Changeset 620 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS_Configurator_v2/Src/Buffers.asm

Timestamp:

Oct 5, 2021, 1:01:04 PM (4 years ago)

Author:

Krister Nordvall

Message:

Changes:

• A huge thank you to Jayeson Lee-Steere for adding SST39SF0x0 flash ROM programming support to the configurator (XTIDECFG.COM). This means that there is no longer a need to use a separate program for flashing the Lo-Tech boards and other devices using these flash ROMs.

File:

• trunk/XTIDE_Universal_BIOS_Configurator_v2/Src/Buffers.asm (modified) (3 diffs)

trunk/XTIDE_Universal_BIOS_Configurator_v2/Src/Buffers.asm

@@ -173 +173 @@
     ret
 
+;--------------------------------------------------------------------
+; Buffers_GetSelectedEepromSizeInWordsToAX
+;   Parameters:
+;       Nothing
+;   Returns:
+;       AX:     Selected EEPROM size in WORDs
+;   Corrupts registers:
+;       BX
+;--------------------------------------------------------------------
+ALIGN JUMP_ALIGN
+Buffers_GetSelectedEepromSizeInWordsToAX:
+    eMOVZX  bx, [cs:g_cfgVars+CFGVARS.bEepromType]
+    mov     ax, [cs:bx+g_rgwEepromTypeToSizeInWords]
+
+    cmp     bl, EEPROM_TYPE.SST_39SF
+    jnz     SHORT .HaveEepromSize
+    cmp     ax, [cs:g_cfgVars+CFGVARS.wImageSizeInWords]
+    jae     SHORT .HaveEepromSize       
+    shl     ax, 1   ; Auto-double SST size when too small.
+.HaveEepromSize:
+    ret
 
 ;--------------------------------------------------------------------
@@ -181 +202 @@
 ;       Nothing
 ;   Corrupts registers:
-;       AX, CX, DI
+;       AX, BX, CX, DI
 ;--------------------------------------------------------------------
 ALIGN JUMP_ALIGN
@@ -187 +208 @@
     push    es
 
-    eMOVZX  di, [cs:g_cfgVars+CFGVARS.bEepromType]
-    mov     cx, [cs:di+g_rgwEepromTypeToSizeInWords]
+    call    Buffers_GetSelectedEepromSizeInWordsToAX
+    mov     cx, ax
     sub     cx, [cs:g_cfgVars+CFGVARS.wImageSizeInWords]    ; CX = WORDs to append
     jbe     SHORT .NoNeedToAppendZeroes