The disk images with an "DV23" in the name, contain the CPM 2.2 BIOS22D-v23 that can dynamically reconfigure up to 16 disk drives. This BIOS DOES support auto-logins, using either the old IDT(I.D. Table) or a new DD(Disk Definition) located in sector 5 of each disk. 

The disk BOOT62BDv221.IMG does NOT support auto-login. BIOS22d-v221 ignores the DD and/or IDT


The disk BOOT62BDv23.IMG is updated to contain a new bios (BIOS22d-v23) and a DD for a PC1440 disk
         
     Bootable 62k Banked Dynamically configurable Version 2.3 of bios
 
Its BIOS22D-V23 has two extra bytes added to the DPBs.. This is CPM3 compatibility for programs that use the DPB. This is done for programs that incorrectly do not check what version upon which they are running. The extra two bytes are always 0. 

This BIOS (v23 and v221) also has a fix for programs that incorrectly do direct BIOS calls using 8 bit sector numbers instead of the required 16 bit sector numbers. Any Disk with a DPB with SPT less than 256 will automatically have the requested sector number in BC truncated to 8 bits. 

Drives A:-P: default to PC1440 disk images (Z80EMU drives default to PC1440, but you can change the default, so make sure that the drive configuration matches the CPM DPB configuration. 

Drives A:-P: will be auto-logged-in, if they contain a DD or IDT in sector 5. If there's no magic then drive default to whatever the drive is currently configured as.

Each drive A:-P: has enough Allocation vector and Checked directory entries to support up to an 8MB disk with 2048 directory entries. Each has an XLT for 256 8 bit sector translation.

The program DC.COM can be used to dynamically change drive parameters (DPB and Disk drive properties).
The program DCC.com can be used to set DPB paramenters for CDOS disk images.
The program DCJ.COM can be used to dynamically LOGIN Jade DD disk images.
The program DROPZONE.COM can be used to bulk transfer files from Windows to the CPM file system.

BIOS22D-v23 does not require an ID Table in sector 5 of a PC1440 disk image. HOWEVER, it can use them. BIOS22d-v23 will auto login any disk with either the old IDT or a new DD. IF Neither IDT nor DD is present, Bios22-v23 will leave the current drive configuration AS-IS for both the CPM DPB and the NDI (new disk interface). 

For BIOS22v23, If a DD or IDT is present, then it is NOT required for the user to set drive properties. The old BIOS22/I does require the user to manually set the drive parameters, while the BIOS22/I only set the DPB.  When the new BIOS-v23 finds an old IDT, it always configures the drive as PC1440, then configures the CPM DPB according to IDT.

The DC.COM program injects the PC1440 disk definition info into the CPM DPB and reconfigures the NDI, reguardless of what's in sector 5. But be WARNED, each disk reset (warm boot or Control-c) will cause an auto-login at the next access of any disk currently inserted, if the disk contains an IDT or DD the auto-login will undo what DC.com may have done.

The DCJ.COM program can configure Jade DD disk images whether or not they contain an IDT is sector 1. The DCJ LOGIN function is for disks with a JadeDD IDT (not DD or old Z80Emu IDT) in sector 1(not 5). 
 
All PC1440 disks supplied for the Z80 Emulator do NOT have an old style ID Table in sector 5
BOOT62dv23.img does have a new DD in sector 5. (but it is only required, if you want auto-login to configure a disk) 

Using BIOS22d-v23, any disk with a new DD or an old IDT in sector 5 will be auto logged-in. 

Any disk without an IDT or DD will not be auto configured in any way. This is compatible with how the Z80 emulator's old BIOSes used to work.(except BIOS22/I)

WARNING  the COPYSYS program will copy all of track 1, including the IDT or the DD if present. make sure that after you transfer the system to a new disk, that you ensure a correct DD or IDT describing the new disk's configuration is in sector 5.(or, if you wish that manual configuration will always be required, sector 5 contains NO magic.) 

Best to use the new putsys program to copy system. putsys also gets system.

DDs for a PC1440, PC4104 and PC8190 are included, along with the old IDT1440.

For DDs and IDTs to work, all that is required of the format is that sector 5 of track 0 be accessable. IF sector 5 can not be read, no auto-login will occur, however after you make sector 5 accessable, it will.(using BIOS22d-v23)


To use DROPZONE.COM 

Select default User Number for files (drop-down list box, located directly under the DropZone)
Select up to 255 Windows files (no directories) and Drag from Explorer to the DropZone. 
Answer any queries and prompts about invalid or duplicate filenames.
Run CPM program DROPZONE X:    (where X: is a valid CPM drive spec)

Files will be deposited on drive X:

If files are already in the DropZone and you don't want them to be there... run "DROPZONE RESET".
To see what files are in the DropZone ... run "DROPZONE LIST". Files are left in the Zone.

You can also right click the dropzone for info.
