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(docs) arch spec - Replace JLT with HLT because JLT can't work

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n loewen 2023-12-19 09:28:15 -08:00
parent 16eb93c947
commit ae87a11ebb
1 changed files with 3 additions and 7 deletions
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10
docs/architecture-specification.md
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@ -40,8 +40,8 @@ These are all addressed by number:*
| | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | | 8 | 9 | A | B | C | D | E | F |
|-------|---------|---------|---------|---------|---------|---------|---------|---------|-|-----------|-----------|-----------|-----------|-----------|-----------|----------|-----------|
| **0** | NOP | HLT | | | | | | | | | | | | | | | |
| **5** | LDA # | STA # | ADD # | SUB # | JMP # | HPE # | HPF # | TGF # | | _MUL #_ | _DIV #_ | _JLT #_ | _JGT #_ | _NOT #_ | _AND #_ | _OR #_ | _XOR #_ |
| **6** | LDA ind | STA ind | ADD ind | SUB ind | JMP ind | HPE ind | HPF ind | TGF ind | | _MUL ind_ | _DIV ind_ | _JLT ind_ | _JGT ind_ | _NOT ind_ | _AND ind_ | _OR ind_ | _XOR ind_ |
| **5** | LDA # | STA # | ADD # | SUB # | JMP # | HPE # | HPF # | TGF # | | _MUL #_ | _DIV #_ | _HLT #_ | _HGT #_ | _NOT #_ | _AND #_ | _OR #_ | _XOR #_ |
| **6** | LDA ind | STA ind | ADD ind | SUB ind | JMP ind | HPE ind | HPF ind | TGF ind | | _MUL ind_ | _DIV ind_ | _HLT ind_ | _HGT ind_ | _NOT ind_ | _AND ind_ | _OR ind_ | _XOR ind_ |
| **9** | DEV # | INP # | OUT # | NXT | | | | | | | | | | | | | |
| **A** | DEV ind | INP ind | OUT ind | NXT | | | | | | | | | | | | | |
| **F** | _RSL A_ | _RSR A_ | _ASL A_ | _ASR A_ | | | | | | | | | | | | | |
@ -61,14 +61,10 @@ High byte reference:
| 2, 2 | 1010 | A |
| 3, 3 | 1111 | F |
TODO: assess JMPs vs. HOPs
<mark>&rarr; FIXME: JLT, JGT can't work — those would require 2 arguments</mark>
Brief legend for mnemonics:
- RSL/RSR: Ring Shift Left/Right
- JLT/JGT: Jump Less/Greater Than
- HLT/HGT: Jump Less/Greater Than
- DEV: select IO device
- NXT: "next" - move to next line / card