diff --git a/include/functions.h b/include/functions.h
index 8330903e15..530cedd86e 100644
--- a/include/functions.h
+++ b/include/functions.h
@@ -2222,21 +2222,13 @@ void func_8018450C(PlayState* play, SkeletonInfo* skeleton, Mtx* mtx, OverrideKe
 // void func_801853C8(UNK_TYPE1 param_1, UNK_TYPE1 param_2, UNK_TYPE1 param_3, UNK_TYPE1 param_4, UNK_TYPE4 param_5, UNK_TYPE4 param_6);
 // void func_80185460(void);
 
-// void func_801857C0(void);
-// char* func_801857D0(void);
-// void func_80185864(void);
-u32 func_80185908(void);
-UNK_TYPE func_80185968(void* arg0, UNK_TYPE arg1, UNK_TYPE arg2);
-// void func_801859F0(void);
-// void func_80185A2C(void);
-// void func_80185B1C(void);
-// void func_80185BE4(void);
-// void func_80185C24(void);
-void SysFlashrom_ThreadEntry(s80185D40* param_1);
-void func_80185DDC(u8* arg0, u32 arg1, u32 arg2);
-s32 func_80185EC4(void);
-s32 func_80185F04(void);
-void func_80185F64(void* arg0, UNK_TYPE arg1, UNK_TYPE arg2);
+s32 SysFlashrom_InitFlash(void);
+s32 SysFlashrom_ReadData(void* addr, u32 pageNum, u32 pageCount);
+void SysFlashrom_WriteDataAsync(u8* addr, u32 pageNum, u32 pageCount);
+s32 SysFlashrom_IsBusy(void);
+s32 SysFlashrom_AwaitResult(void);
+void SysFlashrom_WriteDataSync(void* addr, u32 pageNum, u32 pageCount);
+
 s32 func_80185F90(u32 param_1);
 u32 osFlashGetAddr(u32 pageNum);
 OSPiHandle* osFlashReInit(u8 latency, u8 pulse, u8 pageSize, u8 relDuration, u32 start);
diff --git a/include/z64.h b/include/z64.h
index bbcb860e50..b5597f58cf 100644
--- a/include/z64.h
+++ b/include/z64.h
@@ -68,6 +68,7 @@
 #define Z_THREAD_ID_MAIN     3
 #define Z_THREAD_ID_GRAPH    4
 #define Z_THREAD_ID_SCHED    5
+#define Z_THREAD_ID_FLASHROM 13
 #define Z_THREAD_ID_DMAMGR  18
 #define Z_THREAD_ID_IRQMGR  19
 
@@ -76,6 +77,7 @@
 #define Z_PRIORITY_AUDIOMGR 11
 #define Z_PRIORITY_IDLE     12
 #define Z_PRIORITY_MAIN     12
+#define Z_PRIORITY_FLASHROM 13
 #define Z_PRIORITY_PADMGR   15
 #define Z_PRIORITY_SCHED    16
 #define Z_PRIORITY_DMAMGR   17
@@ -118,13 +120,13 @@ typedef struct {
 } NmiBuff; // size >= 0x18
 
 typedef struct {
-    /* 0x00 */ int unk0;
-    /* 0x04 */ void* unk4;
-    /* 0x08 */ int unk8;
-    /* 0x0C */ int unkC;
-    /* 0x10 */ int unk10;
-    /* 0x14 */ OSMesgQueue unk14;
-} s80185D40; // size = 0x2C
+    /* 0x00 */ s32 requestType;
+    /* 0x04 */ OSMesg response;
+    /* 0x08 */ void* addr;
+    /* 0x0C */ s32 pageNum;
+    /* 0x10 */ s32 pageCount;
+    /* 0x14 */ OSMesgQueue messageQueue;
+} FlashromRequest; // size = 0x2C
 
 // End of RDRAM without the Expansion Pak installed
 #define NORMAL_RDRAM_END 0x80400000
@@ -642,6 +644,19 @@ typedef struct {
 #define FRAM_STATUS_REGISTER FRAM_BASE_ADDRESS // FRAM Base Address in Cart Memory
 #define FRAM_COMMAND_REGISTER 0x10000          // Located at 0x08010000 on the Cart
 
+#define FLASH_VERSION_MX_PROTO_A 0x00C20000
+#define FLASH_VERSION_MX_A       0x00C20001
+#define FLASH_VERSION_MX_C       0x00C2001E
+#define FLASH_VERSION_MX_B_AND_D 0x00C2001D
+#define FLASH_VERSION_MEI        0x003200F1
+
+#define FLASH_TYPE_MAGIC 0x11118001
+
+#define FLASH_PAGE_SIZE 128
+
+#define FLASHROM_REQUEST_WRITE 1
+#define FLASHROM_REQUEST_READ 2
+
 enum fram_command {
     /* Does nothing for FRAM_COMMAND_SET_MODE_READ_AND_STATUS, FRAM_MODE_NOP, FRAM_COMMAND_SET_MODE_STATUS_AND_STATUS
        Initializes fram to 0xFF in FRAM_MODE_ERASE
diff --git a/spec b/spec
index 5fe02e11fd..c7c67d830e 100644
--- a/spec
+++ b/spec
@@ -588,7 +588,6 @@ beginseg
     include "build/src/code/c_keyframe.o"
     include "build/src/code/sys_slowly.o"
     include "build/src/code/sys_flashrom.o"
-    include "build/data/code/sys_flashrom.bss.o"
     include "build/asm/code/code_80185F90.text.o" // handwritten
     include "build/src/libultra/flash/osFlash.o"
     pad_text
diff --git a/src/code/sys_flashrom.c b/src/code/sys_flashrom.c
index 0db0b87441..c2665741ee 100644
--- a/src/code/sys_flashrom.c
+++ b/src/code/sys_flashrom.c
@@ -1,44 +1,253 @@
+#include "prevent_bss_reordering.h"
 #include "global.h"
 #include "stack.h"
 #include "stackcheck.h"
 #include "system_malloc.h"
 
