Sound/speech board PROM and clock jumpers
Apart from E1-E3 and E16-E18, the solid jumpers on the schematic are for 2716 PROMs and the dashed ones for 2732 PROMs. E16 to E17 sets a 1 MHz clock and E16 to E18 a 2 MHz clock. Check these when fitting different EPROMs.
Systems
Related tips
- Sound/speech board adjustments and test button
- Sometimes boots with a long tone and no sound: failed 6532 RIOT on the sound board
- Replace C33 on the speech and sound board
- Fitting the original sound board PROM
- Sound/speech power supply MA-149 parts
- Ground mod step 7: sound/speech power supply ground
- No sound at all
- Distorted sound
Source: System 80 Service Manual, Gottlieb