Thanks again, RB!
I've uploaded the archive (Do-Do), and here's what I had so far:


Code
ROM_START(dodo)
	ROM_REGION(0x2000,"gfx1", 0)
	ROM_LOAD( "gtac_2_charrom_um2316_a5.bin", 0x0000, 0x0800, CRC(a2dfcfeb) SHA1(adea922f950667d3b24297d2f64de697c28d6c17) )

	ROM_REGION( 0x1000, "keyboard", ROMREGION_ERASE00 )
	ROM_LOAD( "nfl-asem-am100-keyboard-u5.bin", 0x0000, 0x0800, CRC(28f5ea38) SHA1(9f24c54f7cee41f7fef41294f05c4bc89d65acfb) ) // borrowed from the am100

	ROM_REGION(0x4000, "maincpu",0)
	ROM_LOAD( "dodo2764.bin", 0x2000, 0x1000, CRC(4b761f87) SHA1(2e1741db8134c4c715ecae480f5bda51d58ae296) )
	ROM_CONTINUE(0x1000, 0x1000)
	ROM_LOAD( "dodo2732.bin", 0x3000, 0x1000, CRC(405cdb0c) SHA1(3ed133eb94ee33194c668c4ee3f67885dd489d13) )
ROM_END

Code
COMP( 198?, dodo,     apple2, 0,      apple2p,  apple2p, apple2_state, empty_init, "GTAC",                "Do-Do",     MACHINE_SUPPORTS_SAVE )

NCR DMV- DEC Rainbow- Siemens PCD- ITT 3030-Oly People- Acorn A5000- Olivetti M20