"The TC5332204 mask ROMs have a similar pinout to the 27C322 EPROMs. The only difference is that they're set to byte mode only: half of the data output pins are unused. Pin 30 (Q15) is used as the address lowest bit."
And that while the 27C322 are 16-bits mode only, the TC5332204 are used in 8-bit mode.
Maybe you are right, i can try to read them as 27C160 that are 8-bits mode compatible.
When searching online, I've have found the following way to copy the content of the rom which required some tricks for the reading and then a rebuilt of the rom. This could work for me at the end if there is not other solution but as i just want read/check the rom i would be more than happy to spare that procedure.
" 1-Connect Pin 30 (Q15) and Pin 22 (Vcc) with a test lead. Then dump as M27C322 to a file v1_vcc.bin 2-Move test lead to connect Pin 30 (Q15) and Pin 12 (GND) instead. Then dump as 27C322 to a file v1_gnd.bin 3-romwak_x64.exe /b v1_vcc.bin split1 split2 4-romwak_x64.exe /b v1_gnd.bin split3 split4 5romwak_x64.exe /m split3 split1 v1.bin "
I'm wondering if reproducing the same procedure when using M27C160 instead of MC27C322 coud allow to spare points 3- and 4- ?
The idea was to add a few options (jumpers) for reading Toshiba TC533204AP (32Mo, 8bit) and TC5364205AP (64Mo, 16bit) maskroms to make it easier to repair old video games.
Here is the link to get the files and infos about the customized adaptors.
How to read Toshiba TC5332204 maskroms?
Posted - 05/03/2020 : 09:37:24
