Apple-2-SW/Applecorn
1
0
Fork 0
mirror of https://github.com/bobbimanners/Applecorn.git synced 2025-01-09 14:30:50 +00:00
Code Issues Projects Releases Wiki Activity

JGH improvements to auxmem.chario.s.

Browse Source
This commit is contained in:
Bobbi Webber-Manners 2021-08-14 17:42:19 -04:00
parent 4943986bae
commit 8b39405a4a
2 changed files with 24 additions and 104 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

BIN
applecorn.po
View File

Binary file not shown.

128
auxmem.chario.s
View File

@ -6,6 +6,10 @@
*****************
* Character read and write
*
* 14-Aug-2021 Flashing cursor and INKEY sync'd to frame
* rate with VBLK. Ensured cursor turned on
* straightaway.
* TEMP:
FXESCCHAR EQU $240
@ -53,32 +57,40 @@ RDCHHND LDA #$80 ; flag=wait forever
INKEY PHY ; Dummy PHY to balance RDCH
INKEYGO PHX ; Save registers
PHY
;
JSR GETCHRC ; Get character under cursor
STA OLDCHAR
BRA INKEYLP
CLI
BRA INKEY1 ; Turn cursor on
;
INKEYLP1 PHX
INKEYLP2 PHY
INKEYLP INC FLASHER ; Increment cursor counter
INC FLASHER
* INC FLASHER ; Fast flash
* INC FLASHER
LDA FLASHER
AND #63 ; Flash every 64/100sec = 32/50sec
AND #127 ; Flash every 64/100sec = 32/50sec
BNE INKEY3 ; Not time to toggle yet
LDA OLDCHAR ; Prepare to remove cursor
BIT FLASHER
BVS INKEY2 ; Remove cursor
LDA CURSOR ; Add cursor
* TO DO: Cursor could be any char, eg $A0 for block cursor
BMI INKEY2 ; Remove cursor
INKEY1 LDA CURSOR ; Add cursor
INKEY2 JSR PRCHRC ; Toggle cursor
INKEY3
;
LDA ESCFLAG
SEC
INKEY3 LDA ESCFLAG
BMI INKEYOK ; Escape pending, return it
JSR KEYREAD ; Test for input, all can be trashed
INKEY4 JSR KEYREAD ; Test for input, all can be trashed
BCC INKEYOK ; Char returned, return it
JSR DELAY ; Wait 1/100sec
* JSR DELAY ; Wait 1/100sec
;
* VBLK pulses at 50Hz, changes at 100Hz
* (60Hz in US, will need tweeking)
LDX $C019 ; Get initial VBLK state
INKEY5 BIT $C000
BMI INKEY4 ; Key pressed
TXA
EOR $C019
BPL INKEY5 ; Wait for VBLK change
;
PLY
BMI INKEYLP2 ; Loop forever
PLX
@ -111,98 +123,6 @@ INKEYOK PHA
; Escape: CS, A=?? , X=???, Y<$80
* OLD CODE
**********
*
*RDCHHND PHX
* PHY
* JSR GETCHRC
* STA OLDCHAR
*:L1 LDA CURS+1 ; Skip unless CURS=$8000
* CMP #$80
* BNE :S1
* LDA CURS
* BNE :S1
*
* STZ CURS
* STZ CURS+1
* LDA CSTATE
* ROR
* BCS :S2
* LDA #'_'
* BRA :S3
*:S2 LDA OLDCHAR
*:S3 JSR PRCHRC
* INC CSTATE
*:S1 INC CURS
* BNE :S4
* INC CURS+1
*:S4 LDA $C000 ; Keyboard data/strobe
* BPL :L1
* LDA OLDCHAR ; Erase cursor
* JSR PRCHRC
* LDA $C000
* AND #$7F
* STA $C010 ; Clear strobe
* PLY
* PLX
* CMP #$1B ; Escape pressed?
* BNE :S5
* SEC ; Return CS
* ROR ESCFLAG
* SEC
* RTS
*:S5 CLC
* RTS
*CURS DW $0000 ; Counter
*CSTATE DB $00 ; Cursor on or off
*OLDCHAR DB $00 ; Char under cursor
*
*
** Performs OSBYTE $81 INKEY$ function
** X,Y has time limit
** On exit, CC, Y=$00, X=key - key pressed
** CS, Y=$FF - timeout
** CS, Y=$1B - escape
*GETKEY TYA
* BMI NEGKEY ; Negative INKEY
*:L1 CPX #$00
* BEQ :S1
* LDA $C000 ; Keyb data/strobe
* AND #$80
* BNE :GOTKEY
* JSR DELAY ; 1/100 sec
* DEX
* BRA :L1
*:S1 CPY #$00
* BEQ :S2
* DEY
* LDX #$FF
* BRA :L1
*:S2 LDA $C000 ; Keyb data/strobe
* AND #$80
* BNE :GOTKEY
* LDY #$FF ; No key, time expired
* SEC
* RTS
*:GOTKEY LDA $C000 ; Fetch char
* AND #$7F
* STA $C010 ; Clear strobe
* CMP #27 ; Escape
* BEQ :ESC
* TAX
* LDY #$00
* CLC
* RTS
*:ESC ROR ESCFLAG
* LDY #27 ; Escape
* SEC
* RTS
*NEGKEY LDX #$00 ; Unimplemented
* LDY #$00
* RTS
BYTE81 TYA
BMI NEGINKEY ; XY<0, scan for keypress
JSR INKEY ; XY>=0, wait for keypress