I had this “infinite windows” problem on my Win10 machine also. I was able to get it to work on my old XP Pentium IV and I’m not sure if I ever got back to fixing Win10? I like Les’ suggestion…
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Have you tried configuring one of the other UARTS for console?
From: se...@googlegroups.com <se...@googlegroups.com> On Behalf Of Mitchell Smith
Sent: Friday, July 02, 2021 9:18 PM
To: SEBHC <se...@googlegroups.com>
Subject: Re: [sebhc] SVD III/H8D Utility crash
Success on that one!
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When he developed SVD III Dave Runkle added an ability to battery-backup the RAM (which holds the disk images). The firmware is actually the same firmware from the previous version (SVD II) and hence isn’t aware that the RAM is backed up, so on power on it starts from scratch, requiring the user to re-load the images.
More on SVD III is here:
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If we assigned 100K per floppy disk, then you need about 300KB for three drives. As the RAM is divided by two, you have 200KB for two drives + 56KB left. The bank switch will provided additional 256KB for two more 200KB floppies to use. If all RAM could be used by software, you could have 3 floppies drives + 2 spares to use.
Thanks,
Norberto
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That it can do.
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I had just assumed that it was there to allow its ability to co-exist with other physical drives as main boot or not rather than having three actual virtual ones, although logic would say some form of setting for the image of drive select was a more logical way to handle that in software.
Tim
On 07/07/2021 15:56, Mitchell Smith wrote:
So it's really a limitation of HDOS then?
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If we assigned 100K per floppy disk, then you need about 300KB for three drives. As the RAM is divided by two, you have 200KB for two drives + 56KB left. The bank switch will provided additional 256KB for two more 200KB floppies to use. If all RAM could be used by software, you could have 3 floppies drives + 2 spares to use.
Thanks,
Norberto
From: se...@googlegroups.com <se...@googlegroups.com> On Behalf Of Mitchell Smith
Sent: Wednesday, July 7, 2021 6:32 AM
To: SEBHC <se...@googlegroups.com>
Subject: Re: [sebhc] SVD III/H8D Utility crash
I can certainly help but I'm 3000 miles away from my H8 for the next 3 weeks.
I'm also curious about something. The SVD III has 3 virtual drives. I load HDOS 2.0 in the first, then anything else in the second, it's at 87% of the SVD's memory capacity. There doesn't seem to be room for loading anything into the 3rd device.
Am I missing something or doing something wrong?
Do I need to use the 2nd memory bank for this?
Thanks.
Mitch
On Tuesday, July 6, 2021 at 11:29:56 PM UTC-7 Norby wrote:
Someone else might have such board and could help with the measurements. As the 74LS06 is open collector it might not be that bad. If the measurements are fine, then we just need to add a diode in series with R12 to VCC and nothing else. We need to verify first data retention by the HW before any software updates can be done. I think someone on this team can help with the FW once we do verify that the HW is protecting the RAM data during a power-down sequence. Norberto
From: se...@googlegroups.com <se...@googlegroups.com> on behalf of Paul Laba <paul....@gmail.com>Sent: Tuesday, July 6, 2021 7:46 PMTo: se...@googlegroups.com <se...@googlegroups.com>Subject: Re: [sebhc] SVD III/H8D Utility crashThanks Norberto for that analysis!
Wish I could help, but my SVD-III is nothing more than a PCB and bunch of parts at this point. I was getting ready to start building it, which prompted my post about the firmware update.
Paul
On Tue, Jul 6, 2021 at 8:58 PM norberto.collado koyado.com <norberto...@koyado.com> wrote:
Thanks for the update and the FW then assumes the RAM is not initialized on power-up. I went back to check the battery circuit and the "RST" signal going to RAM is not setup properly to maintain backup of the RAM. So, every time you power down the new SVD, "RST" might go low causing a write to RAM. So, R12 needs to be wired to pin 32 of the RAM. IC4 pin 14 will need to add a diode and VCC needs to be wired to pin 32 of the RAM. Also, the way is wired now it might drain the battery at a faster rate. Can you power down the SVD, measure the voltage at pin 2 of IC4, and measure also voltage at the RAM on pin 32? Then wait 30 minutes and measure again and send me the results. This is what the specs states regarding data retention on such RAM. So, if battery voltage is 3Volts, then CE# (RST in this case) should be sitting at 2.8 volts. The lowest it can go without losing data is 1.3V on "RST".
