x68000:polyphon_-_fpu_midi_pcm_8mb_memory_board
POLYPHON - FPU, MIDI, PCM, 8MB memory board
The Polyphon board allows using optional FPU, MIDI, acts as a hardware PCM accelerator, with the help of PCM8SB.X driver, and can be used as an 8MB (2x4MB) RAM expansion board.
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- GAL and EPROM ROM dumps were kindly provided by our forum member Hyperneogeo
- Dipswitch settings were taken from: http://www.tur-up.net/~ta/x68k/poly_dip.html
- Polyphon Hires picture was found by our forum member AnnaWu
Dipswitch settings
| SW | Settings | ON | OFF |
| 1 | Memory address $200000-$3FFFFF | Enabled | Disabled |
| 2 | Memory address $400000-$5FFFFF | Enabled | Disabled |
| 3 | Memory address $600000-$7FFFFF | Enabled | Disabled |
| 4 | Memory address $800000-$9FFFFF | Enabled | Disabled |
| 5 | Memory address $A00000-$BFFFFF | Enabled | Disabled |
| 6 | Math processor I / O address | $E9E080-$E9E09F | $E9E000-$E9E01F |
| 7 | POLYPHON ID | $EFF880-$EFF89F | $EFF800-$EFF89F |
| 8 | Unused |
Additional memory settings [0=OFF/1=ON]
| Existing memory | + 2MB expansion | + 4MB expansion | + 6MB expansion | + 8MB expansion |
| 10MB | 0 0 0 0 1 | Invalid | Invalid | Invalid |
| 8MB | 0 0 0 1 0 | 0 0 0 1 1 | Invalid | Invalid |
| 6MB | 0 0 1 0 0 | 0 0 1 1 0 | 0 0 1 1 1 | Invalid |
| 4MB | 0 1 0 0 0 | 0 1 1 0 0 | 0 1 1 1 0 | 0 1 1 1 1 |
| 2MB | 1 0 0 0 0 | 1 1 0 0 0 | 1 1 1 0 0 | 1 1 1 1 0 |
| SW Nr. | 1 2 3 4 5 | 1 2 3 4 5 | 1 2 3 4 5 | 1 2 3 4 5 |
x68000/polyphon_-_fpu_midi_pcm_8mb_memory_board.txt · Last modified: 2019/08/27 20:45 by 127.0.0.1