>-Original Message-
>From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Fritz Mueller
>via cctalk
>Sent: Tuesday, January 08, 2019 1:43 PM
>To: General Discussion: On-Topic and Off-Topic Posts
>Subject: Re: KD11-E/EA microcode flow diagrams
>
>... I
> From: Fritz Mueller
> I should go read up on QSIC.
There's not much on the Web, alas. We have two working prototypes (a wirewrap
QBUS mother-board with bus transceivers, level converters, etc, connected to
an FPGA prototyp ung card by flat cables), and working FPGA code to emulate an
R
> On Jan 8, 2019, at 9:23 AM, Noel Chiappa via cctalk
> wrote:
>
> ... Dave B and I need a PDP-11 in the FPGA on the QSIC, to run the USB
> protocol on; rather than using a microcontroller, we decided the hack value
> of putting an -11 in there was too much to resist.
Fun! I should go read
> From: Fritz Mueller
>> the last microinstruction for RTI/RTT has been moved from 002 -> 744.
> So what's at 002 now? Maybe something new was required there by micro
> branch/fork logic, so the original contents had to be moved?
Well, it turns out I've been transcribing the ucod
> On Jan 5, 2019, at 3:35 PM, Noel Chiappa via cctalk
> wrote:
>
> The only difference I can see (I compared page by page, to see if each page
> had the same microinstructions on it) is that on sheet 17; the last
> microinstruction for RTI/RTT has been moved from 002 -> 744. (The actual
> micr
