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Refine INT 33h list a bit in the source code

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Jonathan Campbell 2021-08-24 01:23:41 -07:00
parent a9e7dfa68e
commit 060b82313b
1 changed files with 30 additions and 1 deletions
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31
src/ints/mouse.cpp
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@ -1599,11 +1599,24 @@ static Bitu INT33_Handler(void) {
reg_bx = mouse.language;
break;
case 0x24: /* MS MOUSE v6.26+ - GET SOFTWARE VERSION, MOUSE TYPE, AND IRQ NUMBER */
// TODO: If PC-98 mode, return type 0x01 bus mouse, and bus mouse IRQ.
// If emulating a serial mouse, return type 0x02 and serial port IRQ.
reg_bx = 0x805; //Version 8.05 woohoo
reg_ch = 0x04; /* PS/2 type */
reg_cl = 0; /* PS/2 (unused) */
reg_cl = 0; /* PS/2 mouse == 0, for any other type, this would be the IRQ */
break;
case 0x25: /* MS MOUSE v6.26+ - GET GENERAL DRIVER INFORMATION */
// TODO: According to PC sourcebook reference
// Returns:
// AH = status
// bit 7 driver type: 1=sys 0=com
// bit 6: 0=non-integrated 1=integrated mouse driver
// bits 4-5: cursor type 00=software text cursor 01=hardware text cursor 1X=graphics cursor
// bits 0-3: Function 28 mouse interrupt rate
// AL = Number of MDDS (?)
// BX = fCursor lock
// CX = FinMouse code
// DX = fMouse busy
LOG(LOG_MOUSE, LOG_ERROR)("Get general driver information not implemented");
break;
case 0x26: /* MS MOUSE v6.26+ - GET MAXIMUM VIRTUAL COORDINATES */
@ -1617,12 +1630,28 @@ static Bitu INT33_Handler(void) {
Mouse_Read_Motion_Data();
break;
case 0x28: /* MS MOUSE v7.0+ - SET VIDEO MODE */
// TODO: According to PC sourcebook
// Entry:
// CX = Requested video mode
// DX = Font size, 0 for default
// Returns:
// DX = 0 on success, nonzero (requested video mode) if not
LOG(LOG_MOUSE, LOG_ERROR)("Set video mode not implemented");
break;
case 0x29: /* MS MOUSE v7.0+ - ENUMERATE VIDEO MODES */
// TODO: According to PC sourcebook
// Entry:
// CX = 0 for first, != 0 for next
// Exit:
// BX:DX = named string far ptr
// CX = video mode number
LOG(LOG_MOUSE, LOG_ERROR)("Enumerate video modes not implemented");
break;
case 0x2a: /* MS MOUSE v7.02+ - GET CURSOR HOT SPOT */
// NTS: Whoever compiled the INT 33 list in the Microsoft PC sourcebook made a big mistake
// here and started counting hexadecimal as decimal. This function is wrongly listed as INT 33h AH=30H.
// You can tell by the summary list which shows both hexadecimal and decimal side by side, this is
// listed as AH=30h (42). Decimal 42 as hexadecimal would be 0x2A (0x20 + 0x0A) == (32 + 10) == 42 == 0x2A.
reg_al = (uint8_t)-mouse.hidden; // Microsoft uses a negative byte counter for cursor visibility
reg_bx = (uint16_t)mouse.hotx;
reg_cx = (uint16_t)mouse.hoty;