From: se...@googlegroups.com <se...@googlegroups.com> on behalf of Paul Laba <paul....@gmail.com>Sent: Tuesday, July 6, 2021 5:18 PMTo: se...@googlegroups.com <se...@googlegroups.com>Subject: Re: [sebhc] SVD III/H8D Utility crash
It’s a useful feature if your PC is not located near your H-8 or H89; you can move back and forth between the two (removing power from the SVD-III) while preserving your images saved in the SRAM.
But the firmware needs to be updated to recognize the presence of the battery and not reinitialize the SRAM when power is restored.
Paul
On Tue, Jul 6, 2021 at 8:04 PM Glenn Roberts <glenn.f...@gmail.com> wrote:
When he developed SVD III Dave Runkle added an ability to battery-backup the RAM (which holds the disk images). The firmware is actually the same firmware from the previous version (SVD II) and hence isn’t aware that the RAM is backed up, so on power on it starts from scratch, requiring the user to re-load the images.
More on SVD III is here:
http://www.astrorat.com/semivirtualdiskproject.html
From: se...@googlegroups.com <se...@googlegroups.com> On Behalf Of norberto.collado koyado.comSent: Tuesday, July 06, 2021 2:55 PM
To: SEBHC <se...@googlegroups.com>
Subject: Re: [sebhc] SVD III/H8D Utility crash
If the battery is preserving the data, then there is no need for FW updates. What I'm missing here? Norberto
From: se...@googlegroups.com <se...@googlegroups.com> on behalf of PRL-89 <paul....@gmail.com>Sent: Tuesday, July 6, 2021 7:38 AMTo: SEBHC <se...@googlegroups.com>Subject: Re: [sebhc] SVD III/H8D Utility crash
Mitch, Try using the SVD utility from the command line, not by using the H8D Utility which basically spawns a command line instance and kicks off the tosvd.exe utility. Seems like H8D Utility is crashing and spawning a million instances. The H8D Utility is severely outdated and not very compatible with Windows 10 and all of the new Windows restrictions. I’ve been meaning to rewrite it but I keep getting sidetracked. Here are the instructions for using the command line utility.http://thesvd.com/pcsoftware.php Les On Friday, July 2, 2021, 12:18:56 PM EDT, Mitchell Smith <kb3...@gmail.com> wrote: Hello everyone.It's been months since I first mentioned that I was having problems with the SVD utility.Just now trying to get back to it. Here's what's going on...I'm running Windows 10.I launch the H8D Utility.I select SVD so I can transfer .h8d images to to my SVD III board.Select the proper comm port and hit Check. I get SVD Ver. 2.4.I then select LOAD and browse to a disk image.After I select the image, it doesn't appear to transfer to the SVD board. That is, none of the serial card lights blink like its receiving data. Then I get a very hard crash. So bad that the task manager won't load most of the time so I can't kill the application.The times when task manager would load, it appears that the SVD program is continually spawning the "tosvd.exe" program. It keeps doing this until Windows 10 locks up and I have to force a power off to recover. I have tried running the program in compatibility mode for WinXP but that doesn't seem to help. It also doesn't seem to matter which .h8d image I choose. I get the same results. Even tried running under Ubuntu/Wine but the program doesn't like the paths it sees. Any thoughts or ideas? Thanks.Mitch Smith --You received this message because you are subscribed to the Google Groups "SEBHC" group.To unsubscribe from this group and stop receiving emails from it, send an email to sebhc+un...@googlegroups.com.To view this discussion on the web visit https://groups.google.com/d/msgid/sebhc/a4ade67d-a0e3-4183-a3ad-3c59e666591fn%40googlegroups.com.--
Not sure about the board files. Schematic is in here:
http://www.astrorat.com/semivirtualdiskproject.html
http://www.astrorat.com/images/SVD-III-REVC3.pdf
I think Tim Gilberts may have recently had a board fabricated so he may be able to enlighten us.
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On Aug 18, 2021, at 7:08 AM, Les Bird <les...@bellsouth.net> wrote:
I would definitely get a HSFE and use 3.5in drives. Way more reliable then using 5.25in drives and media.
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Mitch,
I do have the HSFE that I do not use anymore as I used boards that have that already build in for the H8 and the H89. It is fully functional. I will find it this weekend and send it to you.
Ping me during the weekend as I’m busy and easily get distracted. 😊
Thanks,
Norberto
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Great! Once I find it, I will send you a PayPal invoice, just for shipping. The board and components are free of charge.
Thanks,
Norberto
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Hello Mitch,
It took a while to find the board. I will ship out tomorrow and this board is fully functional.
Here is the documentation link as you will need to change the Dip switch settings depending on your configuration.
https://sebhc.github.io/sebhc/storage/hsfe.pdf
Have fun!
Norberto (Norby).
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