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This commit is contained in:
Peter Ferrie 2019-11-06 19:42:41 -08:00
parent a2422451b2
commit b0781fc7ea
1 changed files with 12 additions and 8 deletions
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20
src/hw.accel.a
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@ -229,17 +229,22 @@ build_addon
; Function #1: Apple IIc+
iicplus
nop
nop
nop
nop
end_iicplus
; Set //c+ speed. Uses the horrible firmware in case other
; code works "by the book", that is can check and set
; whether the accelerator is enabled.
; The //c+ is otherwise Zip compatible.
lda #1 ; disable accelerator entry point
!byte $2C ; BIT <ABSOLUTE>, hide next lda #
lda #0 ; enable accelerator entry point
!cpu 65C02 ; only used for //c+
inc ; 65C02 $1A
!cpu 6502
; This code cannot run from either LC or stack,
; so it's set off and left off. Sorry IIc+ users.
lda #$60
sta DisableAccelerator+3
lda #2 ; disable accelerator entry point
; !byte $2C ; BIT <ABSOLUTE>, hide next lda #
; lda #1 ; enable accelerator entry point
; cgga calls save X and Y regs but sets $0 to 0
; (this will get a laugh from C programmers)
@ -261,7 +266,6 @@ iicplus
plp ; restore interrupt state
stx $0
rts
end_iicplus
; Function #2: IIgs, Laser 128EX, or IIe card
;; setspeed - set 1Mhz with AND and fast with OR