The only masked ROM I have found that is 128k and 28pins is: (1M) 128k x 8 mask rom (TC531000)
A15 1 +-v-+ 28 Vdd A12 2 | | 27 A14 A7 3 | | 26 A13 A6 4 | | 25 A8 A5 5 | | 24 A9 A4 6 | | 23 A11 A3 7 | | 22 A16 A2 8 | | 21 A10 A1 9 | | 20 CE/ A0 10 | | 19 D7 D0 11 | | 18 D6 D1 12 | | 17 D5 D2 13 | | 16 D4 GND 14 +---+ 15 D3 Keep in mind this is a total guess based on very little information. Kurt -----Original Message----- From: M100 [mailto:[email protected]] On Behalf Of Stephen Adolph Sent: Friday, February 17, 2017 5:27 PM To: Model 100 Discussion <[email protected]> Subject: Re: [M100] Parts for an NEC PC-8300 VT simulates it with 4 rom banks. so, .. it must be 128kB. I just have no idea what the pin assignment on a 28 pin socket could be. .Steve
