCC-28 |
| U17 | 74F00D | SO14 |