Apple-2-SW/Applecorn
1
0
Fork 0
mirror of https://github.com/bobbimanners/Applecorn.git synced 2025-01-07 17:30:02 +00:00
Code Issues Projects Releases Wiki Activity

Migrate SHRVDU16/CLG into main memory

Browse Source
This commit is contained in:
Bobbi Webber-Manners 2023-01-05 21:21:12 -05:00
parent 9ee3788c44
commit ec913ef6cb
3 changed files with 24 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

BIN
applecorn.po
View File

Binary file not shown.

22
auxmem.shr.s
View File

@ -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
View File

@ -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