GottaGoFastRAM200 8MB Autoconfig Fast RAM

This is an 8MB Autoconfig Fast RAM for the Amiga 2000

Special thanks to GadgetUK164 and sparxUK for their help testing this.

Table of contents

1. Status
2. Features
3. PCB Ordering
4. Jumpers
5. Bill of materials
6. Troubleshooting

Status

This is tested and working

Features

• 8MB of Fast RAM
• Auto-sizing - The RAM board will coexist with other devices by autosizing to fit the remaining free Zorro II memory space

PCB Ordering

For best results the boards should be manufactured with the "Gold Fingers" option so that the edge connector will survive many insertion/removal cycles

Jumpers

4MB: Forces the board to appear as a 4MB board rather than 8MB

Bill of materials

Component	Location	QTY	Link	Note
LM1117-3.3 SOT-223	U1	1	Mouser
XC9572XL-10TQ100C	U5	1	Mouser
74LS245 SOIC	U3,U4	2	Mouser
74LVC2G07	U2	1	Mouser	*Optional - See below
5v 1MBx16 DRAM, SOJ-42 i.e K4E151611, MT4C1M16E5 etc.	U6,U7,U8,U9	4	Aliexpress, Ebay etc
0.1uF Ceramic capacitor, 0805	C4-25	22	Mouser
10uF Ceramic capacitor, 1206	C2,C3	2	Mouser
100uF Electrolytic Capacitor	C1	1	Mouser
10K Resistor, 0805	R1	1	Mouser

* U2 buffers the cards generated DTACK and OVR signals - In a pinch this can be left out but you will run into problems with the A2091 and some other devices so it is best to fit this and save yourself the headache

Troubleshooting

• Symptom: System does not boot, the power LED does not change brightness
  Solution: Possible incorrect orientation/faulty ic in U2 - check orientation and/or remove this IC and try again