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Where are all the ICD P:R: Connections?


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#51 Nezgar OFFLINE  

Nezgar

    Dragonstomper

  • 557 posts
  • Location:Regina SK Canada

Posted Mon Apr 16, 2018 11:23 AM

it will emulate an 850, and an internet modem, so it will work for wherever you can use an 850. I _have_ to emulate an 850 exactly, because the PLATO cartridge literally has an 850 handler baked into it, and does not load it from the 850 itself (there is NO RAM left to do so.)

 

I was thinking a more modern hack might be nice to just let the user load their preferred R: handler before executing the PLATO code.. Maybe only possible as an XEX.



#52 tschak909 OFFLINE  

tschak909

    River Patroller

  • 2,296 posts
  • Location:USA

Posted Mon Apr 16, 2018 11:38 AM

I have repeated this repeatedly:

There is no RAM to do so. 

 

Not possible. The handler has to be baked onto the cartridge ROM. 

 

-Thom

 

We will try to do the following, ideas once the cart is fully disassembled:

 

(1) remove the 1030/835 and MPP handlers, to get room to either add other handlers, or add additional features like flow control.

(2) remove the zoomed mode, which will gain 24K of RAM, so the image can be written to disk and/or relocated so that normal handlers can run (after removing the built in handler, and the code which plops it into HATABS.)


Edited by tschak909, Mon Apr 16, 2018 12:33 PM.


#53 Nezgar OFFLINE  

Nezgar

    Dragonstomper

  • 557 posts
  • Location:Regina SK Canada

Posted Fri Apr 20, 2018 12:46 AM

 

Both the MIO and the Black Box should take over from any run-time installed driver. SIO gives PBI devices first crack at satisfying the request, and if they do, then any other drivers aren't checked.

 

Powered up my 1MB MIO today - v1.1

 

I can confirm that even though the two options for Serial port in the menu is either 'R1:' or 'Not configured' it in fact seems to block the PRC handler from loading at all.  Disabling the MIO R1: allows PRC.COM to load the handler from the PRC, and BobTerm will communicate over PRC...

 

Wow the 9600 pitch is annoying... reminds me how silent PBI Serial on MIO sure was nice!!!



#54 Quantum Mechanic OFFLINE  

Quantum Mechanic

    Space Invader

  • 24 posts
  • Location:California

Posted Fri Apr 20, 2018 10:06 AM

Wow, that brought back a memory!  I totally forgot how the MIO was silent compared to its predecessors.  I remember going to a buddy's house when they first came out. He had purchased two of them, one for his BBS and one for his personal system. I hopped on the BBS machine and was struck by the deafening silence as the characters zipped by at 1200 baud speed. It was disconcerting... like when someone would turn down the volume on their TV and you couldn't hear the comforting SIO bleep bleep bleep. 



#55 Nezgar OFFLINE  

Nezgar

    Dragonstomper

  • 557 posts
  • Location:Regina SK Canada

Posted Fri Apr 20, 2018 10:13 AM

For further nostalgia - I meant to attach this picture of the config screen to my last post (Accessed by select-reset), guess i forgot to click something!

 

I've seen something about newer firmware, but maybe only for the later recreated MIO's.

 

The print buffer was a nice thing too, configurable memory allocation.

 

I would configure the ram disk to 900KB or something, and then ran a utility for the BBS called MIOCACHE - and it would use any unallocated MIO RAM for a disk cache... it tremendously sped up repetitive directory access, like scanning message bases, command folders, and file areas. the MIO RAMdisk was even faster than any internal ramdisk (less memory copying between banks) so a lot of the time i never even used the internal RAMdisk for the BBS even with 320K.

 

I had the MIO for about a year before I even got a hard drive, and it was great that the RAMdisk would keep its contents as long as it was left on, even when the computer got turned off. Being able to reassign floppy drives to other drive numbers in software was nice too. my standard setup had my floppy D1: reassigned to D4: by the MIO. (So I could boot D1: from the HD)

Attached Thumbnails

  • mio-R1.jpg


#56 BillC OFFLINE  

BillC

    Stargunner

  • 1,753 posts
  • Location:BC Canada

Posted Sun Apr 22, 2018 10:33 AM

For further nostalgia - I meant to attach this picture of the config screen to my last post (Accessed by select-reset), guess i forgot to click something!

 

I've seen something about newer firmware, but maybe only for the later recreated MIO's.

 

The print buffer was a nice thing too, configurable memory allocation.

 

I would configure the ram disk to 900KB or something, and then ran a utility for the BBS called MIOCACHE - and it would use any unallocated MIO RAM for a disk cache... it tremendously sped up repetitive directory access, like scanning message bases, command folders, and file areas. the MIO RAMdisk was even faster than any internal ramdisk (less memory copying between banks) so a lot of the time i never even used the internal RAMdisk for the BBS even with 320K.

 

I had the MIO for about a year before I even got a hard drive, and it was great that the RAMdisk would keep its contents as long as it was left on, even when the computer got turned off. Being able to reassign floppy drives to other drive numbers in software was nice too. my standard setup had my floppy D1: reassigned to D4: by the MIO. (So I could boot D1: from the HD)

According to the thread the updated MIOs are backwards compatible with the originals, all MEtalGuy66 did was change to 30-pin SIMM DRAM and update the serial/parallel ports to be compatible with common PC type cables. This means the updated firmware is supposed to be compatible with original ICD MIOs, it adds increased support for later SCSI HDD.

 

The v1.41 firmware is available from http://www.rasterline.com/, click the support button.



#57 Nezgar OFFLINE  

Nezgar

    Dragonstomper

  • 557 posts
  • Location:Regina SK Canada

Posted Sun Apr 22, 2018 11:29 AM

I never realized the new firmware would work with the old MIOs. I'll definitely check that out, see what EPROM it needs.




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