Move ROM to separate git repository

config.toml

@@ -1,8 +1,8 @@
-symbol_tables = ["rom/rom.elf"]
+symbol_tables = []
 
 [[cards]]
 type = "rom"
-image = "rom/rom.bin"
+image = "../rom/rom.bin"
 
 [[cards]]
 type = "ram"

ram_map.c

@@ -1,53 +0,0 @@
-#include <stdint.h>
-
-uint8_t find_all_ram_cards(uint8_t* buf /* a1 */) {
-	uint8_t len = 0; // move.b 0, d0
-	void* curr_card = (void*)0xff0000; // a0 = 0xff0000
-	while(1) { // farc_loop:
-		curr_card += 0x100; // lea (0x100, a0), a0 
-		uint8_t type = *((uint8_t*)(curr_card+0xff)); // move.b (0xff, a0), d0
-		if (type == 0) { // beq.b farc_done
-			break;
-		}
-		if (type != 2) { // cmp.b #0x2, d0; bne.b farc_loop
-    	continue; 
-		}
-		*buf = (uint8_t)((uint32_t)curr_card>>16);
-		buf += 1; // inc a1
-		len += 1; // inc d1
-	} // bra.b farc_loop
-	// farc_done:
-	return len;
-}
-
-void sort_ram_cards(uint8_t* buf) {
-	uint8_t len = find_all_ram_cards(buf);
-	// Insertion sort buf using the aligment of the cards
-	uint8_t i = 1;
-	while(1) {
-		if (i >= len) {
-			break;
-		}
-		uint8_t num = buf[i];
-		void* card = (void*)((uint32_t)num<<16);
-		*((uint32_t*)card)=0xfffffffe;
-		uint32_t x = ~(*((uint32_t*)card)) + 1;
-		uint8_t j = i - 1;
-		while(1) {
-			if (j == 0) {
-				break;
-			}
-			uint8_t num = buf[j];
-			void* card = (void*)((uint32_t)num<<16);
-			*((uint32_t*)card)=0xfffffffe;
-			uint32_t aj = ~(*((uint32_t*)card)) + 1;
-			if (aj <= x) {
-				break;
-			}
-			buf[j + 1] = buf[j];
-			j = j - 1;
-		}
-		buf[j + 1] = buf[i];
-		i = i + 1;
-	}
-}

rom/build_rom.sh

@@ -1,5 +0,0 @@
-#! /bin/bash -x
-m68k-elf-as -m68010 --register-prefix-optional -o rom.o rom.68k
-m68k-elf-ld -z max-page-size=1 -T rom.ld -o rom.elf rom.o
-m68k-elf-objcopy -O binary rom.elf rom.bin
-

rom/rom.68k

@@ -1,79 +0,0 @@
-  .long fakestack, start
-start:
-  move.b #0x1, d0 | Find the ROM card
-  bra.b find_first_card
-romfindret:
-  move.l a0, a6 | Save the ROM card IO base in a6 for later
-  lea (0xF0, a6), a7 | Set up the stack at the end of the ROM's IO space RAM
-  bsr.b find_largest_ram | Find the largest RAM card and put the IO base in a5
-  move.l a0, a5
-  move.l d0, d7
-  move.b #0x4, d0 | Find a storage card and put the IO base in a4
-  bsr.b find_first_card
-  move.l a0, a4
-  | Transfer the bootsector load code to the ROM's
-  | built in RAM at the start of it's IO space
-  move.w #(ramcode_end - ramcode), d0 | Put the length of the ramcode in d0
-  move.w #ramcode, a0 | Put the address of the ramcode in a0
-  move.l a6, a1 | Put the start of the ROM's IO space RAM in a0
-  ramcode_loop:
-  move.b (a0)+, (a1)+ | Transfer a byte of ramcode to the ROM's IO space RAM
-  dbra d0, ramcode_loop | Loop back if there is more to transfer
-  jmp (a6) | Jump to the ramcode
-  stop #0x2700
-
-ramcode:
-  move.b #0x0, (0xFE, a6) | Disable the ROM
-  move.l #0x1, (a5) | Enable the RAM at base 0x0
-  move.l d7, a7
-  | Load sector 0 to 0x0
-  move.l #0x0, (a4) | Set the sector number to 0
-  | Transfer 0x100 (256) bytes from the storage card's data register to 0x0
-  move.w #0x0, a1 | Load a1, the destination address register, with 0x0
-  move.w #0xFF, d0 | Load d0 with the sector size - 1.
-  sector_loop:
-  move.b (4, a4), (a1)+ | Transfer a byte of sector data to the destination
-  dbra d0, sector_loop | Loop back if there is more to transfer
-  jmp (0x0).W | Jump to the loaded sector
-
-  stop #0x2700 
-ramcode_end:
-
-nop | Padding to make sure ramcode_end and find_first_card are different
-
-| Finds the first card with the type in d0.b, and returns it's IO base address in a0, or 0 if not found
-| Clobbers d1
-find_first_card:
-  move.l #0xff0000, a0 | a0 holds the address of the current card
-ffc_loop:
-  lea (0x100,a0), a0 | adda.l #$100,a0 ; Move to the next card
-  move.b (0xff, a0), d1 | Load the type of the card into d1
-  beq.b ffc_done | If the type is 0 (empty slot), we have scanned all cards, so exit the loop
-  cmp.b d0, d1 | If the card is the type we want, return with the address in a0
-  beq.b ffc_done
-  bra.b ffc_loop | Loop back and check the next card
-ffc_done:
-  rts
-
-| Finds the largest RAM card, and returns it's IO base address in a0 and size in d0, or 0 if not found
-| Clobbers d1, a1
-find_largest_ram:
-  move.l #0x0, d0 | d0 holds the size of the largest RAM card found
-  move.w #0x0, a0 | a0 holds the address of the largest RAM card found
-  move.l #0xff0000, a1 | a1 holds the address of the current card
-flr_loop:
-  lea (0x100,a1), a1 | adda.l #$100,a0 ; Move to the next card
-  move.b (0xff, a1), d1 | Load the type of the card into d1
-  beq.b flr_done | If the type is 0 (empty slot), we have scanned all cards, so exit the loop
-  cmp.b #0x2, d1 | If the card isn't a RAM card, skip it
-  bne.b flr_loop
-  move.l (0x4, a1), d1 | Load the card's size into d1
-  cmp.l d0, d1 | If the current size is less than the largest size found, go back to the start of the loop
-  ble.b flr_loop
-  move.l d1, d0 | Store the size and address of the new largest card in d0 and a0
-  move.l a1, a0
-  bra.b flr_loop | Loop back and check the next card
-flr_done:
-  rts
-fakestack: 
-  .long romfindret

rom/rom.ld

@@ -1,5 +0,0 @@
-SECTIONS {
-  . = 0x0;
-  _etext = .;
-  .text : { *(.text) }
-}