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Thanks for all your replies! Very helpful and interesting to read.

Sorry, I replied too quickly, before completely understanding your answer. So I guess indirection is possible! As long as I store the address in zero page

I am not sure it needs to be page0 or page1, but I guess it is like the 6502, where 16 Bit indirect addressing only works in zero-page That's the problem I'm referring to. Only 8-bit indirect addressing is available (for pages 0 and 1). How would I go about to use indirection for any location in RA...

Hi, does anyone have experience of working with 16-bit pointers on the SPC-700? From what I can tell by reading the manual, there is no such addressing mode. (I'm not referring to absolute addressing.) I can't get my head around writing even something as simple as a memory clear routine. How would I...

Thanks!

It seems LYC==0 is early by a time corresponding to about one scanline, compared to the other LYC interrupts.
This loop in the beginning of the interrupt at row zero puts it into phase: (cgb double speed)

Hi,

does anyone know whether the horizontal timing of the LYC interrupt at Y==0 is different to other rows?

It seems the timing, (the number of cycles before the row graphics is shown) is consistent for all rows but the first. At Y==0 the interrupt seems to occur somewhat earlier.

Cheers

Nice! Good thing it was so easy to make it work on your platform. I actually ever ran it on windows xp.

I decided to release the graphics conversion tools I made for the "It Came from Planet Zilog" demo. Here's a link:

https://bitbucket.org/revelj/cgb-tools

Cheers,
Dalton

Well, my problem is not so much finding out where stuff is located (not yet, at least). But the thing is that I wish to avoid the over-complicated construct generated by the compiler in this situation. far void *my_pointer; unsigned char my_bank; my_pointer = (far void *)0x123456; my_bank = (unsigne...

Thank you for your reply! I've had very little luck contacting WDC before :( Even when I asked about purchasing software they did not reply. To be more specific about what I'm trying to do, I have this function which copies data to vram: #define L(x) ((uint8_t)((x)&255)) #define H(x) ((uint8_t)(...

Hi, does anybody know if it's possible to get the bank number from a statically allocated address in wdc 816 c compiler? When I use the shift operator to get the bank number from the 8 high bits of the 24-bit address, then the compiler generate some 24-bit arithmetics code, even though the result of...