Re: [Ql-Users] New document on DV3 drivers
Hi Per, Some programs, such as Qpac2 Files and Qmenu's DIR_ and FILE_SELECT$ seem to assume a maximum of 8 DDDs so, presumably, devices beyond that would not be accessable via these programs. Sure, the number of devices displayed is applicton specific. Marcel's latest version of the menu extensions dir_select (not file_select) allows for up to 10 devices, Qpac2 only 8, as you noted. Of course, in all you can also manually enter the device to display. Regards Wolfgang ___ QL-Users Mailing List
Re: [Ql-Users] New document on DV3 drivers
Thanks, Wolfgang. Youre very helpful, as always :) Yes, I meant drives, of course. Some programs, such as Qpac2 Files and Qmenu's DIR_ and FILE_SELECT$ seem to assume a maximum of 8 DDDs so, presumably, devices beyond that would not be accessable via these programs. Per On 29/12/2017 15:47, Wolf via Ql-Users wrote: Hi Per, 1) Is there is a limit to the number of directory device drivers that can be loaded at once (I believe there is/was and the number was 8?) No, there is no limit that I'm aware of. I'm pretty sure I already had more than 8 different devices loaded at some time. (you can test this with the sub device, jut use Wined or some such to change the device name every time and load it 10 times) 2) Is there is a limit of 16 devices (ie driver + device number 1..8) that can be in use at the same time? It is true that only 16 drives (not devices) can be accessed at once. This limit is set in the system variables : sys_fsdd equ $0100 16*long pointers to Filing System Drive Definitions sys_fsdt equ $0140 Filing System drive Definition table Top sys.nfsd equ $10 max Number of Filing System Drive definitions sys_fsch equ $0140 long linked list of Filing System CHannel blocks Back in the day, I seem to recall that once one had accessed one's allotted 16 devices, no further devices could be opened. (One had to do a DEL_DEFB to proceed.) Yes, except that it's drives, not devices. So if you have files open on flp1 ... flp8 and win1 ...win8 - that's it. Recently I discovered that if a device is no longer in use, its slot will be re-used, but I havent seen this documented anywhere. Do you have information on any of this? Not without checking in the source code, but I'm pretty sure that this is the correct scheme. HTH Wolfgang ___ QL-Users Mailing List ___ QL-Users Mailing List
Re: [Ql-Users] New document on DV3 drivers
Hi Per, 1) Is there is a limit to the number of directory device drivers that can be loaded at once (I believe there is/was and the number was 8?) No, there is no limit that I'm aware of. I'm pretty sure I already had more than 8 different devices loaded at some time. (you can test this with the sub device, jut use Wined or some such to change the device name every time and load it 10 times) 2) Is there is a limit of 16 devices (ie driver + device number 1..8) that can be in use at the same time? It is true that only 16 drives (not devices) can be accessed at once. This limit is set in the system variables : sys_fsdd equ$0100 16*long pointers to Filing System Drive Definitions sys_fsdt equ$0140 Filing System drive Definition table Top sys.nfsd equ$10 max Number of Filing System Drive definitions sys_fsch equ$0140 longlinked list of Filing System CHannel blocks Back in the day, I seem to recall that once one had accessed one's allotted 16 devices, no further devices could be opened. (One had to do a DEL_DEFB to proceed.) Yes, except that it's drives, not devices. So if you have files open on flp1 ... flp8 and win1 ...win8 - that's it. Recently I discovered that if a device is no longer in use, its slot will be re-used, but I havent seen this documented anywhere. Do you have information on any of this? Not without checking in the source code, but I'm pretty sure that this is the correct scheme. HTH Wolfgang ___ QL-Users Mailing List
Re: [Ql-Users] New document on DV3 drivers
On 29/12/2017 08:06, Wolf via Ql-Users wrote: Hi all, I've added a small technical explanation of DV3 drivers for SMSQE to the additional info and data section on the SMSQE site. Have fun Wolfgang Very nice, Wolfgang. Thank you! I have two questions (for now) which dont appear to be answered: 1) Is there is a limit to the number of directory device drivers that can be loaded at once (I believe there is/was and the number was 8?) 2) Is there is a limit of 16 devices (ie driver + device number 1..8) that can be in use at the same time? Back in the day, I seem to recall that once one had accessed one's allotted 16 devices, no further devices could be opened. (One had to do a DEL_DEFB to proceed.) Recently I discovered that if a device is no longer in use, its slot will be re-used, but I havent seen this documented anywhere. Do you have information on any of this? Per ___ QL-Users Mailing List
Re: [Ql-Users] New document on DV3 drivers
Wolf via Ql-Users wrote: > I've added a small technical explanation of DV3 drivers for SMSQE to the > additional info and data section on the SMSQE site. Which is here: http://www.wlenerz.com/smsqe/DV3_Device_Drivers.zip Good stuff, thanks Wolfgang! Peter ___ QL-Users Mailing List
[Ql-Users] New document on DV3 drivers
Hi all, I've added a small technical explanation of DV3 drivers for SMSQE to the additional info and data section on the SMSQE site. Have fun Wolfgang ___ QL-Users Mailing List
