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OS/2 1.0 debugging begins

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Jeff Parsons 2014-11-18 18:35:00 -08:00 • committed by jeffpar
commit 6660b9479f
8 changed files with 365 additions and 177 deletions
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31
modules/pcjs/lib/x86.js
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@ -58,11 +58,11 @@ var X86 = {
DF: 0x0400, // bit 10: Direction flag
OF: 0x0800, // bit 11: Overflow flag
IOPL: {
MASK: 0x3000, // 12-13: I/O Privilege Level (always set on 8086/80186, clear on 80286)
MASK: 0x3000, // bits 12-13: I/O Privilege Level (always set on 8086/80186, clear on 80286 reset)
SHIFT: 12
},
NT: 0x4000, // bit 14: Nested Task flag, always set on 8086/80186, clear on 80286
BIT15: 0x8000 // bit 15: reserved, always set on 8086/80186, clear otherwise
NT: 0x4000, // bit 14: Nested Task flag (always set on 8086/80186, clear on 80286 reset)
BIT15: 0x8000 // bit 15: reserved (always set on 8086/80186, clear otherwise)
},
/*
* Machine Status Word definitions (stored in regMSW)
@ -109,7 +109,6 @@ var X86 = {
*/
TSS: 0x0100,
LDT: 0x0200,
TSS_LDT: 0x0300,
TSS_BUSY: 0x0300,
GATE_CALL: 0x0400,
GATE_TASK: 0x0500,
@ -139,6 +138,30 @@ var X86 = {
BASE2431: 0xff00
}
},
TSS: {
PREV_TSS: 0x00,
CPL0_SP: 0x02, // start of values altered by task switches
CPL0_SS: 0x04,
CPL1_SP: 0x06,
CPL1_SS: 0x08,
CPL2_SP: 0x0a,
CPL2_SS: 0x0c,
CURR_IP: 0x0e,
CURR_PS: 0x10,
CURR_AX: 0x12,
CURR_CX: 0x14,
CURR_DX: 0x16,
CURR_BX: 0x18,
CURR_SP: 0x1a,
CURR_BP: 0x1c,
CURR_SI: 0x1e,
CURR_DI: 0x20,
CURR_ES: 0x22,
CURR_CS: 0x24,
CURR_SS: 0x26,
CURR_DS: 0x28, // end of values altered by task switches
CURR_LDT: 0x2a
},
/*
* Processor Exception Interrupts
*