Title : DB1
Also Known As: DB1 +3 Disc Backup Utility; DB1 Plus 3 Disc Backup Utility
Publisher : Kobrahsoft
Release Year: 1988
No. Players: 1
Entry Type: Utility: Copy/Backup
Machine Type: 128 +3
Availability: Available
Comments: The .dsk image below doesn't work in all emulators, due to the copy protection. In those cases:#Firstly, the disk has to be set to auto-load. If the disk is loaded by pressing Enter for Load on the +3 start-up menu then it won't work, as the I-register will be set to $3F and the decryption routine will give the wrong result. With auto-load set the I-register will be set to $00 and the code will decrypt correctly.#Secondly, set a break at $8BE2: LD SP,$8000; step through that command then skip over the next two CALLs and jump straight to the $8BEB: DI command, then Run and the DB1 start-up screen will be ready to use. I presume that the first CALL is the copy protection, as if it returns NZ (which it does) it makes the second CALL which erases all the memory and does a reset.
Updated On : May 25, 2020
Groups: g164
| Kobrahsoft | |
|---|---|
|
Release Year: 1988 Released As: DB1 +3 Disc Backup Utility;DB1 Plus 3 Disc Backup Utility Price: £12.95 |
|
Download and Play
| Play | File | File Type | Protection Scheme | Year |
|---|---|---|---|---|
| Kobrahsoft - Original release - +3 disk image | Disk image | None | 1988 |
Additional Files
| File | File Type |
|---|---|
| Kobrahsoft - PDF document | Instructions |
| Kobrahsoft - Picture | Running screen |
