Commodore 128 Informations techniques

Commodore 128 assembly programmingInnehåll[göm]1 Introduction2 Documentation3 Assemblers4 Memory management5 VIC features and bugs6 VIC graphics and c

It is possible to use the VDC chip in C64 mode on a C128 but this is not a trivial task since the Kernal in the C64does not support using the VDC chip

the C128 in C64 mode makes it appear as if the computer has crashed since the screen will go blank or will befilled with garbage. The other VIC addres

Documentation"Commodore 128 Programmer's Reference Guide" This is an invaluable book if you want to learn how toprogram in assembly on

For the Commodore 64, the register at address $0001 is used to decide which ROMs that should be switched inand which ROMs that should be switched out.

revision of the 8564-VIC chip. The bug also to a certain degree exists with the 6567-VIC chip in the C64 butthere it is much less visible. Another bug

For both the Commodore 64 and the Commodore 128, the colour RAM occupies the area from address $D800 to$DBE7. However, the Commodore 128 has as mentio

The same 39 Kernal calls as on the Commodore 64 are also available on the Commodore 128. A few of thesecalls differ from the calls made on the Commodo

On the Commodore 64, address $00CB is used to read which key that has been pressed for most keys on thekeyboard. On the Commodore 128, it is instead a

Unfortunately, the 8564-VIC chip cannot handle a clock frequency of 2 MHz, which results in garbage on thescreen. It may therefore be a good idea to b

but it is connected to ground so this means that you can't get interrupts to the Z80 when pressing RESTORE orfrom CIA #2. Furthermore, the I/O po