Re: [Ql-Users] Quanta Magazine
Hi All, I have taken over as the membership secretary. The latest magazine is incredibly late and that is purely down to me and I am working through that today. Simon, Michael, Ian, you should have all received copies up to and including April/May 2017. Can you send me you email address to my personal email - linuxtarragon@gmail just so I know I have the correct one and I will send out your copies. Regards John Southern On Sun, Jul 23, 2017 at 12:42 PM, IAN BURKINSHAW via Ql-Users wrote: > I have not received the magazine either. > In fact the last one I received was Oct/Nov 2015. > I keep meaning to contact Quanta, but just not around to it. > Ian > > On Sunday, 23 July 2017, 11:28, Michael Bulford via Ql-Users > wrote: > > > I've received two issues this year, up to the Feb/March issue. > None received since then. I did email John Gilpin last week, but no reply as > yet. > > > Michael > Dilwyn wrote: > >> I've forwarded this to committee members (don't know the answer myself), >> hopefully a reply soon. >> >> Dilwyn >> >> -Original Message- >> From: sba1derson via Ql-Users >> Sent: Sunday, July 23, 2017 9:08 AM >> To: ql-us...@q-v-d.com >> Subject: [Ql-Users] Quanta Magazine >> >> Has anyone received an electronic copy of Quanta magazine since the >> January/February 2017 issue? I've not received one since. I've contacted >> Quanta via their website but so far have had no response. > ___ > QL-Users Mailing List > > > > ___ > QL-Users Mailing List ___ QL-Users Mailing List
Re: [Ql-Users] Maximum length of files on QL file-system
For qubide with driver qubata v3.x the max file size supported may be 2 gigabytes minus some data structure kilobytes, provided you have created a suitable big partition with 64 sectors per block. This is the maximum under qdos with 2 words indexes when used as unsigned. Regards, Alain -Message d'origine- De : "Jan Bredenbeek via Ql-Users" Envoyé : 23/07/2017 17:21 À : "ql-us...@q-v-d.com" Objet : Re: [Ql-Users] Maximum length of files on QL file-system On 23 July 2017 at 15:47, Andrea Carpi via Ql-Users < ql-users@lists.q-v-d.com> wrote: > Hello everybody > > Trying to transfer large files between Windows 10, > QPC2, and QL-Aurora-SGC-Qubide I have noticed that there are big > limitations in the maximum length of the files. > > I mean: > - On QXL.WIN > hard drive in QPC2 I'm not able to generate files longer than 50Mb (End > Of file error) > - On the Qubide hard drive the limit is 19Mb (ROM 2.01), > but perhaps also depends on the partition creation choices > > - On Ram > Disk (in QPC2 maximum RAM 128 Mb) I did not find any limits unless the > size of the RAM > - I did not find limits on DOS devices from QPC2 except > those of the file system in use on Windows (NTFS) > > Specifically for > QXL.WIN and QUBIDE do anyone know the exact length limits and > why? > The QDOS file system stores the file position in the channel definition block as two 16-bit words - one for the block number and one for the byte position within one block. So, when using 512-byte blocks, the maximum file length will be 65535*512 bytes or just under 32MB (or 16MB when using signed arithmetic). When using 2K byte blocks, the limit will be 128 or 64MB respectively. I know mdv and flp use 512-byte block size and ED flp have 2K byte sectors but I'm not sure if the latter also uses 2K blocks. The same goes for (virtual) win drives - sectors are usually grouped to keep the map within limits but I don't know off-hand if that also affects the block size (it might as well be 512 bytes, depending on the driver). This use of word-sized block numbers within QDOS is an unfortunate design flaw - as is the standard FS.MDINF trap which returns word-sized sector counts - but could TT back in 1984 foresee that within five years there would be a storage medium for the QL that surpassed the 32MB limit? In the PC world there are multiple examples of this - remember the 32MB partition size limit in DOS 3.3, then the 528MB limit on CHS-addressed hard disks, and the initial 128GB limit on LBA which was supposed to 'fix' CHS. Storage capacity has grown so much that any 'X MB ought to be enough for everybody' design decision has proven wrong eventually... -- *Jan Bredenbeek* | Hilversum, NL | j...@bredenbeek.net ___ QL-Users Mailing List ___ QL-Users Mailing List
