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A2osX/BIN/ACC.S.txt
Rémy GIBERT 31caf33a15 Kernel 0.94++
2021-05-24 15:27:23 +02:00

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NEW
AUTO 3,1
.LIST OFF
.OP 65C02
.OR $2000
.TF bin/acc
*/-------------------------------------
* # ACC
* Set behavior of accelerator module.
* Works with ZipChip, RocketChip,
* and TransWarp.
*
* ## Arguments
* **-F**
* Sets accelerator to run in FAST mode.
*
* **-S**
* Sets accelerator to run at normal
* Apple II speed (SLOW mode).
*
* ## Return Value
* Code does not detect if any accelerator
* exists, thus return value is limited to
* whether or not a valid argument was
* given.
*\-------------------------------------
.INB inc/macros.i
.INB inc/a2osx.i
*--------------------------------------
* Zero Page Segment, up to 32 bytes
*--------------------------------------
.DUMMY
.OR ZPBIN
ZS.START
ZPPtr1 .BS 2 ; address pointer (used in arg parsing)
ArgIndex .BS 1 ; index offset for argument parsing
bFast .BS 1 ; arg variable - fast mode if = 1
bSlow .BS 1 ; arg variable - slow mode if = 1
ZS.END .ED
*--------------------------------------
* File Header (16 Bytes)
*--------------------------------------
CS.START cld
jmp (.1,x)
.DA #$61 ; 6502,Level 1 (65c02)
.DA #1 ; BIN Layout Version 1
.DA #0 ; Events disabled (enable with S.PS.F.EVENT)
.DA #0
.DA CS.END-CS.START ; Code Size (without Constants)
.DA DS.END-DS.START ; Data SegmentSize
.DA #32 ; Stack Size
.DA #ZS.END-ZS.START ; Zero Page Size
.DA 0
*--------------------------------------
* Relocation Table
*--------------------------------------
.1 .DA CS.INIT
.DA CS.RUN
.DA CS.DOEVENT
.DA CS.QUIT
L.MSG.USAGE .DA MSG.USAGE ; msg for usage / help text
L.MSG.FAST .DA MSG.MSG.FAST ; msg for saying fast mode is enabled
L.MSG.SLOW .DA MSG.MSG.SLOW ; msg for saying slow mode is enabled
.DA 0
*--------------------------------------
* Called once at process creation
* Put code for loading LIB here
*--------------------------------------
CS.INIT clc ; nothing to init, so just clc and return
rts
*--------------------------------------
* Called until exit with CS
* if RUN exits with CC, RN entered again
*--------------------------------------
CS.RUN
.1 inc ArgIndex ; Check next argument
lda ArgIndex
>SYSCALL ArgV ; check for an arg at index in A
bcs .4 ; If doesn't exist, we're done with args
>STYA ZPPtr1 ; ArgV pointer was in Y,A so stick into ZPPtr1
lda (ZPPtr1)
cmp #'-' ; does arg have a hyphen?
bne .9 ; no, we're done as we don't use any non-hyphened args
jsr CS.RUN.CheckOpt ; if it had a hyphen, check and set arg if recognized
bcc .1 ; if we recognized the arg, then loop again to check next
*--- Fast Mode Test -------------------
.4
bit bFast ; did they want us to switch to fast mode?
bpl .5 ; no, so go check next possibility
>PUSHW L.MSG.FAST ; push address for fast mode message
>PUSHBI 0
>SYSCALL PrintF ; print fast mode msg
jsr CS.RUN.SetFastMode ; call fast mode routine
jmp .99 ; jump to successful exit
*--- Slow mode test -------------------
.5
bit bSlow ; did they want us to switch to slow mode?
bpl .9 ; no, so go display usage
>PUSHW L.MSG.SLOW ; push address for slow mode message
>PUSHBI 0
>SYSCALL PrintF ; print slow mode message
jsr CS.RUN.SetSlowMode ; call slow mode routine
jmp .99 ; jump to successful exit
*--- Display usage and error out ------
.9
>PUSHW L.MSG.USAGE ; push address for usage text
>PUSHBI 0
>SYSCALL PrintF ; print usage message
lda #E.SYN ; set OS return code as Syntax Error
sec ; indicate we don't want CS.RUN called again
rts ; return to OS
*--- Successful exit ------------------
.99
lda #0 ; set OS return code to success
sec ; indicate we don't want CS.RUN called again
rts ; return to OS
*--------------------------------------
* Called if option S.PS.F.EVENT enabled in Header
* Timer Event : every 10th seconds
*--------------------------------------
CS.DOEVENT sec ; we don't use this since we don't have timer events
rts
*--------------------------------------
* Called once, when RUN exited with CS
* Put code for unloading LIB here
*--------------------------------------
CS.QUIT clc ; nothing to do on exit except clear carry and return
rts
*--------------------------------------
* CheckOpt assumes a set ZPPtr1 which is the address of the command line argument being examined.
