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Ice Man
32 Posts |
 Posted - 12/15/2017 : 05:43:28
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Will there be support for this IC in the future?
GQ-4X can program MX29L3211 already and the only difference is that MX26L6420 got A21 and instead of BYTE it is WE.
So maybe it's already possible with ADP-019 V4 and higher? |
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| Reply #1
anniel
2572 Posts |
Posted - 12/15/2017 : 08:47:11
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quote:
Originally posted by Ice Man
Will there be support for this IC in the future?
GQ-4X can program MX29L3211 already and the only difference is that MX26L6420 got A21 and instead of BYTE it is WE.
So maybe it's already possible with ADP-019 V4 and higher?
Not the same technology at all.
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| Reply #2
Ice Man
32 Posts |
Posted - 12/18/2017 : 06:39:49
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| Because it only use 16 bit mode? ADP-019 programm in 8 bit mode I assume? |
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| Reply #3
anniel
2572 Posts |
Posted - 12/18/2017 : 07:21:03
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quote:
Originally posted by Ice Man
Because it only use 16 bit mode? ADP-019 programm in 8 bit mode I assume?
No, mainly because it's not in the same family of chips.
MX29 is a FLASH EEPROM an can be accessed by sectors or pages and supports 10000 cycles.
MX26 is more like a conventional EPROM and only supports 100 erase/program cycles. |
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| Reply #4
Ice Man
32 Posts |
Posted - 12/18/2017 : 08:50:56
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| Oh, I see. Any chance it can be added to support list though? |
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| Reply #5
anniel
2572 Posts |
Posted - 12/18/2017 : 10:10:11
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quote:
Originally posted by Ice Man
Oh, I see. Any chance it can be added to support list though?
Probably...
ZLM?
Datasheet is attached.
Download Attachment: 
671492 |
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| Reply #6
snakeGrave
USA
1 Posts |
Posted - 03/13/2022 : 09:52:11
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I modified my programmer so that I can read 64MB chips in two parts. by manually connecting A21 to either VCC of GND through a resistor using the MX29L3211MC*PSOP44 device. My hope is that I would be able to program my chips in two parts in the same way, split my 8MB file, write the first 4MB with a21 tied to gnd, then write the last 4MB with A21 tied to VCC.
I have also rewired the write enable pin to position 4 on J2.
J3 jumper is configured to 5V
J1 jumpers are setup for 29L3211 chips
But when I try to program my 26L6420MC-90 chips the status bar hangs at 0% forever.
I am trying to replace the 64Mb read only chips on my board with new chips. I am able to confirm that I have read the content from these chips because I can compare the read data to content that I have found on the internet.
Thank you! |
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| Reply #7
Ptchnk
France
6 Posts |
Posted - 05/24/2022 : 02:30:53
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Besides the pinout that is not that different (see pinout below), the main problem would be that MX29L3211MC are flash memory while MX26LXXX are not so the writing protocole might be different.
As your are able to read the 64Mb rom by manually setting the low/high byte, my guess is that you should be able to read it in one pass by creating a custom rom model in the "device.txt" file (doubling the size of the MX29L3211MC*PSOP44 device for instance) and by connecting A21 (pin 1) from the rom to the A22 position on the ZIF connector.
It worked for me to read the TC5364205AP DIP42 maskrom in one pass. And i may made it work for the MX26LXXX in read mode only.
For the writing, as MX26LXXX are not flash rom, i would make a custom device derived form the 27C322 type eprom. But that would probably required some adjustement of the voltage unless it is taking cared of byt he adaptor.
Name="27C322",ID="XXXX",Class="27C322",Category="EPROM",MFG="ALL(Generic)",CodeSize="4194304",Adapter="ADP-054, ADP-055 16 BIT EPROM ADAPTER";
Name="TC5364205AP",ID="XXXX",Class="27C322",Category="EPROM",MFG="ALL(Generic)",CodeSize="8388608",Adapter="ADP-054, ADP-055 16 BIT EPROM ADAPTER";
I was actually working one a similar issue a couple years back by trying to make a versatile adaptor tor read (and write) various DIP40/42 and PSOP44 roms but it is still a WIP. Only the DIP40/42 side is working at the moment.
https://www.ultimate-consoles.fr/topic/19983-tuto-lire-les-maskroms-tc5332204ap-tc5364205ap-et-tc531000/
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Edited by - Ptchnk on 05/24/2022 04:12:02 |
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Topic |
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MX26L6420?
