So I believe what you’re seeing here is the difference between the actual space used by the file and the amount of space *allocated* for the file. HDOS allocates space in integral numbers of clusters. A cluster is typically 2, 4, 8 or more sectors, depending on the disk geometry. For example on a 100K hard sectored disk a cluster is 2 sectors or 512 bytes. That means that a file that has only a single byte of useful data gets allocated 512 bytes. I can’t recall but am guessing that on the H37 the clusters are either 4 or 8 sectors.
When you CAT (DIR) a file name the directory size listing shows the size of the meaningful data in the file. E.g. for a .ABS file this is based on the information in the file header. If you want to see the actual total amount of storage allocated for the file you can use the /ALL switch, e.g.
CAT XREF.ABS/ALL
Then you should see a number indicating the actual total amount of space used by the file on the disk. I’m pretty sure that’s what you’re seeing here?
If you’re interested, you could read Tom Jorgensen’s “Dissecting the HDOS Disk” article from Microcomputing:
https://sebhc.github.io/sebhc/documentation/supplemental/HDOS_Disk.pdf
I also touched on some of this in a REMark article I did in 1984 (p. 58) and include some other references in there on HDOS disk structure (the article was primarily aimed at users who have only a single disk drive and ways to economize on space):
http://pestingers.net/pdfs/remark-scans/1984/remark-volume5-issue2-1984.pdf
hope this helps…
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On Dec 1, 2021, at 5:24 AM, Roland Langfeld <rolandl...@gmail.com> wrote:
Dear Mark, dear Glenn,
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I will check my stash of boards this weekend. If I still have left any bare H89-USB-Serial boards, I will send you one. Ping me on Sunday if you do not hear from me as I get busy with family. 😊
Norberto
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I should have some GOTEK images booting CP/M. I will check tonight once I get home.
Norby
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On the 5.25” floppy disks, I have been getting mine from Coleman’s Military surplus (https\\www.colemans.com)
50 disks - $24.95
100 disks - $39.95
500 disks - $149.95
Sent from Mail for Windows
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New old stock in boxes of ten.
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Norby: If you uncover a second PCB, I’m interested as well :-}. Thank you.
From: se...@googlegroups.com <se...@googlegroups.com> On Behalf Of Roland Langfeld
Sent: Wednesday, December 1, 2021 2:03 PM
To: SEBHC <se...@googlegroups.com>
Subject: Re: [sebhc] .h8d files in SEBHC archive
Norby: thank you so much !
Roland
Norby schrieb am Mittwoch, 1. Dezember 2021 um 19:47:01 UTC+1:
I will check my stash of boards this weekend. If I still have left any bare H89-USB-Serial boards, I will send you one. Ping me on Sunday if you do not hear from me as I get busy with family. 😊
Norberto
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Hi Guys,
I believe I made this image file to support deployment of Norberto’s Z-67-IDE several years ago.
-ken
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Baud rate = 9600bps.
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Memory Decode ROM U517 444-66
JJ501 - JJ504: 1|1| wire going elsewhere |0
IO-Decode ROM: 444-61
Code ROM: 444-84
Sec Adress Decoder: 444-83
JJ 505 - 508: 1| wire going elsewere |1 |1
ROM 444-19,
RAM 2112 on U23 and U25
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Great news!
Let me work this weekend in getting the three original Heath CP/M floppies into the Gotek. It is better to have the original CP/M disks to do a new installation.
Thanks,
Norberto
From: "se...@googlegroups.com" <se...@googlegroups.com> on behalf of Roland Langfeld <rolandl...@gmail.com>
Reply-To: "se...@googlegroups.com" <se...@googlegroups.com>
Date: Friday, December 3, 2021 at 2:15 AM
To: "se...@googlegroups.com" <se...@googlegroups.com>
Subject: Re: [sebhc] .h8d files in SEBHC archive
Hello Norby,
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I downloaded the CPM 2.2.04 Distribution set. It is a set of 4 floppy drives. How I extract the CP/M H8D images into a floppy? I cannot remember how I did it years ago.
Thanks,
Norberto
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That image uses the H67 controller, so it should be better to have only H37 images. So, better to have the original H37 images on Gotek.
Norberto
From: "se...@googlegroups.com" <se...@googlegroups.com> on behalf of Mark Garlanger <garl...@gmail.com>
Reply-To: "se...@googlegroups.com" <se...@googlegroups.com>
Date: Friday, December 3, 2021 at 10:00 PM
To: "se...@googlegroups.com" <se...@googlegroups.com>
Subject: Re: [sebhc] .h8d files in SEBHC archive
Hey Norberto,
Error! Filename not specified.
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Hello Roland,
I did check for H89 spare boards and did not find any for the H89-USB-Serial board. I’m fine ordering some as others might be interested as well.
Thanks,
Norby
From: "se...@googlegroups.com" <se...@googlegroups.com> on behalf of Roland Langfeld <rolandl...@gmail.com>
Reply-To: "se...@googlegroups.com" <se...@googlegroups.com>
Date: Wednesday, December 1, 2021 at 11:03 AM
To: "se...@googlegroups.com" <se...@googlegroups.com>
Subject: Re: [sebhc] .h8d files in SEBHC archive
Norby: thank you so much !
Roland
Norby schrieb am Mittwoch, 1. Dezember 2021 um 19:47:01 UTC+1:
I will check my stash of boards this weekend. If I still have left any bare H89-USB-Serial boards, I will send you one. Ping me on Sunday if you do not hear from me as I get busy with family. 😊
Norberto
From: "se...@googlegroups.com" <se...@googlegroups.com> on behalf of Roland Langfeld <rolandl...@gmail.com>
Reply-To: "se...@googlegroups.com" <se...@googlegroups.com>
Date: Wednesday, December 1, 2021 at 10:33 AM
To: "se...@googlegroups.com" <se...@googlegroups.com>
Subject: Re: [sebhc] .h8d files in SEBHC archive
yes indeed, it would be nice to have a serial card, although my parallel TT:-solution works fine: I can print or list to my PC and send Data to the H89.
When I bought the H89 I got a separate serial card (see picture), it looks like a homebrew-project. The problem with this card is, if I plug it into slot 5 (I assume it belongs to slot 5) the CPU will not run, I get only one beep at start-up.
Roland
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This is getting complicate. Let me try to find the original CP/M disks and then create a copy for the Gotek.
Norberto
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Me too!
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Very nice. Thanks!
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On Dec 10, 2021, at 11:24 AM, pel...@gmail.com wrote:
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Hi Roland & Mike,
Based on the sign-on message for the CP/M 2 boots, I believe I made this disk to run QS-CP/M and it is expecting a Z67 hard disk.
On the disks where it is expecting another floppy disk, if not present, you get a BDOS select error. ^C should get you the command prompt so that you can run CONFIGUR to adjust settings.
HDOS 2.0 cannot read HDOS 3 formatted disks. HDOS 3 CAN read HDOS 2.0 disks.
Sent from Mail for Windows
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Hi Roland,
Attached – the H8D images of the 7 distribution disks.
This should get you a working HDOS 3.02 system.
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