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| Edge Con | Decoder | Signal | OTP EPROM | 1M RAM | 1M Flash | |
|---|---|---|---|---|---|---|
| 30 | 1 | SE1 | EXISTING CONNECTION | |||
| 38 | 2 | A19 | EXISTING CONNECTION | |||
| 37 | 3 | A18 | ||||
| 7 | 14 | OTP CE | 22 | RH 512K LK | RH 512K LK | |
| 11 | RAM CE | RH RAM LK | ||||
| 11 | FLASH CE | LH RAM LK | ||||
256K OTP EPROM 768 RAM Modifications follows
| Pin | Pin | Pin | Pin | Pin | Instructions | ||
|---|---|---|---|---|---|---|---|
| Reinstate POE/ROE mods they are no longer needed. | |||||||
| U4 | 3 | 4 | 5 | 14 | 15 | Lift up pins DO NOT CONNECT TO PCB |
| U4 | 1 | 2 | 6-8 | 9-13 | 16 | Solder chip to board using the remaining pins |
| U4 | 3 | A18 - Connect wire from Pin 3 | ||||
| U1 | to via near 1 U1 | |||||
| U4 | 7 | 14 | Connect wire from Pin 7, 14 to RH pad of 512K | |||
| U4 | 11 | Connect to RH pad of RAM NOTE: This is for the RAM. | ||||
| U3 | Fit socket for U3 | |||||
| U3 | 1 | Cut track (A18) | ||||
| U3 | 1 | Connect to Vpp Edge connector Pin 19 | ||||
| LK1 - LK2 |
256K OTP EPROM 768 FLASH Modifications follow
| Pin | Pin | Pin | Pin | Pin | Instructions | ||
|---|---|---|---|---|---|---|---|
| Reinstate POE/ROE mods they are no longer needed. | |||||||
| U4 | 3 | 4 | 5 | 14 | 15 | Lift up pins DO NOT CONNECT TO PCB |
| U4 | 1 | 2 | 6-8 | 9-13 | 16 | Solder chip to board using the remaining pins |
| U4 | 3 | A18 - Connect wire to | ||||
| U1 | via near 1 U1 | |||||
| U4 | 7 | 14 | Connect to RH pad of 512K | |||
| U4 | 11 | Connect to LH pad of RAM | ||||
| LK1 - LK2 | Cut track between LH pad of 512 and LH pad of RAM | |||||
| U3 | Fit socket for U3 | |||||
| U3 | 1 | Cut track (A18) | ||||
| U3 | 1 | Connect to Vpp Edge connector Pin 19 |
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