-// extern UNK_TYPE1 D_801FBE10;
-// extern UNK_TYPE1 D_801FBE28;
-// extern UNK_TYPE1 D_801FBE2C;
-// extern UNK_TYPE4 D_801FBE30;
-extern STACK(sSysFlashromStack, 0x1000);
-extern StackEntry sSysFlashromStackInfo;
-extern OSThread sSysFlashromThread;
-extern s80185D40 D_801FD008;
-extern OSMesg D_801FD034[1];
+OSMesgQueue sFlashromMesgQueue;
+OSMesg sFlashromMesg[1];
+s32 sFlashromIsInit;
+s32 sFlashromVendor;
 
-#pragma GLOBAL_ASM("asm/non_matchings/code/sys_flashrom/func_801857C0.s")
+STACK(sSysFlashromStack, 0x1000);
+StackEntry sSysFlashromStackInfo;
+OSThread sSysFlashromThread;
+FlashromRequest sFlashromRequest;
+OSMesg sSysFlashromMsgBuf[1];
 
-#pragma GLOBAL_ASM("asm/non_matchings/code/sys_flashrom/func_801857D0.s")
+s32 SysFlashrom_IsInit(void) {
+    return sFlashromIsInit;
+}
 
-#pragma GLOBAL_ASM("asm/non_matchings/code/sys_flashrom/func_80185864.s")
+const char* SysFlashrom_GetVendorStr(void) {
+    switch (sFlashromVendor) {
+        case FLASH_VERSION_MX_PROTO_A:
+            return "PROTO A";
 
-#pragma GLOBAL_ASM("asm/non_matchings/code/sys_flashrom/func_80185908.s")
+        case FLASH_VERSION_MX_A:
+            return "A";
 
-#pragma GLOBAL_ASM("asm/non_matchings/code/sys_flashrom/func_80185968.s")
+        case FLASH_VERSION_MX_C:
+            return "C";
 
-#pragma GLOBAL_ASM("asm/non_matchings/code/sys_flashrom/func_801859F0.s")
+        case FLASH_VERSION_MEI:
+            return "D(NEW)";
 
-#pragma GLOBAL_ASM("asm/non_matchings/code/sys_flashrom/func_80185A2C.s")
+        case FLASH_VERSION_MX_B_AND_D:
+            return "B or D";
 
-#pragma GLOBAL_ASM("asm/non_matchings/code/sys_flashrom/func_80185B1C.s")
+        default:
+            return "UNKNOWN";
+    }
+}
 
-#pragma GLOBAL_ASM("asm/non_matchings/code/sys_flashrom/func_80185BE4.s")
+s32 SysFlashrom_CheckFlashType(void) {
+    u32 flashType;
+    u32 flashVendor;
 
-#pragma GLOBAL_ASM("asm/non_matchings/code/sys_flashrom/func_80185C24.s")
+    if (!SysFlashrom_IsInit()) {
+        return -1;
+    }
+    osFlashReadId(&flashType, &flashVendor);
+    sFlashromVendor = flashVendor;
+    if (flashType == FLASH_TYPE_MAGIC) {
+        if ((flashVendor == FLASH_VERSION_MX_PROTO_A) || (flashVendor == FLASH_VERSION_MX_A) ||
+            (flashVendor == FLASH_VERSION_MX_C) || (flashVendor == FLASH_VERSION_MEI) ||
+            (flashVendor == FLASH_VERSION_MX_B_AND_D)) {
+            return 0;
+        } else {
+            return -1;
+        }
+    }
+    return -1;
+}
 
-#pragma GLOBAL_ASM("asm/non_matchings/code/sys_flashrom/SysFlashrom_ThreadEntry.s")
+s32 SysFlashrom_InitFlash(void) {
+    osCreateMesgQueue(&sFlashromMesgQueue, sFlashromMesg, ARRAY_COUNT(sFlashromMesg));
+    osFlashInit();
+    sFlashromIsInit = true;
+    if (SysFlashrom_CheckFlashType() != 0) {
+        sFlashromIsInit = false;
+        return -1;
+    }
+    return 0;
+}
 
-#pragma GLOBAL_ASM("asm/non_matchings/code/sys_flashrom/func_80185DDC.s")
+s32 SysFlashrom_ReadData(void* addr, u32 pageNum, u32 pageCount) {
+    OSIoMesg msg;
 
-#pragma GLOBAL_ASM("asm/non_matchings/code/sys_flashrom/func_80185EC4.s")
+    if (!SysFlashrom_IsInit()) {
+        return -1;
+    }
+    osInvalDCache(addr, pageCount * FLASH_PAGE_SIZE);
+    osFlashReadArray(&msg, OS_MESG_PRI_NORMAL, pageNum, addr, pageCount, &sFlashromMesgQueue);
+    osRecvMesg(&sFlashromMesgQueue, NULL, OS_MESG_BLOCK);
+    return 0;
+}
 
-#pragma GLOBAL_ASM("asm/non_matchings/code/sys_flashrom/func_80185F04.s")
+s32 SysFlashrom_EraseSector(u32 page) {
+    if (!SysFlashrom_IsInit()) {
+        return -1;
+    }
+    return osFlashSectorErase(page);
+}
 
