Phantasy Star repro

[Released: 1985] One of the most unusual features of the Sega Master System is its dual media inputs: one cartridge slot and one card slot. The card slot accepted small cards about the size of a credit card.

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/markiiisystem
Bustin' Moves
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Phantasy Star repro

Post by /markiiisystem »

Image Hi, I´m trying to build a PS1 repro from an Afterburner pcb from tectoy (need to add sram chip,watchdog battery circuit, connection pads in the edge, etc).

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Here in reddit, some people builded themselves one, but i have one problem, all the datasheet I come across of ST 27c4001 have pin 22 & pin 24 swapped compared to the tutorial here. In the tut, they are:
Pin 22= GND
pin 24=CE
If I folow these instructions, but guided by datasheet, I will ground CE on the EPROM and ground CE on the 315-5235
So, connect the by tut or by datasheet?

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