Difference between revisions of "DkTronics CPM"
(→Technical) |
(→Creating the DkTronics 61K TPA CPM 2.2) |
||
| Line 7: | Line 7: | ||
Boot into CPM2.2 from system discs: | Boot into CPM2.2 from system discs: | ||
| − | A>disckit2 | + | A>disckit2 |
Use disckit2 to format a vendor disc. This will become 'Dk'Tonics CPM Disk'. | Use disckit2 to format a vendor disc. This will become 'Dk'Tonics CPM Disk'. | ||
| − | A>BOOTGEN | + | A>BOOTGEN |
Source is: CPM 2.2 disk | Source is: CPM 2.2 disk | ||
Now insert 'Dk'tronics CPM Disk'. | Now insert 'Dk'tronics CPM Disk'. | ||
This initialises the boot sector. | This initialises the boot sector. | ||
| − | + | ||
| − | A>SYSGEN | + | A>SYSGEN |
Source is CPM2.2 disk | Source is CPM2.2 disk | ||
Destination is 'Dk'Tronics CPM Disk' | Destination is 'Dk'Tronics CPM Disk' | ||
| Line 23: | Line 23: | ||
This puts CPM2.2 onto the disc. | This puts CPM2.2 onto the disc. | ||
| − | A>FILECOPY movcpm.com | + | A>FILECOPY movcpm.com |
Source is 'CPM 2.2 system disc' disk. | Source is 'CPM 2.2 system disc' disk. | ||
Destination is 'Dk'Tronics CPM Disk' disk. | Destination is 'Dk'Tronics CPM Disk' disk. | ||
| Line 29: | Line 29: | ||
This puts movcpm.com onto the disk. | This puts movcpm.com onto the disk. | ||
| − | A>FILECOPY save.com | + | A>FILECOPY save.com |
Source is 'CPM 2.2 system disc' disk. | Source is 'CPM 2.2 system disc' disk. | ||
Destination is 'Dk'Tronics CPM Disk' disk. | Destination is 'Dk'Tronics CPM Disk' disk. | ||
| Line 35: | Line 35: | ||
This puts save.com onto the disk. | This puts save.com onto the disk. | ||
| − | A>FILECOPY newcpm.com | + | A>FILECOPY newcpm.com |
Source is 'Dk'Tronics bank switch software' disk. | Source is 'Dk'Tronics bank switch software' disk. | ||
Destination is 'Dk'Tronics CPM Disk' disk. | Destination is 'Dk'Tronics CPM Disk' disk. | ||
| Line 41: | Line 41: | ||
This transfers Dk'Tronics newcpm.com. | This transfers Dk'Tronics newcpm.com. | ||
| − | A>FILECOPY oldcpm.com | + | A>FILECOPY oldcpm.com |
Source is 'Dk'Tronics bank switch software' disk. | Source is 'Dk'Tronics bank switch software' disk. | ||
Destination is 'Dk'Tronics CPM Disk' disk. | Destination is 'Dk'Tronics CPM Disk' disk. | ||
| Line 49: | Line 49: | ||
Now boot the Dk'Tronics CPM Disk. | Now boot the Dk'Tronics CPM Disk. | ||
| − | A>MOVCPM 255 * | + | A>MOVCPM 255 * |
This configures a 63K CPM. | This configures a 63K CPM. | ||
| − | A>SAVE 34 NEWCPM.SYS | + | A>SAVE 34 NEWCPM.SYS |
This saves a 63K CPM for Dk'Tronics CPM to use. | This saves a 63K CPM for Dk'Tronics CPM to use. | ||
Revision as of 06:06, 20 May 2018
Contents
CPM+
CPM2.2
Creating the DkTronics 61K TPA CPM 2.2
Boot into CPM2.2 from system discs:
A>disckit2
Use disckit2 to format a vendor disc. This will become 'Dk'Tonics CPM Disk'.
A>BOOTGEN
Source is: CPM 2.2 disk Now insert 'Dk'tronics CPM Disk'.
This initialises the boot sector.
A>SYSGEN
Source is CPM2.2 disk Destination is 'Dk'Tronics CPM Disk'
This puts CPM2.2 onto the disc.
A>FILECOPY movcpm.com
Source is 'CPM 2.2 system disc' disk. Destination is 'Dk'Tronics CPM Disk' disk.
This puts movcpm.com onto the disk.
A>FILECOPY save.com
Source is 'CPM 2.2 system disc' disk. Destination is 'Dk'Tronics CPM Disk' disk.
This puts save.com onto the disk.
A>FILECOPY newcpm.com
Source is 'Dk'Tronics bank switch software' disk. Destination is 'Dk'Tronics CPM Disk' disk.
This transfers Dk'Tronics newcpm.com.
A>FILECOPY oldcpm.com
Source is 'Dk'Tronics bank switch software' disk. Destination is 'Dk'Tronics CPM Disk' disk.
This transfers Dk'Tronics oldcpm.com.
Now boot the Dk'Tronics CPM Disk.
A>MOVCPM 255 *
This configures a 63K CPM.
A>SAVE 34 NEWCPM.SYS
This saves a 63K CPM for Dk'Tronics CPM to use.
Your Dk'Tronics CPM is setup.
Technical
- 61K TPA is not active until NEWCPM.COM is run.
- 61K CPM is stored in "NEWCPM.SYS" and is loaded by NEWCPM.COM
NEWCPM.COM
- NEWCPM.COM is a normal COM file. It is loaded like a normal COM file. It resides in memory in bank 0 but configures a 61K CPM in bank 1 and transfers control to it. It remains in bank 0 and implements parts of the 61K CPM BIOS.
- NEWCPM.COM sets up a BIOS jumpblock in page C7 at FC00. This calls into the resident NEWCPM.COM code in bank 0
- NEWCPM.SYS is first loaded to B00 in bank 0, it is later copied into bank 1 to it's correct location.
TPA upper address is &F300. BIOS jump is at FC00. Code after FC00 is part of the BIOS in bank 1.
