Changeset 601 in xtideuniversalbios for trunk/XTIDE_Universal_BIOS/Inc/IDE_8bit.inc

Timestamp:

Feb 14, 2019, 7:38:08 PM (5 years ago)

Author:

krille_n_

Message:

Changes:

• Building the BIOS now works again.
• Added a new IDE device type/transfer mode for use only with XT-IDE rev 2+ (or Chuck(G)-modded rev 1) cards installed in any of the following machines: Olivetti M24, AT&T PC6300, Xerox 6060 and Logabax Persona 1600. This new transfer mode is slightly faster than the regular XT-IDE rev 1 device type and requires that the card is configured for High Speed mode (or, in case of the card being a rev 1 card, has the Chuck(G) mod done). The new device type is called "XTIDE rev 2 (Olivetti M24)" in XTIDECFG.
• Made some minor improvements to the library code that handles 'Drive Not Ready' errors in XTIDECFG.
• Optimizations.

File:

• trunk/XTIDE_Universal_BIOS/Inc/IDE_8bit.inc (modified) (4 diffs)

trunk/XTIDE_Universal_BIOS/Inc/IDE_8bit.inc

@@ -31 +31 @@
 ;       ES:DI:  Ptr to destination buffer
 ;   Returns:
-;       ES:DI:  Incremented/decremented for next word
+;       DI:     Incremented/Decremented for next word
 ;   Corrupts registers:
 ;       AL, FLAGS
@@ -61 +61 @@
 ;       DS:SI:  Ptr to source buffer
 ;   Returns:
-;       SI:     Incremented/decremented for next word
+;       SI:     Incremented/Decremented for next word
 ;   Corrupts registers:
 ;       AX, FLAGS
@@ -92 +92 @@
 ;       DS:SI:  Ptr to source buffer
 ;   Returns:
-;       SI:     Incremented/decremented for next word
+;       SI:     Incremented/Decremented for next word
 ;   Corrupts registers:
 ;       AX, FLAGS
@@ -115 +115 @@
 
 
+;--------------------------------------------------------------------
+; Emulates INSW for modified XTIDE for use on Olivetti M24 and derivatives.
+;
+; XTIDE_MOD_OLIVETTI_INSW
+;   Parameters:
+;       DX:     XTIDE Data Low Register address
+;       ES:DI:  Ptr to destination buffer
+;   Returns:
+;       DI:     Incremented/Decremented for next word
+;   Corrupts registers:
+;       AL, FLAGS
+;--------------------------------------------------------------------
+%macro XTIDE_MOD_OLIVETTI_INSW 0
+%ifdef USE_186  ; INS instruction available
+    insb                        ; Load low byte from port DX to [ES:DI]
+    inc     dx                  ; IDE Data Reg to XTIDE Data High Reg
+    insb                        ; Load high byte from port DX to [ES:DI]
+    dec     dx                  ; Restore to IDE Data Register
+%else   ; If 8088/8086
+    in      al, dx              ; Load low byte from port
+    inc     dx                  ; IDE Data Reg to XTIDE Data High Reg
+    stosb                       ; Store byte to [ES:DI]
+    in      al, dx              ; Load high byte from port
+    dec     dx                  ; Restore to IDE Data Register
+    stosb                       ; Store byte to [ES:DI]
+%endif
+%endmacro
+
+
 %endif ; IDE_8BIT_INC