Retro/pcjs
Watch
1
0
Fork
You've already forked pcjs
 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Added initial logic for decoding PDP-10 input-output instructions

Browse source
This commit is contained in:
Jeff 2017-03-04 16:47:56 -08:00 • committed by Jeff Parsons
commit 1ac769431f
7 changed files with 431 additions and 287 deletions
Download patch file Download diff file Expand all files Collapse all files

58
modules/pdp10/lib/defines.js
View file

@ -139,10 +139,10 @@ var PDP10 = {
*
* Mode Suffix Source Destination
* ---- ------ ----- -----------
* 0: BASIC None E AC
* 1: IMMEDIATE I 0,E AC
* 2: MEMORY M AC E
* 3: SELF S E E (and AC if A is non-zero)
* 0: Basic None E AC
* 1: Immediate I 0,E AC
* 2: Memory M AC E
* 3: Self/Both S or B E E (and AC if A is non-zero)
*
* Input-output instructions look like:
*
@ -191,6 +191,56 @@ var PDP10 = {
DEBUGGER: 0x0004, // set if the Debugger wants to perform checks
WAIT: 0x0008, // WAIT operation in progress
PRESERVE: 0x000F, // OPFLAG bits to preserve prior to the next instruction
},
/*
* Readable CPU (or APR for "Arithmetic Processor") flags provided by the "CONI APR," instruction; see opCONI().
*/
RFLAG: {
PIA: 0o000007, // Priority Interrupt Assignment
OVFL: 0o000010, // Overflow
OVFL_IE: 0o000020, // Overflow Interrupt Enabled
TRAP_OFF: 0o000040, // Trap Offset
FPOVFL: 0o000100, // Floating-Point Overflow
FPOVFL_IE: 0o000200, // Floating-Point Overflow Interrupt Enabled
CLOCK: 0o001000, // Clock Flag
CLOCK_IE: 0o002000, // Clock Interrupt Enabled
NXM: 0o010000, // Non-Existent Memory
PRM: 0o020000, // Memory Protection
ADB: 0o040000, // Address Break
UIO: 0o100000, // User In-Out
PDOVFL: 0o200000 // Pushdown Overflow (TODO: Verify this is correct; the May 1968 doc may have a typo)
},
/*
* Writable CPU (or APR for "Arithmetic Processor") flags provided by the "CONO APR," instruction; see opCONO().
*
* A set bit performs the function shown below, a clear bit does nothing.
*/
WFLAG: {
PIA: 0o000007, // Priority Interrupt Assignment
OVFL_CL: 0o000010, // Clear Overflow
OVFL_IE: 0o000020, // Enable Overflow Interrupt
OVFL_ID: 0o000040, // Disable Overflow Interrupt
FPOVFL_CL: 0o000100, // Clear Floating-Point Overflow
FPOVFL_IE: 0o000200, // Enable Floating-Point Overflow Interrupt
FPOVFL_ID: 0o000400, // Disable Floating-Point Overflow Interrupt
CLOCK_CL: 0o001000, // Clear Clock Flag
CLOCK_IE: 0o002000, // Enable Clock Interrupt
CLOCK_ID: 0o004000, // Disable Clock Interrupt
NXM_CL: 0o010000, // Clear Non-Existent Memory
PRM_CL: 0o020000, // Clear Memory Protection
ADB_CL: 0o040000, // Clear Address Break
UIO_CL: 0o200000, // Clear All In-Out Devices
PDOVFL_CL: 0o400000 // Clear Pushdown Overflow
},
/*
* 7-bit device codes used by Input-Output instructions; see opIO().
*/
DEVICES: {
APR: 0o000, // Arithmetic Processor
PI: 0o001 // Priority Interrupt
}
};