G'day Steve -
AOS/VS OS tape drive base names are MTA, MTB, MTC, etc. and do not
directly correspond to the assembler mnemonic name(s) - don't be
confused by this difference.
The AOS/VS 'MTA'-type tape drive is described on page IV-5. These
correspond to the original DG model 4030/6020 units.
The AOS/VS 'MTB'-type tape drive is described on page IV-15. These
correspond to the DG model 6026 units.
The AOS/VS 'MTC'-type tape drive is internally the same as the MTB
except only a single unit is supported. This was done to distinguish
single-unit support for the popular DG model 6125 streamer.
The IV-15 mag tape programming model was consistent between the
Nova/Eclipse/MV bus controllers and the Lbus controllers through
emulation. One size [almost] fit all.
What difference(s) are you seeing?
Bruce
On 1/25/2017 1:01 AM, Stephen Merrony wrote:
Does anyone have (a scan of) a manual that covers programming the MV-era
MTB tape controller?
I have a 1980 "Peripherals" manual (014-000632-01) from the
"Programmer's Reference Series" which covers the MTA type, but it seems
that the MTB behaves a bit differently and I am missing some information
for my current project.
Thanks,
Steve