Re: [Ql-Users] Maximum length of files on QL file-system
Hi, there are limits to the QLWA (i.e.qxl.win) file system, but they shouldn't be so small. Basically, a file is limited to the size of the "disk" (it obviously can't be bigger than that) minus some overhead (for the FAT, the root secor and the rot directory). The QLWA system is a FAT type system. each entry in the FAT (called "map" in SMSQE parlance) is a word (2 bytes) long, so you can't reference more than 65536 clusters (or "allocation units"). A file could occupy all of these clusters (minus the overhead). I just created a 400 MB QXL.win disk and copied a 200 MB file onto it. No problem with file size there, it's just pretty slow under SMSQmulator. Qubide isn't that much different, except that each entry in the FAT takes a long word (4 bytes). HTH Wolfgang Trying to transfer large files between Windows 10, QPC2, and QL-Aurora-SGC-Qubide I have noticed that there are big limitations in the maximum length of the files. I mean: - On QXL.WIN hard drive in QPC2 I'm not able to generate files longer than 50Mb (End Of file error) - On the Qubide hard drive the limit is 19Mb (ROM 2.01), but perhaps also depends on the partition creation choices - On Ram Disk (in QPC2 maximum RAM 128 Mb) I did not find any limits unless the size of the RAM - I did not find limits on DOS devices from QPC2 except those of the file system in use on Windows (NTFS) Specifically for QXL.WIN and QUBIDE do anyone know the exact length limits and why? Thank you Andrea Carpi Con Mobile Open 7 GB a 9 euro/4 sett navighi veloce con 7 GB di Internet e hai 200 minuti ed SMS a 15 cent. Passa a Tiscali Mobile! http://tisca.li/Open7GB0617 ___ QL-Users Mailing List ___ QL-Users Mailing List
Re: [Ql-Users] Maximum length of files on QL file-system
On 23 July 2017 at 15:47, Andrea Carpi via Ql-Users < ql-users@lists.q-v-d.com> wrote: > Hello everybody > > Trying to transfer large files between Windows 10, > QPC2, and QL-Aurora-SGC-Qubide I have noticed that there are big > limitations in the maximum length of the files. > > I mean: > - On QXL.WIN > hard drive in QPC2 I'm not able to generate files longer than 50Mb (End > Of file error) > - On the Qubide hard drive the limit is 19Mb (ROM 2.01), > but perhaps also depends on the partition creation choices > > - On Ram > Disk (in QPC2 maximum RAM 128 Mb) I did not find any limits unless the > size of the RAM > - I did not find limits on DOS devices from QPC2 except > those of the file system in use on Windows (NTFS) > > Specifically for > QXL.WIN and QUBIDE do anyone know the exact length limits and > why? > The QDOS file system stores the file position in the channel definition block as two 16-bit words - one for the block number and one for the byte position within one block. So, when using 512-byte blocks, the maximum file length will be 65535*512 bytes or just under 32MB (or 16MB when using signed arithmetic). When using 2K byte blocks, the limit will be 128 or 64MB respectively. I know mdv and flp use 512-byte block size and ED flp have 2K byte sectors but I'm not sure if the latter also uses 2K blocks. The same goes for (virtual) win drives - sectors are usually grouped to keep the map within limits but I don't know off-hand if that also affects the block size (it might as well be 512 bytes, depending on the driver). This use of word-sized block numbers within QDOS is an unfortunate design flaw - as is the standard FS.MDINF trap which returns word-sized sector counts - but could TT back in 1984 foresee that within five years there would be a storage medium for the QL that surpassed the 32MB limit? In the PC world there are multiple examples of this - remember the 32MB partition size limit in DOS 3.3, then the 528MB limit on CHS-addressed hard disks, and the initial 128GB limit on LBA which was supposed to 'fix' CHS. Storage capacity has grown so much that any 'X MB ought to be enough for everybody' design decision has proven wrong eventually... -- *Jan Bredenbeek* | Hilversum, NL | j...@bredenbeek.net ___ QL-Users Mailing List
[Ql-Users] Maximum length of files on QL file-system
