Xgecu T48 Eprom Adapter for 27C400/800/160/322
It concerns the completely finished adapter including 48 pin ZIF Socket, not just the PCB
The eprom programming adapter will support 27C322 (4Mx8-bit), 27C160 (2Mx8-bit), 27C800 (1Mx8-bit) 27C400 (512kx8-bit).
This adapter converts the mask- (E)EPROM pinouts of the above parts to the JEDEC pinout of 27C4096 EPROMs (as supported by T48 USB programmer, and possibly other cheap programmers too).
The T48 programmer is supported through its MiniPro software by selecting '27C4096' device and disabling 'Check ID'. You may also like to reduce VPP Voltage to 12.50V (check your device data sheet).
Xgecu T48 Eprom Adapter for 27C400/800/160/322) for the T48 Eprom Programmer
Since the T48 has only a 40-pin programming socket, the extra address pins on 27C800 27C160 are configured manually on the Eprom Adapter via a digital rotary encoder
27C400 : any setting will do
27C800 : program in 2 x 512kB passes: A18=0 (bank 1), then A18=1 (bank 2)
27C160 : program in 4 x 512kB passes: A19/A18=0, 1, 2, 3 (banks 1, 2, 3, 4)
27C322 : program in 8 x 512kB passes: A20/A19/A18=0, 1, 2, 3, 4, 5, 6, 7 (banks 1,2,3,4,5,6,7,8)
Since 27C322 is a slightly different pin-out to the other devices, there is a switch which must be set
(To be used only for 27C322 devices).
Xgecu T48 Eprom Adapter for 27C400/800/160/322) Credits
The design is heavily based on the TL866II adapter designed by Keir Fraser.
Changed the layout so it would fit the Xgecu T48, and switched to throughole parts for the most.