Amiga Flash Adapter from AMIGAWORLD.DE

[CrashSerious]

I recently had several of these (https://www.amigaworld.de/hardware/flash-rom-adapter/) made and bought all the parts needed. I can't seem to get it to write and I was thinking maybe the jumpers need to be set somehow...

Has anyone built these and figured out what the jumpers 1-4 are for? The documentation is a bit lacking in this area.

 

[torsti76]

The design seems to be similar to the F2R16 adapters made by gglabs (https://gglabs.us).

For the F2R16, there are 4(5) pins broken out that are necessary to write to the flash and read the upper 512k if a 29F800 is used.

The pins are:

A18 - address line for the upper 512k
_WE - write enable
_RST - reset
_BSY - busy signal (only on newest revision)

The 5th pin is a GND pin.

I'd make a wild guess that Matthias did route the former 4 pins to the "jumper".

To write to the 29Fx00, A18, _WE, and _RST need to be triggered at certain times during the flash. gglabs provides an Adapter (F2R16-Prog) that plugs on top of the TSOP48 adapter for the Minipro TL866 Eprommer and uses all three signals to burn 1MB into a 29F800 equipped F2R16 in one go.
I'd suspect you need something similar...

 

[CrashSerious]

Your message got me thinking, so I just traced it out and reviewed the Gerber files. The pins are as follows on a AM29F400BB:

1 - 11 (WE#)
2 - 12 (RESET#)
3 - 16 (NC)
4 - Gnd

There's no A18 though, and the No Connection pin has me a bit baffled.

The design seems to be similar to the F2R16 adapters made by gglabs (https://gglabs.us).

For the F2R16, there are 4(5) pins broken out that are necessary to write to the flash and read the upper 512k if a 29F800 is used.

The pins are:

A18 - address line for the upper 512k
_WE - write enable
_RST - reset
_BSY - busy signal (only on newest revision)

The 5th pin is a GND pin.

I'd make a wild guess that Matthias did route the former 4 pins to the "jumper".

To write to the 29Fx00, A18, _WE, and _RST need to be triggered at certain times during the flash. gglabs provides an Adapter (F2R16-Prog) that plugs on top of the TSOP48 adapter for the Minipro TL866 Eprommer and uses all three signals to burn 1MB into a 29F800 equipped F2R16 in one go.
I'd suspect you need something similar...

 

[torsti76]

Sorry, I've been unclear about A18, probably because I always use 29F800.

On the 29F400, there is no A18 (address line 18), because it only has 512k.

You can leave the pin disconnected, but you have to have _WE and _RST play along while writing to the chip.

 

[CrashSerious]

Makes sense, I'd bet Pin 16 is A18 on the "800" then.

I'm going to have to figure out where to get a adapter, gglabs appears to be on vaccation for a couple weeks.

Sorry, I've been unclear about A18, probably because I always use 29F800.

On the 29F400, there is no A18 (address line 18), because it only has 512k.

You can leave the pin disconnected, but you have to have _WE and _RST play along while writing to the chip.

 

[torsti76]

Makes sense, I'd bet Pin 16 is A18 on the "800" then.

I've just had a look at the datasheet and may tell you that you won the bet!

 

[8 Bit Dreams]

You need to program the chip before soldering it on, or use an adapter if You wanna flash it afterwards
https://gglabs.us/node/2026