Hello everybody Trying to transfer large files between Windows 10, QPC2, and QL-Aurora-SGC-Qubide I have noticed that there are big limitations in the maximum length of the files. I mean: - On QXL.WIN hard drive in QPC2 I'm not able to generate files longer than 50Mb (End Of file error) - On the Qubide hard drive the limit is 19Mb (ROM 2.01), but perhaps also depends on the partition creation choices - On Ram Disk (in QPC2 maximum RAM 128 Mb) I did not find any limits unless the size of the RAM - I did not find limits on DOS devices from QPC2 except those of the file system in use on Windows (NTFS) Specifically for QXL.WIN and QUBIDE do anyone know the exact length limits and why? Thank you Andrea Carpi Con Mobile Open 7 GB a 9 euro/4 sett navighi veloce con 7 GB di Internet e hai 200 minuti ed SMS a 15 cent. Passa a Tiscali Mobile! http://tisca.li/Open7GB0617 ___ QL-Users Mailing List
Re: [Ql-Users] Quanta Magazine
I have not received the magazine either. In fact the last one I received was Oct/Nov 2015. I keep meaning to contact Quanta, but just not around to it. Ian On Sunday, 23 July 2017, 11:28, Michael Bulford via Ql-Users wrote: I've received two issues this year, up to the Feb/March issue. None received since then. I did email John Gilpin last week, but no reply as yet. Michael Dilwyn wrote: > I've forwarded this to committee members (don't know the answer myself), > hopefully a reply soon. > > Dilwyn > > -Original Message- > From: sba1derson via Ql-Users > Sent: Sunday, July 23, 2017 9:08 AM > To: ql-us...@q-v-d.com > Subject: [Ql-Users] Quanta Magazine > > Has anyone received an electronic copy of Quanta magazine since the > January/February 2017 issue? I've not received one since. I've contacted > Quanta via their website but so far have had no response. ___ QL-Users Mailing List ___ QL-Users Mailing List
Re: [Ql-Users] Quanta Magazine
I've received two issues this year, up to the Feb/March issue. None received since then. I did email John Gilpin last week, but no reply as yet. Michael Dilwyn wrote: > I've forwarded this to committee members (don't know the answer myself), > hopefully a reply soon. > > Dilwyn > > -Original Message- > From: sba1derson via Ql-Users > Sent: Sunday, July 23, 2017 9:08 AM > To: ql-us...@q-v-d.com > Subject: [Ql-Users] Quanta Magazine > > Has anyone received an electronic copy of Quanta magazine since the > January/February 2017 issue? I've not received one since. I've contacted > Quanta via their website but so far have had no response. ___ QL-Users Mailing List
Re: [Ql-Users] PCB Design v7.52
I did send a similar reply but it doesn't seem to have arrived. I copied the original query from Wolfgang to the author (Malcolm Lear) in case he doesn't read this list. Looks like yahoo mail playing up on me again, seem to get two copies of all mails to the list and some of my mails don't get through. Hmm... Dilwyn -Original Message- From: Wolf via Ql-Users Sent: Sunday, July 23, 2017 6:43 AM To: ql-us...@q-v-d.com Subject: Re: [Ql-Users] PCB Design v7.52 Hi Michael, There is the -Q1 option in unzip to reverse the "_" <-> "." Eg. EX unzip,#1; "-Q1 dos7_PCBDesign752.zip -d ram6_" and they all come out with dots in them ! Great, thanks for pointing that out. I have run the code and this does work well using QPC2, in extended screen size. Ok, I'll have to recheck, then WOlfgang ___ QL-Users Mailing List --- This email has been checked for viruses by AVG. http://www.avg.com ___ QL-Users Mailing List
Re: [Ql-Users] Quanta Magazine
I've forwarded this to committee members (don't know the answer myself), hopefully a reply soon. Dilwyn -Original Message- From: sba1derson via Ql-Users Sent: Sunday, July 23, 2017 9:08 AM To: ql-us...@q-v-d.com Subject: [Ql-Users] Quanta Magazine Has anyone received an electronic copy of Quanta magazine since the January/February 2017 issue? I've not received one since. I've contacted Quanta via their website but so far have had no response. ___ QL-Users Mailing List --- This email has been checked for viruses by AVG. http://www.avg.com ___ QL-Users Mailing List
[Ql-Users] Quanta Magazine
Has anyone received an electronic copy of Quanta magazine since the January/February 2017 issue? I've not received one since. I've contacted Quanta via their website but so far have had no response. ___ QL-Users Mailing List