-#pragma GLOBAL_ASM("asm/non_matchings/code/sys_flashrom/func_80185F64.s")
+s32 SysFlashrom_ExecWrite(void* addr, u32 pageNum, u32 pageCount) {
+    OSIoMesg msg;
+    s32 result;
+    u32 i;
+
+    if (!SysFlashrom_IsInit()) {
+        return -1;
+    }
+    // Ensure the page is always aligned to a sector boundary.
+    if ((pageNum % FLASH_PAGE_SIZE) != 0) {
+        Fault_AddHungupAndCrash("../sys_flashrom.c", 275);
+    }
+    osWritebackDCache(addr, pageCount * FLASH_PAGE_SIZE);
+    for (i = 0; i < pageCount; i++) {
+        osFlashWriteBuffer(&msg, OS_MESG_PRI_NORMAL, (u8*)addr + i * FLASH_PAGE_SIZE, &sFlashromMesgQueue);
+        osRecvMesg(&sFlashromMesgQueue, NULL, OS_MESG_BLOCK);
+        result = osFlashWriteArray(i + pageNum);
+        if (result != 0) {
+            return result;
+        }
+    }
+    return 0;
+}
+
+s32 SysFlashrom_AttemptWrite(void* addr, u32 pageNum, u32 pageCount) {
+    s32 result;
+    s32 i;
+
+    if (!SysFlashrom_IsInit()) {
+        return -1;
+    }
+    osWritebackDCache(addr, pageCount * FLASH_PAGE_SIZE);
+    i = 0;
+failRetry:
+    result = SysFlashrom_EraseSector(pageNum);
+    if (result != 0) {
+        if (i < 3) {
+            i++;
+            goto failRetry;
+        }
+        return result;
+    }
+    result = SysFlashrom_ExecWrite(addr, pageNum, pageCount);
+    if (result != 0) {
+        if (i < 3) {
+            i++;
+            goto failRetry;
+        }
+        return result;
+    }
+    return 0;
+}
+
+// Flash bits can only by flipped with a write from 1 -> 0. Going from 0 -> 1 requires an erasure.
+// This function will try to determine if any sectors need to be erased before writing saving erase cycles.
+s32 SysFlashrom_NeedsToErase(void* data, void* addr, u32 pageCount) {
+    u32 size;
+    u32 i;
+
+    for (i = 0; i < pageCount * FLASH_PAGE_SIZE; i += 4) {
+        if ((*(s32*)data & *(s32*)addr) != *(s32*)addr) {
+            return false;
+        }
+    }
+    return true;
+}
+
+s32 SysFlashrom_WriteData(void* addr, u32 pageNum, u32 pageCount) {
+    void* data;
+    size_t size;
+    s32 ret;
+
+    if (!SysFlashrom_IsInit()) {
+        return -1;
+    }
+    size = pageCount * FLASH_PAGE_SIZE;
+    data = SystemArena_Malloc(size);
+    if (data == NULL) {
+        ret = SysFlashrom_AttemptWrite(addr, pageNum, pageCount);
+    } else {
+        SysFlashrom_ReadData(data, pageNum, pageCount);
+        if (bcmp(data, addr, size) == 0) {
+            ret = 0;
+        } else {
+            // Will always erase the sector even if it wouldn't normally need to.
+            if (SysFlashrom_NeedsToErase(data, addr, pageCount)) {
+                ret = SysFlashrom_AttemptWrite(addr, pageNum, pageCount);
+            } else {
+                ret = SysFlashrom_AttemptWrite(addr, pageNum, pageCount);
+            }
+            if (ret == 0) {
+                SysFlashrom_ReadData(data, pageNum, pageCount);
+                if (bcmp(data, addr, size) == 0) {
+                    ret = 0;
+                } else {
+                    ret = -1;
+                }
+            }
+        }
+        SystemArena_Free(data);
+    }
+    return ret;
+}
+
+void SysFlashrom_ThreadEntry(void* arg) {
+    FlashromRequest* req = (FlashromRequest*)arg;
+
+    switch (req->requestType) {
+        case FLASHROM_REQUEST_WRITE:
+            req->response = SysFlashrom_WriteData(req->addr, req->pageNum, req->pageCount);
+            osSendMesg(&req->messageQueue, req->response, OS_MESG_BLOCK);
+            break;
+
+        case FLASHROM_REQUEST_READ:
+            req->response = SysFlashrom_ReadData(req->addr, req->pageNum, req->pageCount);
+            osSendMesg(&req->messageQueue, req->response, OS_MESG_BLOCK);
+            break;
+    }
+}
+
+void SysFlashrom_WriteDataAsync(u8* addr, u32 pageNum, u32 pageCount) {
+    FlashromRequest* req = &sFlashromRequest;
+    if (SysFlashrom_IsInit()) {
+        req->requestType = FLASHROM_REQUEST_WRITE;
+        req->addr = addr;
+        req->pageNum = pageNum;
+        req->pageCount = pageCount;
+        osCreateMesgQueue(&req->messageQueue, sSysFlashromMsgBuf, ARRAY_COUNT(sSysFlashromMsgBuf));
+        StackCheck_Init(&sSysFlashromStackInfo, sSysFlashromStack, STACK_TOP(sSysFlashromStack), 0, 0x100,
+                        "sys_flashrom");
+        osCreateThread(&sSysFlashromThread, Z_THREAD_ID_FLASHROM, SysFlashrom_ThreadEntry, req,
+                       STACK_TOP(sSysFlashromStack), Z_PRIORITY_FLASHROM);
+        osStartThread(&sSysFlashromThread);
+    }
+}
+
+s32 SysFlashrom_IsBusy(void) {
+    OSMesgQueue* queue = &sFlashromRequest.messageQueue;
+
+    if (!SysFlashrom_IsInit()) {
+        return -1;
+    }
+    return MQ_IS_FULL(queue);
+}
+
+s32 SysFlashrom_AwaitResult(void) {
+    if (!SysFlashrom_IsInit()) {
+        return -1;
+    }
+    osRecvMesg(&sFlashromRequest.messageQueue, NULL, OS_MESG_BLOCK);
+    osDestroyThread(&sSysFlashromThread);
+    StackCheck_Cleanup(&sSysFlashromStackInfo);
+    return sFlashromRequest.response;
+}
+
+void SysFlashrom_WriteDataSync(void* addr, u32 pageNum, u32 pageCount) {
+    SysFlashrom_WriteDataAsync(addr, pageNum, pageCount);
+    SysFlashrom_AwaitResult();
+}
diff --git a/src/code/title_setup.c b/src/code/title_setup.c
index 4e9293ce79..841c301e2a 100644
--- a/src/code/title_setup.c
+++ b/src/code/title_setup.c
@@ -48,7 +48,7 @@ void Setup_SetRegs(void) {
 }
 
