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Added scramble flags to RGBLINK. (#921)

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* Add scramble flags to RGBLINK

-S and -W will scramble ROMX and WRAMX respectively.

* Modify scramble CLI

CLI now takes a list of comma-separated values.
Added arg_error to clean up messages.

Co-authored-by: Eldred Habert <eldredhabert0@gmail.com>

* Document scrambling functionality

Co-authored-by: Eldred Habert <eldredhabert0@gmail.com>
This commit is contained in:
Eievui
2021-10-31 17:58:26 -04:00
committed by GitHub
parent 11a6a81169
commit 8b1cc72f09
5 changed files with 254 additions and 22 deletions
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25
src/link/assign.c
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@@ -159,9 +159,28 @@ static bool isLocationSuitable(struct Section const *section,
static struct FreeSpace *getPlacement(struct Section const *section,
struct MemoryLocation *location)
{
location->bank = section->isBankFixed
? section->bank
: bankranges[section->type][0];
static uint16_t curScrambleROM = 1;
static uint8_t curScrambleWRAM = 1;
static uint8_t curScrambleSRAM = 1;
// Determine which bank we should start searching in
if (section->isBankFixed) {
location->bank = section->bank;
} else if (scrambleROMX && section->type == SECTTYPE_ROMX) {
location->bank = curScrambleROM++;
if (curScrambleROM > scrambleROMX)
curScrambleROM = 1;
} else if (scrambleWRAMX && section->type == SECTTYPE_WRAMX) {
location->bank = curScrambleWRAM++;
if (curScrambleWRAM > scrambleWRAMX)
curScrambleWRAM = 1;
} else if (scrambleSRAM && section->type == SECTTYPE_SRAM) {
location->bank = curScrambleSRAM++;
if (curScrambleSRAM > scrambleSRAM)
curScrambleSRAM = 0;
} else {
location->bank = bankranges[section->type][0];
}
struct FreeSpace *space;
for (;;) {