On Fri, Nov 8, 2024, 7:31 AM TerraHertz via cctalk <[email protected]> wrote:
> Here's the manual for the 1640B HP-IB option board: > http://everist.org/archives/scans/HP_1640B_OPT_001/ > > And as a zip file: > http://everist.org/archives/scans/HP_1640B_OPT_001/HP_1640B_OPT_001.zip > (4.4MB) > The parts list shows an HP 1AA6-6004 HPIB PHI chip. If anyone is curious about that chip, Ken Shirriff has a detailed post about it here: https://www.righto.com/2023/12/HP-silicon-on-sapphire-phi-chip.html >