 void Setup_InitImpl(SetupState* this) {
-    func_80185908();
+    SysFlashrom_InitFlash();
     SaveContext_Init();
     Setup_SetRegs();
 
diff --git a/src/code/z_sram_NES.c b/src/code/z_sram_NES.c
index 6556adfa75..cfd2305692 100644
--- a/src/code/z_sram_NES.c
+++ b/src/code/z_sram_NES.c
@@ -850,15 +850,15 @@ void Sram_ResetSaveFromMoonCrash(SramContext* sramCtx) {
 
     bzero(sramCtx->saveBuf, SAVE_BUFFER_SIZE);
 
-    if (func_80185968(sramCtx->saveBuf, D_801C67C8[gSaveContext.fileNum * 2], D_801C67F0[gSaveContext.fileNum * 2]) !=
-        0) {
-        func_80185968(sramCtx->saveBuf, D_801C67C8[gSaveContext.fileNum * 2 + 1],
-                      D_801C67F0[gSaveContext.fileNum * 2 + 1]);
+    if (SysFlashrom_ReadData(sramCtx->saveBuf, D_801C67C8[gSaveContext.fileNum * 2],
+                             D_801C67F0[gSaveContext.fileNum * 2]) != 0) {
+        SysFlashrom_ReadData(sramCtx->saveBuf, D_801C67C8[gSaveContext.fileNum * 2 + 1],
+                             D_801C67F0[gSaveContext.fileNum * 2 + 1]);
     }
     Lib_MemCpy(&gSaveContext.save, sramCtx->saveBuf, sizeof(Save));
     if (CHECK_NEWF(gSaveContext.save.saveInfo.playerData.newf)) {
-        func_80185968(sramCtx->saveBuf, D_801C67C8[gSaveContext.fileNum * 2 + 1],
-                      D_801C67F0[gSaveContext.fileNum * 2 + 1]);
+        SysFlashrom_ReadData(sramCtx->saveBuf, D_801C67C8[gSaveContext.fileNum * 2 + 1],
+                             D_801C67F0[gSaveContext.fileNum * 2 + 1]);
         Lib_MemCpy(&gSaveContext, sramCtx->saveBuf, sizeof(Save));
     }
     gSaveContext.save.cutsceneIndex = cutsceneIndex;
@@ -910,27 +910,27 @@ void Sram_OpenSave(FileSelectState* fileSelect, SramContext* sramCtx) {
         bzero(sramCtx->saveBuf, SAVE_BUFFER_SIZE);
 
         if (gSaveContext.fileNum == 0xFF) {
-            func_80185968(sramCtx->saveBuf, D_801C67C8[0], D_801C67F0[0]);
+            SysFlashrom_ReadData(sramCtx->saveBuf, D_801C67C8[0], D_801C67F0[0]);
         } else if (fileSelect->unk_2446A[gSaveContext.fileNum] != 0) {
             phi_t1 = gSaveContext.fileNum + 2;
             phi_t1 *= 2;
 
-            if (func_80185968(sramCtx->saveBuf, D_801C67C8[phi_t1], D_801C67F0[phi_t1]) != 0) {
-                func_80185968(sramCtx->saveBuf, D_801C67C8[phi_t1 + 1], D_801C67F0[phi_t1 + 1]);
+            if (SysFlashrom_ReadData(sramCtx->saveBuf, D_801C67C8[phi_t1], D_801C67F0[phi_t1]) != 0) {
+                SysFlashrom_ReadData(sramCtx->saveBuf, D_801C67C8[phi_t1 + 1], D_801C67F0[phi_t1 + 1]);
             }
         } else {
             phi_t1 = gSaveContext.fileNum;
             phi_t1 *= 2;
 
-            if (func_80185968(sramCtx->saveBuf, D_801C67C8[phi_t1], D_801C67F0[phi_t1]) != 0) {
-                func_80185968(sramCtx->saveBuf, D_801C67C8[phi_t1 + 1], D_801C67F0[phi_t1 + 1]);
+            if (SysFlashrom_ReadData(sramCtx->saveBuf, D_801C67C8[phi_t1], D_801C67F0[phi_t1]) != 0) {
+                SysFlashrom_ReadData(sramCtx->saveBuf, D_801C67C8[phi_t1 + 1], D_801C67F0[phi_t1 + 1]);
             }
         }
 
