Hi Bruce, Thanks for that confirmation of my hazy memory!
What I can't seem to find is any reference as to how the tape drives interact with the DCH bus and the associated map slots. I thought maybe a later guide might cover that? Steve -----Original Message----- From: Bruce Ray [mailto:br...@wild-hare.com] Sent: 25 January 2017 18:23 To: General Discussion: On-Topic Posts <cct...@classiccmp.org> Subject: Re: Data General MTB Reference Sought 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 >
