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► Presentation
This backup unit let you save to floppy a cartridge and then load it later in memory (without the cartridge)
All the roms you could find over the net come from this kind of unit.
The DPF can backup Genesis and SFC games.
A friend lets me use his DPF to test my demos.
Unfortunaly, in storage for a long time, it didn't work.
I so opened it to repair it.
I wasn't too long, I apply the remove-replace chips method.
I think a capacitor (C38) is bad because I'm unable to play a cartridge directly.
By the way, this is what I found while trying to repair it.
Please note I no longer got it : I acquired a SMD so I gave it back to my friend.
► Components
Quantity |
Number |
Description |
Datasheet |
6 |
HYB 514800AJ-60 |
4M Ram (512kb*8) - 60ns (on the ram board) |
|
3 |
SN74LS245N |
Octal bus |
 |
1 |
GM76C28A-10 |
16k SRAM (8kb*2) |
|
1 |
M5M5256FP-154 |
256k SRAM (32kb*8) |
|
1 |
M5L27512K |
Eprom 512k |
|
1 |
74LS13 |
Dual 4 input NAND |
|
2 |
74HC139N |
Dual 2->4 decoder |
|
1 |
PALCE20V8H-25PC/4 |
Flash CMOS 20 input 25ns |
|
2 |
PALCE16V8H-25PC/4 |
Flash CMOS 16input 25ns |
1 |
GM82C765B |
Floppy disk controler |
|
1 |
EP1810LC-45 |
FPGA (?) |
|
1 |
74HC00AP |
Quad 2 input NAND |
|
1 |
AN7805 |
5V regulator |
|
1 |
|
16KHz clock |
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► Inside
Front
 zoom
(400k)
Back (with floppy drive)
Ram board
 zoom (300k)
Genny Cart adaptator
► Links
DPF Bios info (in japanese)
 Qjimbo dumper workshop, with bios dump (mirror)
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