From d464c878bb8a8e68daa94f9e37afbd8aec15afd8 Mon Sep 17 00:00:00 2001
From: Tolik <85737314+Tolik-Trek@users.noreply.github.com>
Date: Wed, 28 May 2025 04:10:01 +1000
Subject: [PATCH] ...

---
 constants/SP2000.inc | 42 +++++++++++++++++++++++++++++++-----------
 1 file changed, 31 insertions(+), 11 deletions(-)

diff --git a/constants/SP2000.inc b/constants/SP2000.inc
index 65819c8..4305f49 100644
--- a/constants/SP2000.inc
+++ b/constants/SP2000.inc
@@ -1825,17 +1825,37 @@ CtrlByte:						; Bytes for IDE.Read.Status
 .StreamErrror		EQU     .Fault
 .ATAPI_DMAReady		EQU	.Fault
 .ATAPI_Service		EQU	.SeekComplete
-/*
-Bit	Abbreviation	Function
-0	ERR	Indicates an error occurred. Send a new command to clear it (or nuke it with a Software Reset).
-1	IDX	Index. Always set to zero.
-2	CORR	Corrected data. Always set to zero.
-3	DRQ	Set when the drive has PIO data to transfer, or is ready to accept PIO data.
-4	SRV	Overlapped Mode Service Request.
-5	DF	Drive Fault Error (does not set ERR).
-6	RDY	Bit is clear when drive is spun down, or after an error. Set otherwise.
-7	BSY	Indicates the drive is preparing to send/receive data (wait for it to clear). In case of 'hang' (it never clears), do a software reset.
-*/
+; Bit	Abbreviation	Function
+; 7	BSY	Indicates the drive is preparing to send/receive data (wait for it to clear). In case of 'hang' (it never clears), do a software reset.
+; 6	RDY	Bit is clear when drive is spun down, or after an error. Set otherwise.
+; 5	DF	Drive Fault Error (does not set ERR).
+; 4	SRV	Overlapped Mode Service Request.
+; 3	DRQ	Set when the drive has PIO data to transfer, or is ready to accept PIO data.
+; 2	CORR	Corrected data. Always set to zero.
+; 1	IDX	Index. Always set to zero.
+; 0	ERR	Indicates an error occurred. Send a new command to clear it (or nuke it with a Software Reset).
+
+; device/head register bits
+DeviceHeadByte:
+.LBA			EQU	#40
+.Slave			EQU	#10
+;
+DeviceHeadBit:
+.LBA			EQU	6	; LBA = 1
+.Slave			EQU	4	; Slave = 1
+
+DeviceControlBit:
+.Always_Set		EQU	3
+.Reset			EQU	2	;SRST
+.Int			EQU	1	;nIEN
+.AlwaysClear		EQU	0
+
+DeviceControlByte:
+.setReset		EQU	#0C	;SRST
+.setInt			EQU	#0A	;nIEN
+.resReset		EQU	#08
+.resInt			EQU	#08
+
 Chanel:
 .Set_0:			EQU     #20BC					; для использования с полной адресацией (рег BC), заслать '1'
 .Set_1:			EQU     #00BC					; для использования с полной адресацией (рег BC), заслать '1'