         Lib_MemCpy(&gSaveContext, sramCtx->saveBuf, D_801C6870[phi_t1]);
 
         if (CHECK_NEWF(gSaveContext.save.saveInfo.playerData.newf)) {
-            func_80185968(sramCtx->saveBuf, D_801C67C8[phi_t1 + 1], D_801C67F0[phi_t1 + 1]);
+            SysFlashrom_ReadData(sramCtx->saveBuf, D_801C67C8[phi_t1 + 1], D_801C67F0[phi_t1 + 1]);
             Lib_MemCpy(&gSaveContext, sramCtx->saveBuf, D_801C6870[phi_t1]);
         }
     }
@@ -1090,9 +1090,9 @@ void func_801457CC(FileSelectState* fileSelect2, SramContext* sramCtx) {
 
             phi_s2 = false;
             sp6E = 0;
-            if (func_80185968(sramCtx->saveBuf, D_801C67C8[sp64], D_801C67F0[sp64])) {
+            if (SysFlashrom_ReadData(sramCtx->saveBuf, D_801C67C8[sp64], D_801C67F0[sp64])) {
                 sp6E = 1;
-                if (func_80185968(sramCtx->saveBuf, D_801C67C8[sp64 + 1], D_801C67F0[sp64 + 1])) {
+                if (SysFlashrom_ReadData(sramCtx->saveBuf, D_801C67C8[sp64 + 1], D_801C67F0[sp64 + 1])) {
                     phi_s2 = true;
                 }
             }
@@ -1115,7 +1115,7 @@ void func_801457CC(FileSelectState* fileSelect2, SramContext* sramCtx) {
                         if (CHECK_NEWF2(gSaveContext.save.saveInfo.playerData.newf)) {}
 
                         phi_s2 = false;
-                        if (func_80185968(sramCtx->saveBuf, D_801C67C8[sp64 + 1], D_801C67F0[sp64 + 1])) {
+                        if (SysFlashrom_ReadData(sramCtx->saveBuf, D_801C67C8[sp64 + 1], D_801C67F0[sp64 + 1])) {
                             phi_s2 = true;
                         }
 
@@ -1171,7 +1171,7 @@ void func_801457CC(FileSelectState* fileSelect2, SramContext* sramCtx) {
                     func_80146EBC(sramCtx, D_801C67C8[sp64], D_801C6818[sp64]);
                 } else if (sp6E == 0) { // TODO: == 0?
                     temp_s2 = gSaveContext.save.saveInfo.checksum;
-                    if (func_80185968(sramCtx->saveBuf, D_801C67C8[sp64 + 1], D_801C67F0[sp64 + 1])) {
+                    if (SysFlashrom_ReadData(sramCtx->saveBuf, D_801C67C8[sp64 + 1], D_801C67F0[sp64 + 1])) {
                         phi_s2_3 = 1;
                     } else {
                         Lib_MemCpy(&gSaveContext.save, sramCtx->saveBuf, sizeof(Save));
@@ -1182,7 +1182,7 @@ void func_801457CC(FileSelectState* fileSelect2, SramContext* sramCtx) {
 
                     if (CHECK_NEWF(gSaveContext.save.saveInfo.playerData.newf) || (phi_s2_3 != sp7A) ||
                         (phi_s2_3 != temp_s2)) {
-                        func_80185968(sramCtx->saveBuf, D_801C67C8[sp64], D_801C67F0[sp64]);
+                        SysFlashrom_ReadData(sramCtx->saveBuf, D_801C67C8[sp64], D_801C67F0[sp64]);
                         Lib_MemCpy(&gSaveContext.save, sramCtx->saveBuf, sizeof(Save));
                         Lib_MemCpy(&sramCtx->saveBuf[0x2000], &gSaveContext.save, sizeof(Save));
                         func_80146EBC(sramCtx, D_801C67C8[sp64], D_801C6818[sp64]);
@@ -1210,7 +1210,7 @@ void func_801457CC(FileSelectState* fileSelect2, SramContext* sramCtx) {
                                 phi_s2 = false;
                             }
 
-                            if (func_80185968(sramCtx->saveBuf, D_801C67C8[sp64 + 1], D_801C67F0[sp64 + 1])) {
+                            if (SysFlashrom_ReadData(sramCtx->saveBuf, D_801C67C8[sp64 + 1], D_801C67F0[sp64 + 1])) {
                                 phi_s2 = true;
                             }
 
@@ -1267,7 +1267,7 @@ void func_801457CC(FileSelectState* fileSelect2, SramContext* sramCtx) {
                         func_80146EBC(sramCtx, D_801C67C8[sp64 + 1], D_801C67F0[sp64 + 1]);
                     } else if (!sp6E) { // TODO: == 0?
                         temp_s2 = gSaveContext.save.saveInfo.checksum;
-                        if (func_80185968(sramCtx->saveBuf, D_801C67C8[sp64 + 1], D_801C67F0[sp64 + 1])) {
+                        if (SysFlashrom_ReadData(sramCtx->saveBuf, D_801C67C8[sp64 + 1], D_801C67F0[sp64 + 1])) {
                             phi_s2_3 = 1;
                         } else {
                             Lib_MemCpy(&gSaveContext, sramCtx->saveBuf, D_801C6870[sp64]);
@@ -1279,7 +1279,7 @@ void func_801457CC(FileSelectState* fileSelect2, SramContext* sramCtx) {
 
