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tx0dasm.cpp: Add notes on OPRs for reference

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AJR 2021-08-26 10:41:06 -04:00
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src/devices/cpu/tx0/tx0dasm.cpp
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MIT TX-0 disassembler
Mnemonics and relative timing of operate class micro-instructions
until mid-1960 (as given in M-5001-27):
0.8 | 700000 (CLL) Clear left 9 bits of AC
0.8 | 640000 (CLR) Clear right 9 bits of AC
----+--------------------------------------------------------
IOS | 610000 (EX0) Operate external equipment 0
IOS | 611000 (EX1) Operate external equipment 1
IOS | 612000 (EX2) Operate external equipment 2
IOS | 613000 (EX3) Operate external equipment 3
IOS | 614000 (EX4) Operate external equipment 4
IOS | 615000 (EX5) Operate external equipment 5
IOS | 616000 (EX6) Operate external equipment 6
IOS | 617000 (EX7) Operate external equipment 7
IOS | 621000 (R1L) Read one line of tape from PETR into AC
IOS | 622000 (DIS) Display point on scope (coordinates in AC)
IOS | 623000 (R3L) Read three lines of tape from PETR into AC
IOS | 624000 (PRT) Print character on Flexowriter
IOS | 626000 (P6H) Punch six holes (as specified by AC)
IOS | 627000 (P7H) Punch seven holes (as specified by AC)
----+--------------------------------------------------------
1.1 | Clear MBR
1.1 | 600100 (PEN) Set AC bits 0 and 1 from LP0 and LP1
1.1 | 600004 (TAC) Transfer (inclusive or) TAC to AC
1.2 | 600001 (AMB) Transfer AC to MBR (executed before COM)
1.2 | 600040 (COM) Complement AC
1.2 | 600003 (TBR) Transfer (inclusive or) TBR to MBR
1.3 | 600200 (MLR) Transfer MBR to LR
1.3 | 600002 (LMB) Transfer LR to MBR
1.3 | 600104 (ORL) Inclusive or MBR into LR
1.3 | 600304 (ANL) And MBR into LR
1.4 | 600020 (PAD) Partial add (exclusive or) MBR to AC
1.4 | 600400 (SHR) Shift AC right once
1.4 | 600600 (CYR) Cycle AC right once
1.7 | 600010 (CRY) Add carry digits to AC (according to LR)
1.8 | 603000 (HLT) Halt computer
ANL and ORL were added in the first half of 1959 (M-5001-6).
Mnemonics and relative timing of operate class micro-instructions
after 1960 (as given in M-5001-27-3 and M-5001-27-4):
0.6 | 631000 (CLL) Clear left 9 bits of AC
0.6 | 632000 (CLR) Clear right 9 bits of AC
0.7 | 640000 (AMB) Transfer AC to MBR
0.8 | 700000 (CLA) Clear AC
----+------------------------------------------------------------
** | 604000 (SEL) Select magnetic tape device
| 6x4x00 Backspace tape
| 6x4x04 Read select tape
| 6x4x10 Rewind tape
| 6x4x14 Write select tape
** | 620000 (CPY) Synchronize with copy (transfer to or from LR)
----+------------------------------------------------------------
1.1 | 601000 (TAC) Transfer (inclusive or) TAC to AC
1.1 | 603000 (PEN) Set AC bits 0 and 1 from LP0 and LP1
1.2 | 600100 (XMB) Transfer XR to MBR (with sign extension)
1.2 | 600040 (COM) Complement AC
1.2 | 602000 (TBR) Transfer (inclusive or) TBR to MBR
1.2 | 606000 (RPF) Read (inclusive or) PFR into MBR
1.3 | 600005 (ORB) Inclusive or LR into MBR
1.3 | 600007 (ANB) And LR into MBR
1.4 | 600200 (MBL) Transfer MBR to LR
1.4 | 600002 (LMB) Transfer LR to MBR
1.5 | 600020 (PAD) Partial add (exclusive or) MBR to AC
1.6 | 600400 (SHR) Shift AC right once
1.6 | 600600 (CYR) Cycle AC right once
1.6 | 607000 (SPF) Set PFR from MBR
1.7 | 600010 (CRY) Add carry digits to AC (according to LR)
1.8 | 600001 (MBX) Transfer MBR to XR
1.8 | 603000 (HLT) Halt computer
Previously supported Input-Output Stop group codes were unchanged.
***************************************************************************/
#include "emu.h"