New answers tagged commodore-128
9
In the Commodore 128, the Video Display Controller (VDC) was used for the 80-column mode. Two variants of the VDC were used, the 8563 and the 8568.
Looking at the POKEs, the address 54784 ($D600) is the index register for the VDC, while 54785 ($D601) is the data register.
So those two POKEs write the value 232 ($E8) to register 9 of the VDC.
Register 9 is ...
11
The maximum size file that you can load with the built-in commands is 65280 bytes. This is using the address range of $0000-$FEFF for either BANK. There is no "wrap" ability to extend from bank 0 to 1.
All of the BASIC commands (LOAD, DLOAD, BLOAD) rely on the kernal ILOAD code. The limitation is that the ILOAD code will not continue loading once ...
3
What is the largest single file that can be loaded into a C128 using standard Kernal functions (i.e., LOAD, DLOAD, BLOAD).
LOAD and DLOAD load only as many bytes as given by the file information. In addition they only work reliably with Bank0 and paged in Kernal (*1).
BLOAD, by contrast, can load up to 65535 bytes (one less than 64 KiB) into any bank. So ...
11
You can absolutely do this, I've used a 6 foot extension like this before on my 128DCR with no signaling issues. You are correct that you need all 25 pins wired straight through which a normal DB25m/f cable for serial / modem won't provide (and a normal Centronics cable obviously has the wrong connector on one end). You need to look for a IEEE 1284 DB25 M/...
7
I think it may be as easy as connecting male pins from one side to corresponding female pins on the other side,
Exactly that.
but need reassurance please. Would be shame to blow something up.
For what? I mean, which logic gives that a strict 1:1 connection can blow up anything? After all, i1:1 means that there are no other connections made, doesn't it?
I ...
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