                         if (CHECK_NEWF(gSaveContext.save.saveInfo.playerData.newf) || (phi_s2_3 != sp7A) ||
                             (phi_s2_3 != temp_s2)) {
-                            func_80185968(sramCtx->saveBuf, D_801C67C8[sp64], D_801C67F0[sp64]);
+                            SysFlashrom_ReadData(sramCtx->saveBuf, D_801C67C8[sp64], D_801C67F0[sp64]);
                             Lib_MemCpy(&gSaveContext, sramCtx->saveBuf, D_801C6870[sp64]);
                             func_80146EBC(sramCtx, D_801C67C8[sp64], D_801C67F0[sp64]);
                             func_80146EBC(sramCtx, D_801C67C8[sp64 + 1], D_801C67F0[sp64 + 1]);
@@ -1381,11 +1381,12 @@ void func_80146628(FileSelectState* fileSelect2, SramContext* sramCtx) {
         // clear buffer
         bzero(sramCtx->saveBuf, SAVE_BUFFER_SIZE);
         // read to buffer
-        func_80185968(sramCtx->saveBuf, D_801C67C8[fileSelect->unk_2448E * 2], D_801C67F0[fileSelect->unk_2448E * 2]);
+        SysFlashrom_ReadData(sramCtx->saveBuf, D_801C67C8[fileSelect->unk_2448E * 2],
+                             D_801C67F0[fileSelect->unk_2448E * 2]);
 
         if (1) {}
-        func_80185968(&sramCtx->saveBuf[0x2000], D_801C67C8[fileSelect->unk_2448E * 2 + 1],
-                      D_801C67F0[fileSelect->unk_2448E * 2 + 1]);
+        SysFlashrom_ReadData(&sramCtx->saveBuf[0x2000], D_801C67C8[fileSelect->unk_2448E * 2 + 1],
+                             D_801C67F0[fileSelect->unk_2448E * 2 + 1]);
         if (1) {}
 
         // copy buffer to save context
@@ -1518,7 +1519,7 @@ void Sram_Alloc(GameState* gameState, SramContext* sramCtx) {
 void func_80146EBC(SramContext* sramCtx, s32 curPage, s32 numPages) {
     sramCtx->curPage = curPage;
     sramCtx->numPages = numPages;
-    func_80185F64(sramCtx->saveBuf, curPage, numPages);
+    SysFlashrom_WriteDataSync(sramCtx->saveBuf, curPage, numPages);
 }
 
 /**
@@ -1531,7 +1532,8 @@ void Sram_SaveSpecialEnterClockTown(PlayState* play) {
     gSaveContext.save.isFirstCycle = true;
     gSaveContext.save.isOwlSave = false;
     func_80145698(sramCtx);
-    func_80185F64(sramCtx->saveBuf, D_801C67C8[gSaveContext.fileNum * 2], D_801C6818[gSaveContext.fileNum * 2]);
+    SysFlashrom_WriteDataSync(sramCtx->saveBuf, D_801C67C8[gSaveContext.fileNum * 2],
+                              D_801C6818[gSaveContext.fileNum * 2]);
 }
 
 /**
@@ -1552,7 +1554,8 @@ void Sram_SaveSpecialNewDay(PlayState* play) {
     gSaveContext.save.day = day;
     gSaveContext.save.time = time;
     gSaveContext.save.cutsceneIndex = cutsceneIndex;
-    func_80185F64(play->sramCtx.saveBuf, D_801C67C8[gSaveContext.fileNum * 2], D_801C67F0[gSaveContext.fileNum * 2]);
+    SysFlashrom_WriteDataSync(play->sramCtx.saveBuf, D_801C67C8[gSaveContext.fileNum * 2],
+                              D_801C67F0[gSaveContext.fileNum * 2]);
 }
 
 void func_80147008(SramContext* sramCtx, u32 curPage, u32 numPages) {
@@ -1563,7 +1566,7 @@ void func_80147008(SramContext* sramCtx, u32 curPage, u32 numPages) {
 
 void func_80147020(SramContext* sramCtx) {
     // async flash write
-    func_80185DDC(sramCtx->saveBuf, sramCtx->curPage, sramCtx->numPages);
+    SysFlashrom_WriteDataAsync(sramCtx->saveBuf, sramCtx->curPage, sramCtx->numPages);
 
     sramCtx->unk_18 = osGetTime();
     sramCtx->status = 2;
@@ -1571,8 +1574,8 @@ void func_80147020(SramContext* sramCtx) {
 
 void func_80147068(SramContext* sramCtx) {
     if (sramCtx->status == 2) {
-        if (func_80185EC4() != 0) {     // if task running
-            if (func_80185F04() == 0) { // wait for task done
+        if (SysFlashrom_IsBusy() != 0) {          // if task running
+            if (SysFlashrom_AwaitResult() == 0) { // wait for task done
                 // task success
                 sramCtx->status = 4;
             } else {
@@ -1592,7 +1595,7 @@ void func_80147138(SramContext* sramCtx, s32 curPage, s32 numPages) {
 }
 
 void func_80147150(SramContext* sramCtx) {
-    func_80185DDC(sramCtx->saveBuf, sramCtx->curPage, sramCtx->numPages);
+    SysFlashrom_WriteDataAsync(sramCtx->saveBuf, sramCtx->curPage, sramCtx->numPages);
 
     sramCtx->unk_18 = osGetTime();
     sramCtx->status = 7;
@@ -1600,18 +1603,18 @@ void func_80147150(SramContext* sramCtx) {
 
