12 Nov
2005
12 Nov
'05
7:06 a.m.
On 11/11/2005 at 11:12 PM woodelf wrote:
PS. As for getting 7400 off scrap boards, if I had
the scrap boards I
would most likely try to get the scrap item working again. :D
There are plenty of junk boards that have no particular useful function.
I've got a bunch of ISA cards that I salvaged. All were old models of a
gizmo that appeared to a PC as a monochrome adapter, but which translated
the CPU writes to video memory to serial codes to a VT-220 type terminal.
Why would anyone want to do this? Dunno--it wasn't fast and all of these
boards lack the PROMs that would make them work in any case. But they've
got lots of LSTTL, some 4x16K DRAMs and a Z80A, Z80 CTC and a Z80 DART, all
in sockets. Perfect scrap items.
Cheers,
Chuck