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Changes to macros and parameter list syntax:

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* non-asm macros can now take `const` and `call` parameters
* register parameters to asm functions and macros can be given names if annotated explicitly
This commit is contained in:
Karol Stasiak
2020-03-30 19:23:48 +02:00
parent 5cdc599b1d
commit 63ff28e94e
50 changed files with 465 additions and 191 deletions
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docs/stdlib/nes.md
+7 -7
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@@ -41,7 +41,7 @@ Get joypad2's state as a byte.
Simulates a hardware reset by jumping to the reset vector,
which then calls main().
#### `void ppu_set_addr(word ax)`
#### `void ppu_set_addr(word register(ax) address)`
Sets the PPU to point at the VRAM address at ax, usually in preparation
for a write via ppu_write_data().
@@ -50,18 +50,18 @@ for a write via ppu_write_data().
Gets the PPU status byte.
#### `void ppu_set_scroll(byte a, byte x)`
#### `void ppu_set_scroll(byte register(a) xscroll, byte register(x) yscroll)`
Sets the PPU scroll register. Parameter a defines the horizontal
(X-axis) scroll value, and parameter x defines the vertical (Y-axis)
scroll value.
#### `void ppu_write_data(byte a)`
#### `void ppu_write_data(byte register(a) data)`
Writes a byte to the PPU's VRAM at the address the PPU
is currently pointing to. Usually used after a call to ppu_set_addr().
#### `void ppu_oam_dma_write(byte a)`
#### `void ppu_oam_dma_write(byte register(a) page)`
Initiates a DMA transfer of 256 bytes from CPU memory address $xx00-$xxFF
to PPU OAM memory, where xx is the hexadecimal representation of parameter a.
@@ -71,18 +71,18 @@ to PPU OAM memory, where xx is the hexadecimal representation of parameter a.
The `nes_mmc4` module is imported automatically on the NES MMC4 target
and contains routines related to MMC4 bankswitching.
#### `void set_prg_bank(byte a)`
#### `void set_prg_bank(byte register(a) bank)`
Changes the $8000-$BFFF PRG bank.
#### `void set_chr_bank0(byte a)`
#### `void set_chr_bank0(byte register(a) bank)`
Changes the CHR bank 0 ($0000-$0fff in the PPU memory space).
The high nibble (0 or 1) selects between `chrrom0` and `chrrom1` segments.
The low nibble L (0-$F) selects a 4K-aligned address in the segment ($L000).
#### `void set_chr_bank1(byte a)`
#### `void set_chr_bank1(byte register(a) bank)`
Changes the CHR bank 1 ($1000-$1fff in the PPU memory space).
docs/stdlib/stdlib.md
+3 -3
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@@ -4,7 +4,7 @@
The `stdlib` module is automatically imported on most targets.
#### `macro asm void poke(word const addr, byte a)`
#### `macro asm void poke(word const addr, byte register(a) value)`
Stores a byte at given constant address. Will not be optimized away by the optimizer.
@@ -20,11 +20,11 @@ Disables interrupts.
Enables interrupts.
#### `byte hi_nibble_to_hex(byte a)`
#### `byte hi_nibble_to_hex(byte register(a) value)`
Returns an ASCII representation of the upper nibble of the given byte.
#### `byte lo_nibble_to_hex(byte a)`
#### `byte lo_nibble_to_hex(byte register(a) value)`
Returns an ASCII representation of the lower nibble of the given byte.