 void func_80147198(SramContext* sramCtx) {
     if (sramCtx->status == 7) {
-        if (func_80185EC4() != 0) {     // Is task running
-            if (func_80185F04() == 0) { // Wait for task done
-                func_80185DDC(sramCtx->saveBuf, sramCtx->curPage + 0x80, sramCtx->numPages);
+        if (SysFlashrom_IsBusy() != 0) {          // Is task running
+            if (SysFlashrom_AwaitResult() == 0) { // Wait for task done
+                SysFlashrom_WriteDataAsync(sramCtx->saveBuf, sramCtx->curPage + 0x80, sramCtx->numPages);
                 sramCtx->status = 8;
             } else {
-                func_80185DDC(sramCtx->saveBuf, sramCtx->curPage + 0x80, sramCtx->numPages);
+                SysFlashrom_WriteDataAsync(sramCtx->saveBuf, sramCtx->curPage + 0x80, sramCtx->numPages);
                 sramCtx->status = 8;
             }
         }
     } else if (sramCtx->status == 8) {
-        if (func_80185EC4() != 0) {     // Is task running
-            if (func_80185F04() == 0) { // Wait for task done
+        if (SysFlashrom_IsBusy() != 0) {          // Is task running
+            if (SysFlashrom_AwaitResult() == 0) { // Wait for task done
                 sramCtx->status = 4;
             } else {
                 sramCtx->status = 4;
@@ -1623,7 +1626,7 @@ void func_80147198(SramContext* sramCtx) {
         gSaveContext.save.isOwlSave = false;
         gSaveContext.save.saveInfo.checksum = 0;
         // flash read to buffer then copy to save context
-        func_80185968(sramCtx->saveBuf, sramCtx->curPage, sramCtx->numPages);
+        SysFlashrom_ReadData(sramCtx->saveBuf, sramCtx->curPage, sramCtx->numPages);
         Lib_MemCpy(&gSaveContext, sramCtx->saveBuf, offsetof(SaveContext, fileNum));
     }
 }
@@ -1664,9 +1667,9 @@ void func_80147414(SramContext* sramCtx, s32 fileNum, s32 arg2) {
     bzero(sramCtx->saveBuf, SAVE_BUFFER_SIZE);
 
     // Read save file
-    if (func_80185968(sramCtx->saveBuf, D_801C6840[fileNum * 2], D_801C6850[fileNum * 2]) != 0) {
+    if (SysFlashrom_ReadData(sramCtx->saveBuf, D_801C6840[fileNum * 2], D_801C6850[fileNum * 2]) != 0) {
         // If failed, read backup save file
-        func_80185968(sramCtx->saveBuf, D_801C6840[fileNum * 2 + 1], D_801C6850[fileNum * 2 + 1]);
+        SysFlashrom_ReadData(sramCtx->saveBuf, D_801C6840[fileNum * 2 + 1], D_801C6850[fileNum * 2 + 1]);
     }
 
