diff --git a/README.md b/README.md index b5e45d8..c1ba2c9 100644 --- a/README.md +++ b/README.md @@ -16,7 +16,7 @@ Why 6502 and not, for example, x86? * 6502 assembler is very easy and has a large archive of existing functions * existing 6502 SWEET16 already has the “hard work” done -* interesting to see it run in newer versions of 6502 processors +* interesting to see it run in newer faster versions of 6502 processors * how do you think Bender does what he does? (or the Terminator!) In progress: @@ -34,7 +34,7 @@ The meat of the project: Auxiliary: * `emulator/*`: 6502 emulator (borrowed Mike Chambers’ Fake6502 CPU emulator v1.1 ©2011) -* `xa-pre-process/*`: utility `xapp` to convert 32-bit fixed decimal quantities so that `xa` can use them +* `xa-pre-process/*`: my utility `xapp` to convert 32-bit fixed decimal quantities so that `xa` can use them Right now, for testing purposes, the code builds everything into one file `system.obj` and runs the code in the last block loaded, in this case, the code corresponding to `page6.src`. Eventually will support decoupling of system and application files. Application files will be inherently relocatable. diff --git a/common/common.asm b/common/common.asm index 0517cf6..ff3e1c6 100644 --- a/common/common.asm +++ b/common/common.asm @@ -43,7 +43,7 @@ _3 TAX ; save operand for later ASL ; shift to get offset to register ASL TAX ; back to index - RTS ; "return" to routine + RTS ; "return" to routine _4 TXA ; get operand ASL ; shift to get offset to 0X instructions TAY @@ -52,7 +52,7 @@ _4 TXA ; get operand LDA FN_0X,Y ; push low address PHA TXA ; restore operand - RTS ; "return" to routine + RTS ; "return" to routine _5 TXA ; get operand AND #$F ; mask to get index ASL ; shift to get offset to FX instructions @@ -408,7 +408,7 @@ _ABSX .( ; sets register at X to absolute value RTS .) -_BKRRD .( ; implement banker's rounding on quadword pointed by X +_BKRRD .( ; implement banker's rounding on quad-word pointed by X ; The logic table below shows the expected results. The only differences are ; when the least significant byte (LSB) is 128 and the second byte (2B) is even @@ -736,7 +736,7 @@ _6 JMP _RETI0X ; pull X, transfer I0 to r register, let it handle the return _MOD .( RTS .) - + _ESC .( ; ESC 00 - escape back into regular assembler PLA ; discard the COMMON _1 return address PLA