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First post. Really interested (but a little scared) in building one of these. Started my career operating 2 PDP/11/70s (RSTS/E) With CDC 9766 (300MB) disks, went on to programming/administrating. Saw this front panel on a daily basis.
No soldering experience so I've been looking at soldering tutorials and some inexpensive kits to practice on.
I have an old Raspberry Pi Model B+ (bought end of 2014), I know it's not recommended but would it be of any use for testing?
Would probably later upgrade to a Raspberry Pi 3 B+, because of price and availability.
The Pi I used for the kit I build in 2019, reports itself as "Raspberry Pi 2 Model B Rev 1.1"; it works fine.
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A powerful feature of the Raspberry Pi is the row of GPIO (general-purpose input/output) pins along the top edge of the board. A 40-pin GPIO header is found on all current Raspberry Pi boards (unpopulated on Raspberry Pi Zero, Raspberry Pi Zero W and Raspberry Pi Zero 2 W). Prior to the Raspberry Pi 1 Model B+ (2014), boards comprised a shorter 26-pin header. The GPIO header on all boards (including the Raspberry Pi 400) have a 0.1" (2.54mm) pin pitch.
Tom,
This is very interesting to me … I have a Pi 3B+ running a PiDP-11/70 (kit from Oskar) – how do I get DEC BASIC Plus and run it on the PiDP-11 RSTS/E ??
Thanks!
Sent from Mail for Windows
On Monday, April 24, 2023 at 3:50:27 PM UTC-4 bill...@gmail.com wrote:
Thanks for everyone's input. Yes the 2014 B+ has 40 pins (here it is). So maybe it will limp along, until I can upgrade. Probably slow but worth a try.
I've run RSTS/E in SIMH on my Linux desktop for a few years. But haven't tried on the Pi yet. Guess I'll try that 1st.
Thanks again!
On Monday, April 24, 2023 at 12:33:53 PM UTC-4 chrom...@gmail.com wrote:
> On 24 Apr, 2023, at 6:53 pm, Clem Cole <cl...@ccc.com> wrote:
>
> I will parse to mean that the RPiB+ made in 2014 - does indeed have a 40-pin header (as I said, it's the connector that matters), 2014 board sounds like it should work; i.e. any RPi designed and delivered post the 2014 RPiB+ should be fine, although my comments about power and SD cards.
Since OP has his unit in hand, it should be straightforward for him to just count the pins. It'll either be two rows of 13 or two rows of 20; easy to tell apart.
Second and third the emphasis on getting a good SD card. The early RPi models used full-size cards, which may be easier to find in the Class 6 guise (which unlike Class 10 has a guarantee for random-write performance) than the modern Class A1 or A3 rating (which is aimed at "application" performance). Indeed early RPi models might have compatibility problems with the higher-performance SD cards.
With that said, most Micro-SD cards now come with an adapter so they can be used as full-size cards too. My present rule of thumb is to go for a reputable brand name (eg. SanDisk or Samsung) with at least an A1 rating *and* where they've bothered to use more than one dye colour on the card itself (so SanDisk Ultra, Extreme, and Extreme Pro are all fine, but SanDisk Edge isn't - from personal experience - even though it has a Class A1 rating).
- Jonathan Morton
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Tom,
This is very interesting to me … I have a Pi 3B+ running a PiDP-11/70 (kit from Oskar) – how do I get DEC BASIC Plus and run it on the PiDP-11 RSTS/E ??
Thanks!
Yes, mine uses microSD cards, not full-sized.
Tom L
Tom Lake,
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