     // Copy buffer to save context
diff --git a/tools/disasm/functions.txt b/tools/disasm/functions.txt
index b1d42739b9..fa886e81cf 100644
--- a/tools/disasm/functions.txt
+++ b/tools/disasm/functions.txt
@@ -3447,21 +3447,21 @@
     0x801856FC:("Slowly_ThreadEntry",),
     0x8018571C:("Slowly_Init",),
     0x801857A0:("Slowly_Destroy",),
-    0x801857C0:("func_801857C0",),
-    0x801857D0:("func_801857D0",),
-    0x80185864:("func_80185864",),
-    0x80185908:("func_80185908",),
-    0x80185968:("func_80185968",),
-    0x801859F0:("func_801859F0",),
-    0x80185A2C:("func_80185A2C",),
-    0x80185B1C:("func_80185B1C",),
-    0x80185BE4:("func_80185BE4",),
+    0x801857C0:("SysFlashrom_IsInit",),
+    0x801857D0:("SysFlashrom_GetVendorStr",),
+    0x80185864:("SysFlashrom_CheckFlashType",),
+    0x80185908:("SysFlashrom_InitFlash",),
+    0x80185968:("SysFlashrom_ReadData",),
+    0x801859F0:("SysFlashrom_EraseSector",),
+    0x80185A2C:("SysFlashrom_ExecWrite",),
+    0x80185B1C:("SysFlashrom_AttemptWrite",),
+    0x80185BE4:("SysFlashrom_NeedsToErase",),
     0x80185C24:("func_80185C24",),
     0x80185D40:("SysFlashrom_ThreadEntry",),
-    0x80185DDC:("func_80185DDC",),
-    0x80185EC4:("func_80185EC4",),
-    0x80185F04:("func_80185F04",),
-    0x80185F64:("func_80185F64",),
+    0x80185DDC:("SysFlashrom_WriteDataAsync",),
+    0x80185EC4:("SysFlashrom_IsBusy",),
+    0x80185F04:("SysFlashrom_AwaitResult",),
+    0x80185F64:("SysFlashrom_WriteDataSync",),
     0x80185F90:("func_80185F90",),
     0x80186A70:("osFlashGetAddr",),
     0x80186AB8:("osFlashReInit",),
diff --git a/tools/disasm/variables.txt b/tools/disasm/variables.txt
index 6f08583ace..15bebeffdd 100644
--- a/tools/disasm/variables.txt
+++ b/tools/disasm/variables.txt
@@ -4193,14 +4193,14 @@
     0x801FBDE8:("D_801FBDE8","Vec3f","",0xc),
     0x801FBE00:("sMatrixStack","MtxF*","",0x4),
     0x801FBE04:("sCurrentMatrix","MtxF*","",0x4),
-    0x801FBE10:("D_801FBE10","UNK_TYPE1","",0x1),
-    0x801FBE28:("D_801FBE28","UNK_TYPE1","",0x1),
-    0x801FBE2C:("D_801FBE2C","UNK_TYPE1","",0x1),
-    0x801FBE30:("D_801FBE30","UNK_TYPE4","",0x4),
+    0x801FBE10:("sFlashromMesgQueue","UNK_TYPE1","",0x1),
+    0x801FBE28:("sFlashromMesg","UNK_TYPE1","",0x1),
+    0x801FBE2C:("sFlashromIsInit","UNK_TYPE1","",0x1),
+    0x801FBE30:("sFlashromVendor","UNK_TYPE4","",0x4),
     0x801FBE38:("sSysFlashromStack","u8","[4096]",0x1000),
     0x801FCE38:("sSysFlashromStackInfo","StackEntry","",0x1c),
     0x801FCE58:("sSysFlashromThread","OSThread","",0x1b0),
-    0x801FD008:("D_801FD008","s80185D40","",0x2c),
+    0x801FD008:("sFlashromRequest","s80185D40","",0x2c),
     0x801FD034:("D_801FD034","OSMesg","",0x4),
     0x801FD040:("D_801FD040","s32","",0x10),
     0x801FD050:("D_801FD050","OSIoMesg","",0x18),
diff --git a/tools/sizes/code_functions.csv b/tools/sizes/code_functions.csv
index 34318dc271..419a7a4bee 100644
--- a/tools/sizes/code_functions.csv
+++ b/tools/sizes/code_functions.csv
@@ -2962,20 +2962,21 @@ asm/non_matchings/code/sys_slowly/Slowly_ThreadEntry.s,Slowly_ThreadEntry,0x8018
 asm/non_matchings/code/sys_slowly/Slowly_Init.s,Slowly_Init,0x8018571C,0x21
 asm/non_matchings/code/sys_slowly/Slowly_Destroy.s,Slowly_Destroy,0x801857A0,0x8
 asm/non_matchings/code/sys_flashrom/func_801857C0.s,func_801857C0,0x801857C0,0x4
-asm/non_matchings/code/sys_flashrom/func_801857D0.s,func_801857D0,0x801857D0,0x25
-asm/non_matchings/code/sys_flashrom/func_80185864.s,func_80185864,0x80185864,0x29
-asm/non_matchings/code/sys_flashrom/func_80185908.s,func_80185908,0x80185908,0x18
-asm/non_matchings/code/sys_flashrom/func_80185968.s,func_80185968,0x80185968,0x22
-asm/non_matchings/code/sys_flashrom/func_801859F0.s,func_801859F0,0x801859F0,0xF
-asm/non_matchings/code/sys_flashrom/func_80185A2C.s,func_80185A2C,0x80185A2C,0x3C
-asm/non_matchings/code/sys_flashrom/func_80185B1C.s,func_80185B1C,0x80185B1C,0x32
-asm/non_matchings/code/sys_flashrom/func_80185BE4.s,func_80185BE4,0x80185BE4,0x10
+asm/non_matchings/code/sys_flashrom/SysFlashrom_IsInit.s,SysFlashrom_IsInit,0x801857C0,0x4
+asm/non_matchings/code/sys_flashrom/SysFlashrom_GetVendorStr.s,SysFlashrom_GetVendorStr,0x801857D0,0x25
+asm/non_matchings/code/sys_flashrom/SysFlashrom_CheckFlashType.s,SysFlashrom_CheckFlashType,0x80185864,0x29
+asm/non_matchings/code/sys_flashrom/SysFlashrom_InitFlash.s,SysFlashrom_InitFlash,0x80185908,0x18
+asm/non_matchings/code/sys_flashrom/SysFlashrom_ReadData.s,SysFlashrom_ReadData,0x80185968,0x22
+asm/non_matchings/code/sys_flashrom/SysFlashrom_EraseSector.s,SysFlashrom_EraseSector,0x801859F0,0xF
+asm/non_matchings/code/sys_flashrom/SysFlashrom_ExecWrite.s,SysFlashrom_ExecWrite,0x80185A2C,0x3C
+asm/non_matchings/code/sys_flashrom/SysFlashrom_AttemptWrite.s,SysFlashrom_AttemptWrite,0x80185B1C,0x32
+asm/non_matchings/code/sys_flashrom/SysFlashrom_NeedsToErase.s,SysFlashrom_NeedsToErase,0x80185BE4,0x10
 asm/non_matchings/code/sys_flashrom/func_80185C24.s,func_80185C24,0x80185C24,0x47
 asm/non_matchings/code/sys_flashrom/SysFlashrom_ThreadEntry.s,SysFlashrom_ThreadEntry,0x80185D40,0x27
-asm/non_matchings/code/sys_flashrom/func_80185DDC.s,func_80185DDC,0x80185DDC,0x3A
-asm/non_matchings/code/sys_flashrom/func_80185EC4.s,func_80185EC4,0x80185EC4,0x10
-asm/non_matchings/code/sys_flashrom/func_80185F04.s,func_80185F04,0x80185F04,0x18
-asm/non_matchings/code/sys_flashrom/func_80185F64.s,func_80185F64,0x80185F64,0xB
+asm/non_matchings/code/sys_flashrom/SysFlashrom_WriteDataAsync.s,SysFlashrom_WriteDataAsync,0x80185DDC,0x3A
+asm/non_matchings/code/sys_flashrom/SysFlashrom_IsBusy.s,SysFlashrom_IsBusy,0x80185EC4,0x10
+asm/non_matchings/code/sys_flashrom/SysFlashrom_AwaitResult.s,SysFlashrom_AwaitResult,0x80185F04,0x18
+asm/non_matchings/code/sys_flashrom/SysFlashrom_WriteDataSync.s,SysFlashrom_WriteDataSync,0x80185F64,0xB
 asm/non_matchings/code/code_80185F90/func_80185F90.s,func_80185F90,0x80185F90,0x26
 asm/non_matchings/code/osFlash/func_80186A70.s,func_80186A70,0x80186A70,0x12
 asm/non_matchings/code/osFlash/func_80186AB8.s,func_80186AB8,0x80186AB8,0x1C