PCB Labeled in copper A-1 SUPPLY,INC T.V. 21 III ASSY -510005 Intel D4289 2312A Intel D4040 2036A Intel D4201A 2334A Intel P4002-1 x2 (empty socket right next to these 2) .9 2716 looking chip (read as 1726 but top bits were always 1) S 7815 C27023M 750135 .42 82s141 .47 82s141 .41 similar looking to the 82s141 - this chips top popped off when moving the board around... some pins are no longer connected to the die... had Harris label PROM1-0512 -5B 7645 700119a .46 similar looking to the 82s141 - hand decoded from test vectors below had Harris label PROM1-0512 -5B 7633 700120 .51 similar looking to the 82s141 - hand decoded from test vectors below had Harris label PROM1-0512 -5B 7633 700118 .11 82s23n silkscreened 700124 .23 PROM1-8256 silkscreened 700117A read as 82s23 - pins 5,6,7, and 9 were not connected -5B 7644 pin 8 was ground, pin 16 was vcc pins 10,11,12,13 and 14 were connected to the other 82s23 proms .24 82s23n silkscreened 7500116A Noticed that the PCB trace shorted pin 10 to ground .25 82s23n silkscreened 7500115A .36 82s129 silkscreened 700122 .37 82s129 silkscreened 700121 .38 82s129 silkscreened 700123 .53 82s23n silkscreened 750029 Desoldered .51, but couldn't figure out what the chip was - everything returned continuity error or all 0xFF's From looking at the board, this is what I think the pin out is... 32x5? Pin 7 was always pulled high Outputs required pullups ---------------- NC |1 24|VCC NC |2 23|GND A0 |3 22|D0 A1 |4 21|D1 A2 |5 20|D2 CS |6 19|D3 CS?|7 18|D4 A3 |8 17|D5 A4 |9 16|NC A5 |10 15|NC GND|11 14|NC NC |12 13|GND ---------------- Used an ic tester with custom test vectors to read .51 and .46 - .51 top popped off during moving of the board. .tv21_51 24 FF00011000GFGFFFFLLLLLGV FF00011001GFGFFFFLLHHHGV FF00011010GFGFFFFLLHHHGV FF00011011GFGFFFFLLHHHGV FF00011100GFGFFFFLHHHHGV FF00011101GFGFFFFLLHHHGV FF00011110GFGFFFFLLHHHGV FF00011111GFGFFFFHHHHLGV FF00111000GFGFFFFHHHLLGV FF00111001GFGFFFFLLHHHGV FF00111010GFGFFFFLLHHHGV FF00111011GFGFFFFLLHHHGV FF00111100GFGFFFFLLHHHGV FF00111101GFGFFFFLLHHHGV FF00111110GFGFFFFLLHHHGV FF00111111GFGFFFFLLLLLGV FF01011000GFGFFFFLLLLLGV FF01011001GFGFFFFLLHHHGV FF01011010GFGFFFFLLHHHGV FF01011011GFGFFFFLLHHHGV FF01011100GFGFFFFLLHHHGV FF01011101GFGFFFFLLHHHGV FF01011110GFGFFFFLLHHHGV FF01011111GFGFFFFHHHLLGV FF01111000GFGFFFFHHHHLGV FF01111001GFGFFFFLLHHHGV FF01111010GFGFFFFLLHHHGV FF01111011GFGFFFFLLHHHGV FF01111100GFGFFFFLLHHHGV FF01111101GFGFFFFLLHHHGV FF01111110GFGFFFFLLHHHGV FF01111111GFGFFFFLLLLLGV FF10011000GFGFFFFLLLLLGV FF10011001GFGFFFFLLHHHGV FF10011010GFGFFFFLLHHHGV FF10011011GFGFFFFLLHHHGV FF10011100GFGFFFFLLHHHGV FF10011101GFGFFFFLLHHHGV FF10011110GFGFFFFLLHHHGV FF10011111GFGFFFFHHHHLGV FF10111000GFGFFFFHHHLLGV FF10111001GFGFFFFLLHHHGV FF10111010GFGFFFFLLHHHGV FF10111011GFGFFFFLLHHHGV FF10111100GFGFFFFLLHHHGV FF10111101GFGFFFFLLHHHGV FF10111110GFGFFFFLLHHHGV FF10111111GFGFFFFLLLLLGV FF11011000GFGFFFFLLLLLGV FF11011001GFGFFFFLLHHHGV FF11011010GFGFFFFLLHHHGV FF11011011GFGFFFFLLHHHGV FF11011100GFGFFFFLLHHHGV FF11011101GFGFFFFLLHHHGV FF11011110GFGFFFFLLHHHGV FF11011111GFGFFFFHHHLLGV FF11111000GFGFFFFHHHHLGV FF11111001GFGFFFFLLHHHGV FF11111010GFGFFFFLLHHHGV FF11111011GFGFFFFLHHHHGV FF11111100GFGFFFFLLHHHGV FF11111101GFGFFFFLLHHHGV FF11111110GFGFFFFLLHHHGV FF11111111GFGFFFFLLLLLGV .tv21_46 24 FF00011000GFGFFFFLLLLLGV FF00011001GFGFFFFHLLLLGV FF00011010GFGFFFFLLLLLGV FF00011011GFGFFFFLLLLLGV FF00011100GFGFFFFLLLLLGV FF00011101GFGFFFFHHLLLGV FF00011110GFGFFFFLHLLLGV FF00011111GFGFFFFLLLLLGV FF00111000GFGFFFFLLLLLGV FF00111001GFGFFFFHLHLLGV