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Added Compaq DeskPro 386 ROMs

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Jeff Parsons 2015-02-22 15:42:54 -08:00 • committed by jeffpar
commit eb196c3048
27 changed files with 5541 additions and 2285 deletions
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22
modules/pcjs/lib/x86.js
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@ -79,15 +79,19 @@ var X86 = {
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)
*/
MSW: {
PE: 0x0001, // protected-mode enabled
MP: 0x0002, // monitor processor extension (ie, coprocessor)
EM: 0x0004, // emulate processor extension
TS: 0x0008, // task switch indicator
SET: 0xfff0 // on the 80286, these are always set (TODO: Verify)
CR0: {
/*
* Machine Status Word (MSW) bit definitions
*/
MSW: {
PE: 0x0001, // protected-mode enabled
MP: 0x0002, // monitor processor extension (ie, coprocessor)
EM: 0x0004, // emulate processor extension
TS: 0x0008, // task switch indicator
ON: 0xfff0 // on the 80286, these bits are always on (TODO: Verify)
},
ET: 0x00000010, // coprocessor type (80287 or 80387); always 1 on post-80386 CPUs
PG: 0x80000000|0 // 0: paging disabled
},
SEL: {
RPL: 0x0003, // requested privilege level (0-3)