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Migrate SHRVDU16/CLG into main memory

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Bobbi Webber-Manners 2023-01-05 21:21:12 -05:00
parent 9ee3788c44
commit ec913ef6cb
3 changed files with 24 additions and 20 deletions
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BIN
applecorn.po
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22
auxmem.shr.s
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@ -143,7 +143,6 @@ SHRBGMASK EQU $B002 ; Colour mask background (word)
******************************************************************************
SHRBGMASKA DW $0000 ; Keep a copy in aux mem too
SHRGFXBGMASKA DW $0000
* Write character to SHR screen
@ -559,23 +558,8 @@ SHRCLREOL JSR SHRCHARADDR
* VDU16 (CLG) clears the whole SHR screen right now
SHRCLEAR PHP ; Disable interrupts
SEI
CLC ; 816 native mode
XCE
REP #$10 ; 16 bit index
MX %10 ; Tell Merlin
LDX #$0000
LDA SHRGFXBGMASKA
:L1 STAL $E12000,X ; SHR screen @ E1:2000
INX
CPX #$7D00
BNE :L1
SEP #$10 ; Back to 8 bit index
MX %11 ; Tell Merlin
SEC ; Back to 6502 emu mode
XCE
PLP ; Normal service resumed
SHRCLEAR >>> XF2MAIN,SHRVDU16
SHRCLRRET >>> ENTAUX
RTS
@ -642,7 +626,6 @@ SHRSETGCOL PHA
AND #$0F
TAY
LDA SHRCMASK320,Y ; Lookup mask in table
STA SHRGFXBGMASKA
>>> WRTMAIN
STA SHRGFXBGMASK
>>> WRTAUX
@ -662,7 +645,6 @@ SHRSETGCOL PHA
AND #$03
TAY
LDA SHRCMASK640,Y ; Lookup mask in table
STA SHRGFXBGMASKA
>>> WRTMAIN
STA SHRGFXBGMASK
>>> WRTAUX

22
mainmem.shr.s
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@ -787,6 +787,28 @@ SHRCOORD2 MX $00 ; Tell Merlin it's 16 bit
MX %11 ; Following code is 8 bit again
* Clear the graphics window
SHRVDU16 >>> ENTMAIN
PHP ; Disable interrupts
SEI
CLC ; 816 native mode
XCE
REP #$10 ; 16 bit index
MX %10 ; Tell Merlin
LDX #$0000
LDA SHRGFXBGMASK
:L1 STAL $E12000,X ; SHR screen @ E1:2000
INX
CPX #$7D00
BNE :L1
SEP #$10 ; Back to 8 bit index
MX %11 ; Tell Merlin
SEC ; Back to 6502 emu mode
XCE
PLP ; Normal service resumed
>>> XF2AUX,SHRCLRRET
* Validate graphics window parms & store if okay
* First 8 bytes of SHRVDUQ: left, bottom, right, top
SHRVDU24 >>> ENTMAIN