FF00111010GFGFFFFLLHLLGV FF00111011GFGFFFFLLLLLGV FF00111100GFGFFFFLLLLLGV FF00111101GFGFFFFHHHLLGV FF00111110GFGFFFFLHHLLGV FF00111111GFGFFFFLLLLLGV FF01011000GFGFFFFLLLLLGV FF01011001GFGFFFFHLLHLGV FF01011010GFGFFFFLLLHLGV FF01011011GFGFFFFLLLLLGV FF01011100GFGFFFFLLLLLGV FF01011101GFGFFFFHHLHLGV FF01011110GFGFFFFLHLHLGV FF01011111GFGFFFFLLLLLGV FF01111000GFGFFFFLLLLLGV FF01111001GFGFFFFHLHHLGV FF01111010GFGFFFFLLHHLGV FF01111011GFGFFFFLLLLLGV FF01111100GFGFFFFLLLLLGV FF01111101GFGFFFFHHHHLGV FF01111110GFGFFFFLHHHLGV FF01111111GFGFFFFLLLLLGV FF10011000GFGFFFFLLLLLGV FF10011001GFGFFFFHLLLHGV FF10011010GFGFFFFLLLLHGV FF10011011GFGFFFFLLLLLGV FF10011100GFGFFFFLLLLLGV FF10011101GFGFFFFHHLLHGV FF10011110GFGFFFFLHLLHGV FF10011111GFGFFFFLLLLLGV FF10111000GFGFFFFLLLLLGV FF10111001GFGFFFFHLHLHGV FF10111010GFGFFFFLLHLHGV FF10111011GFGFFFFLLLLLGV FF10111100GFGFFFFLLLLLGV FF10111101GFGFFFFHHHLHGV FF10111110GFGFFFFLHHLHGV FF10111111GFGFFFFLLLLLGV FF11011000GFGFFFFLLLLLGV FF11011001GFGFFFFHLLHHGV FF11011010GFGFFFFLLLHHGV FF11011011GFGFFFFLLLLLGV FF11011100GFGFFFFLLLLLGV FF11011101GFGFFFFHHLHHGV FF11011110GFGFFFFLHLHHGV FF11011111GFGFFFFLLLLLGV FF11111000GFGFFFFLLLLLGV FF11111001GFGFFFFHLHHHGV FF11111010GFGFFFFLLHHHGV FF11111011GFGFFFFLLLLLGV FF11111100GFGFFFFLLLLLGV FF11111101GFGFFFFHHHHHGV FF11111110GFGFFFFLHHHHGV FF11111111GFGFFFFLLLLLGV Mame 0.241 C:\Siftware\roms>c:\games\mame_command\mame -romident E:\qnap\softwarethis\arcade\boards\tv21\roms\tv21.9 Identifying E:\qnap\softwarethis\arcade\boards\tv21\roms\tv21.9.... tv21.9 = 750135.9 tv21_3 T.V. 21 III C:\Siftware\roms>c:\games\mame_command\mame -romident E:\qnap\softwarethis\arcade\boards\tv21\roms\tv21.11 Identifying E:\qnap\softwarethis\arcade\boards\tv21\roms\tv21.11.... tv21.11 = 90902100.20 tvpoker T.V. Poker C:\Siftware\roms>c:\games\mame_command\mame -romident E:\qnap\softwarethis\arcade\boards\tv21\roms\tv21.23 Identifying E:\qnap\softwarethis\arcade\boards\tv21\roms\tv21.23.... tv21.23 NO MATCH C:\Siftware\roms>c:\games\mame_command\mame -romident E:\qnap\softwarethis\arcade\boards\tv21\roms\tv21.24 Identifying E:\qnap\softwarethis\arcade\boards\tv21\roms\tv21.24.... tv21.24 NO MATCH C:\Siftware\roms>c:\games\mame_command\mame -romident E:\qnap\softwarethis\arcade\boards\tv21\roms\tv21.25 Identifying E:\qnap\softwarethis\arcade\boards\tv21\roms\tv21.25.... tv21.25 NO MATCH C:\Siftware\roms>c:\games\mame_command\mame -romident E:\qnap\softwarethis\arcade\boards\tv21\roms\tv21.36 Identifying E:\qnap\softwarethis\arcade\boards\tv21\roms\tv21.36.... tv21.36 NO MATCH C:\Siftware\roms>c:\games\mame_command\mame -romident E:\qnap\softwarethis\arcade\boards\tv21\roms\tv21.37 Identifying E:\qnap\softwarethis\arcade\boards\tv21\roms\tv21.37.... tv21.37 NO MATCH C:\Siftware\roms>c:\games\mame_command\mame -romident E:\qnap\softwarethis\arcade\boards\tv21\roms\tv21.38 Identifying E:\qnap\softwarethis\arcade\boards\tv21\roms\tv21.38.... tv21.38 NO MATCH C:\Siftware\roms>c:\games\mame_command\mame -romident E:\qnap\softwarethis\arcade\boards\tv21\roms\tv21.42 Identifying E:\qnap\softwarethis\arcade\boards\tv21\roms\tv21.42.... tv21.42 = 750030.42 tv21_3 T.V. 21 III C:\Siftware\roms>c:\games\mame_command\mame -romident E:\qnap\softwarethis\arcade\boards\tv21\roms\tv21.47 Identifying E:\qnap\softwarethis\arcade\boards\tv21\roms\tv21.47.... tv21.47 = 750026a.47 tv21_3 T.V. 21 III C:\Siftware\roms>c:\games\mame_command\mame -romident E:\qnap\softwarethis\arcade\boards\tv21\roms\tv21.53 Identifying E:\qnap\softwarethis\arcade\boards\tv21\roms\tv21.53.... tv21.53 = 90204100.69 tvpoker T.V. Poker