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towards a P2 Virtual Machine using XBYTE and Subsystems
This is some experiment exploring possibilities of P2. Overall goal is a self contained system like Taqoz with SD card using PC with Teraterm as terminal. One aspect is about the virtual machine: I asked myself, what would be the most "natural way" to implement a dual stack machine (Yes, my implementation shall run Forth,… -
OLD XBEE SOMETHING SIMPLE
Good evening, Hope everyone's holiday weekend is great. I dusted off some old XBee's... they are XBee PRO S1. I have not powered them up in over 14 years. I used XCTU to initially communicate with them... They seem to work fine. But when I load the following programs (spin), it illuminates the first LED(25) but does not… -
10V Analog input
Have this gas pressure measuring thing that want to connect to a P2 based controller: https://www.ashcroft.com/wp-content/uploads/2020/09/datasheet-pressure-transducer-g2.pdf Output is 10V analog. Have 2 free P2 pins to do it... Was thinking of an I2C ADC, but now think will just use P2 ADC instead. Want to do it in a safe… -
New p2docs pages: Errata and Optimization Guide
I just added two new pages to the p2docs site: Optimization and Coding for Speed, which should collect advice for fast coding - please tell me if you don't understand something (unless there's already a "TODO" there) Hardware Bugs & Errata, a list of P2 hardware bugs. I feel like I forgot at least one that was previously… -
[SOLVED][FlexSpin] Confusion about pointers to structures or compiler bug?
Hey @ersmith Can you tell me if I'm misusing pointers to structures or if this might be a bug? Consider this top-level object: {Spin2_v51}con struct mystruct(... word m1, ... word m2, ... word m3)obj ch: "child"pub main() | mystruct realstruct ch.set_struct(realstruct) and its child object {Spin2_v51}con struct… -
Hardware oddity: HUBEXEC from memory below $400
CON_CLKFREQ = 100_000_000DAT org loc pa,#$+1 ' < PA = 1 in cogexec, PA = 4 in hubexec mov thedbg,#0 ' to prove the point, delete cog copy cmp pa,#1 wz if_z skip #%10 if_z jmp #\$FFFFC ' go for the wraparound!thedbg debug("hubexec from low memory!!! ",udec(pa)) QED. -
Re: towards a P2 Virtual Machine using XBYTE and Subsystems
Reserved -
Re: New P2 module
This SMT PLCC socket is especially tight. Think going to replace with the through hole version. Plus, like the gold contacts can get with through hole.. And, there's the holes that might be able to use to push SWaP module out of the socket...