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When MAPping the CPU, it becomes important for library code to know where a seemingly near address is actually located in the flat memory space (for example, when declaring DMA job lists and trying to…
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Using the latest core and BASIC ROM yields the following behavior: the default sprite mode seems to be full vertical resolution (V400) but poking POKE $D076,0 to disable it does not seem to work.
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As reported in [mega65-user-guide Issue #210](https://github.com/MEGA65/mega65-user-guide/issues/210), the sprite collision interrupts are not firing.
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The problem is that it doesn't setup the contents of reg_val32, and so while it provides A directly as the value to be written, whatever was hanging around in reg_val32 before will have the upper thre…
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It adds the BP register to the _address on the stack that is being referenced_, which really borks things up when BP != 0.
This breaks Jim Nicholl's nice code that uses this opcode to fix another b…
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gs4510.vhdl line 5692 approx ; 32 bit load (e.g. NEG NEG LDA )does not set NZ flags ; verified experimentally on Nexys board.
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As discussed in #220 (and #260) etc,
We want to be able to tell the MAKE-process to either:
- automatic download/compile/use the required tools (to allow a simple build process), or
- use our loc…
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Around GD4510.vhdl again ; and, ora and eor code all do or operations.
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# Project status:
**Highest priority for now**
~So there should be some SD-controller emulation problem, that hickup thinks now, it's not an SDHC card. Though Xemu only emulates SDHC card. As hy…
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Kick Assembler releases >= v5.10 now contain new 65c02 instructions. Replace existing macros and migrate to them. This issue can be assigned to myself.