* We start at 1 to look past the '-' as position 0 since that was checked by the caller.
* OptionList is a list of possible options and each character correlates with a memory offset
* in OptionVars, which are only one byte since they are in ZP but this also allows for us to
* simply use indexed addressing to reference them easily as well instead of doing 16-bit
* address juggling.
* The options are checked in reverse from end-to-start and indexed by X.
*--------------------------------------
CS.RUN.CheckOpt ldy #1 ; set up y to look at second character of passed in arg
lda (ZPPtr1),y ; check second character of passed in argument into A
ldx #OptionVars-OptionList-1 ; clever way to put size of OptionList into X
.2 cmp OptionList,x ; compare the arg we got to the OptionList at X
beq .3 ; if it is a match, go handle it.
dex ; if not, decrement so we can check next OptionList
bpl .2 ; if we haven't reached end of OptionList, go check next
sec ; set carry if we didn't find a match
rts ; return to caller
.3 ldy OptionVars,x ; since we matched, find ZP addr of matching option into Y
lda #$ff ; we will set this ZP option to $FF
sta 0,y ; store A into the ZP address we have in Y
clc ; clear carry since we found a match
rts ; return to caller
*--------------------------------------
* CS.RUN.SetFastMode
* Calls a few different ways to enable accelerators, mainly ZipChip, Titan, and TransWarp.
* However, it also works for RocketChip as well.
* The first one (using $C05C) came from some documentation, but not sure which accelerator uses it.
*--------------------------------------
CS.RUN.SetFastMode
sta $C05C ; not sure which accelerator follows this? Not RC at least..
* lda #$05 ; enable Titan Accelerator //e fast mode
* sta $C086 ; by storing $05 to $C086
lda #$5A ; unlock ZipChip so we can configure it
sta $C05A ; by storing $5A into $C05A 4 times
sta $C05A ; to trigger the unlock latch
sta $C05A
sta $C05A
lda #0 ; enable ZipChip fast mode by storing #0
sta $C05B ; into $C05B
lda #$A5 ; lock ZipChip to prevent more configs
sta $C05A ; by setting $C05A to $A5
lda #0 ; enable TransWarp fast mode by storing #0
sta $C074 ; into $C074
rts
*--------------------------------------
* CS.RUN.SetSlowMode
* Calls a few different ways to disable accelerators, mainly ZipChip, Titan, and TransWarp.
* However, it also works for RocketChip as well.
* The first one (using $C05C) came from some documentation, but not sure which accelerator uses it.
*--------------------------------------
CS.RUN.SetSlowMode
sta $C05D ; not sure which accelerator follows this? Not RC at least..
* lda #$01 ; enable Titan Accelerator //e slow mode
* sta $C086 ; by storing $01 to $C086
lda #$5A ; unlock ZipChip so we can configure it
sta $C05A ; by storing $5A into $C05A 4 times
sta $C05A ; to trigger the unlock latch
sta $C05A
sta $C05A
lda #0 ; disable ZipChip acceleration by setting location
sta $C05A ; $C05A to #0
lda #$A5 ; lock ZipChip to prevent more configs
sta $C05A ; by setting $C05A to $A5
lda #1 ; disable TransWarp acceleration by storing #1
sta $C074 ; into $C074
rts
*--------------------------------------
CS.END
*--------------------------------------
MSG.USAGE .AS "Usage : ACC\r\n"
.AS " -F : Fast speed\r\n"
.AZ " -S : Slow speed\r\n"
MSG.MSG.FAST .AZ "FAST mode enabled\r\n"
MSG.MSG.SLOW .AZ "SLOW mode enabled\r\n"
*--------------------------------------
OptionList .AS "FfSs"
OptionVars .DA #bFast,#bFast,#bSlow,#bSlow
*--------------------------------------
* Per Process DATA segment (0 filled before INIT)
*--------------------------------------
.DUMMY
.OR 0
DS.START
DS.END .ED
*--------------------------------------
MAN
SAVE usr/src/bin/acc.s
ASM
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