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don't allow add until page 1 is written to disk

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This commit is contained in:
Peter Ferrie 2016-11-25 16:22:03 -08:00
parent de691da719
commit b22f6a5dc8
1 changed files with 7 additions and 2 deletions
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9
src/4live.a
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@ -73,7 +73,7 @@
WIDTH = 40
HEIGHT = 24
LDRBASE = $2E0
INSTALLBUFFER = $23C ; yes, the overlay overwrites the loader...
INSTALLBUFFER = $239 ; yes, the overlay overwrites the loader...
; see also "warning!" below
SWAPBUFFER = $900 ; (LoadSaveEnd - LoadSaveStart) size
; needed by DiversiDOS, must be page-aligned
@ -354,6 +354,7 @@ InstallStart
;set to true if no data file found (carry is set)
rol ClearOnFirstKeypress + 1
rol EnableAddPage + 1
jsr SetTextCoords1
@ -455,7 +456,7 @@ GetKey
bne GetKey ;always
InstallEnd
!if (InstallEnd > JmpInstall) {
!error "page 2 swap-code too large, ", InstallEnd - JmpInstall, " bytes too many"
!error "INSTALLBUFFER too large, change to ", InstallStart + JmpInstall - InstallEnd
} else {
!if (InstallEnd < JmpInstall) {
!error "INSTALLBUFFER too low, change to ", InstallStart + JmpInstall - InstallEnd
@ -771,6 +772,7 @@ ClearOnFirstKeypress
plp ;restore carry
+ bcc DispatchCommand
sta WriteIfDirty2 + 1
sta EnableAddPage + 1
DispatchCommand
jsr $34f3 ;self-modified, currently both bytes
@ -910,6 +912,9 @@ PageReturn
;then select that page
HandleKeyAddPage
EnableAddPage
lda #0 ;self-modified
beq PageReturn ;no add until page 1 is written to disk
lda Pages + 1
cmp #(99 - 1) ;maximum 99 pages
beq PageReturn