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First cut at PDP-10 byte instructions

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Jeff 2017-03-02 23:10:24 -08:00 • committed by Jeff Parsons
commit 25aa95cec8
7 changed files with 396 additions and 276 deletions
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13
modules/pdp10/lib/defines.js
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@ -158,10 +158,14 @@ var PDP10 = {
OPTEST: 0o71100, // operation with test
OPIO: 0o70034, // input-output operation
OPUUO: 0o70000, // unimplemented user operation (UUO) mask
OPSHIFT: Math.pow(2, 21), // operation shift
IOSHIFT: Math.pow(2, 26), // input-output device code shift
IOMASK: 0o177, // input-output device code mask (after shift)
ACSHIFT: Math.pow(2, 23), // used to shift down the high 13 bits, with A starting at bit 0
OP_SCALE: Math.pow(2, 21), // operation scale
IO_SCALE: Math.pow(2, 26), // input-output device code scale
IO_MASK: 0o177, // input-output device code mask (after descale)
A_SCALE: Math.pow(2, 23), // used to shift down the high 13 bits, with A starting at bit 0
P_SCALE: Math.pow(2, 30), // P scale
P_MASK: 0o77, // P mask (after descale)
S_SHIFT: 24, // S shift
S_MASK: 0o77, // S mask (after shift)
A_SHIFT: 23, // A shift
A_MASK: 0o17, // A mask (after shift)
I_BIT: 0o20000000, // indirect bit
@ -169,6 +173,7 @@ var PDP10 = {
X_MASK: 0o17, // X mask (after shift)
Y_MASK: 0o777777, // Y mask
R_MASK: 0o37777777, // used to isolate the low 23 bits (I,X,Y)
PTR_MASK: 0o77777777, // used to isolate the low 24 bits (?,I,X,Y) of a byte pointer
HALT: 0o5304 // operation code for HALT
},