Thanks for the feedback. Interesting regarding the hotswap.. which version of xflash were you using when the hotswap worked okay? Also, when you say hotswap are you hot swapping the ROM or the whole cartridge? I haven't actually changed any of the core code, just added some flash part in and an extr...

No worries, I will leave it be.

If you get any carts that show "UNKNOWN FLASH", can you let me know the ID numbers it reports and what model flash it is? I can look to getting extra carts added (would be a great help).

So with the 39SF chips I seem to remember it using more address lines for write commands then the older chips. I found a thread on nesdev where it was discussed a little. https://forums.nesdev.com/viewtopic.php?f=9&t=16029 Not sure that is helpful. Thanks for this, very helpful indeed.. helps under...

Hi, Thanks for the info, will double check the datasheet and have a read. Very helpful Update: Just got a clone AR cart that wasnt detected in Xflash - It has a Sanyo branded LE28C1001T. Interestingly Sanyo branded flash parts are just SST.. so usually use the SST Manufacturer/Part ID's.. this one d...

I doubt if it would work on a standard AR cart, think the internal/external bit isnt the issue but the rest of the missing hardware perhaps..

The VCD card doesnt use a simple PAL on this one, it has a Lattice CPLD.. so that might be doing some magic that the menu expects?

As promised, find attached the attempt to flash the 39SF020.. Writes something every 100h bytes.. so its trying at least. Have also added the source and compiled EXE.. I have added the definitions in for SST39SF020(256k) and the AMD Am29F040 (512k). Literally emptied the garage looking for 28/29 ser...

Had a look after the failed write,, seems that it writes one byte per 100h bytes... Ill post the files for comparison later. Tried with different page sizes and that didnt work.

Looks like it might be worth looking at the SST 28SF040, as it supports byte write and sector erase (possibly similar to the flash operation of the 39F020. Investigation continues :-) Will work on pushing this to github tonight. Will keep the versioning the same but this can become v1.2 b6 as it has...

Thanks Shadow. I am working on getting something working in ROM still (hence all my other posts), but one thing I would really like to get working is binary file upload (helpful for Yaroze). Doesnt look like psxserial supports it, but I noticed that the serial part UniROM v6 does.. its is just undoc...

Ahaaa,, amazing what you find when you read things correctly... So in the datasheet for the 29EE020 :- • Fast Page-Write Operation – 128 Bytes per Page, 2048 Pages – Page-Write Cycle: 5 ms (typical) – Complete Memory Rewrite: 10 sec (typical) – Effective Byte-Write Cycle Time: 39 µs (typical) So 262...

Think we do need to update it, completely open of course. Had a further play with this. Modded an old EMS AR clone and added a ZIF slot to make life easier. Then tried a SST39SF020A in a PLCC32 adapter. Pre-flashed it with Caetla 0.38 and loaded my modified code into the memory card. The flasher wor...

Backup of the GAMARS VCD Cart for the 900x series. May work on other models like the external version.
Cant see another ROM on there, so assume it contains both the cheat/vcd software. Might be of use if you have flashed over one with caetla etc..

Perfect

Ill get this wired up and post back. Thanks again for the help

Just another one on this, have this almost fully wired into the console... where would I connect /WR to from the flashrom? i have looked at some of the cheat cart schematics and they all show it running from the PAL/GAL.. is that just the RW pin on the parallel port? It must be possible as that simp...

Alternate points for bios lines... crap diagram but you should get the idea.. numbers are the corresponding pins on BIOS rom. CE is CPU pin 98.##

Hi Lameguy, I am looking at supporting your loader in my python client, so I can try and see if it is compatible with my wireless project and make it a multipurpose tool, but am struggling to work something out. Having looked at your protocol and the source code for mcomms i still cant work it out (...

Could it be part of the flash interface of the memory card? That would explain why you would never see it as the interface MCU on the memory card handles it so the console doesnt need to worry about it.

At the moment I am trying to flash it using a cheat cart and I am struggling to get Xflash to pick up the correct manufacturer/device ID as per their datasheets. Looking through my parts bin I only have 39Fxxx, a few Am29F040 and only 1 ST29F020. Did you try using nocash's flasher ? And following t...

Indeed they do, although think its slightly modified so it supports the CD stop function. I had two of those very cards, still have one left over, It comes with a IC102 BIOS rom piggyback cable, gets its power directly from the PSU and then there are three wires that connect to various places. If yo...

Just ordered a TL866II+ programmer to get my on my way. Ill program one up and see if the console will run it. At the moment I am trying to flash it using a cheat cart and I am struggling to get Xflash to pick up the correct manufacturer/device ID as per their datasheets. Looking through my parts bi...