keen: improve IIgs support
This commit is contained in:
Vince Weaver
parent
c960ca1b16
commit
1df61f7865
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@ -32,7 +32,7 @@ HELLO: hello.bas
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LOADER: loader.o
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ld65 -o LOADER loader.o -C ../../linker_scripts/apple2_1000.inc
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loader.o: loader.s
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loader.o: loader.s hardware_detect.s
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ca65 -o loader.o loader.s -l loader.lst
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####
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@ -12,6 +12,7 @@ TBCOLOR = $C022 ; IIgs text foreground / background colors
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NEWVIDEO = $C029 ; IIgs graphics modes
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SPEAKER = $C030
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CLOCKCTL = $C034 ; bits 0-3 are IIgs border color
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CYAREG = $C036 ; iigs motor detect and clock speed
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SET_GR = $C050
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SET_TEXT = $C051
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FULLGR = $C052
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@ -0,0 +1,153 @@
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;====================
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; Hardware Detect
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; we mostly care about the model type
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; TODO: for hi-res we might want to detect language card
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; Things we care about
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; + Original Apple II / II+ have horrible keyboard support
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; for platformers (only keydown events). If we detect IIe or
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; later we can do better
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; + Apple IIgs before ROM3 has broken lo-res PAGE2 support.
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; we can enable the software workaround but it's slow
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hardware_detect:
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;=======================
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; Hardware Detect Model
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;=======================
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; Yes Michaelangel007 I will eventually update linux_logo 6502
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jsr detect_appleii_model
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lda APPLEII_MODEL
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cmp #'g'
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bne not_iigs
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is_a_iigs:
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; enable 1MHz mode
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; see hw.accel.a in 4cade
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setspeed:
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lda CYAREG
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and #$7f
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sta CYAREG
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; gr/text page2 handling broken on early IIgs models (before ROM3)
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; this enables the workaround
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jsr ROM_TEXT2COPY ; set alternate display mode on IIgs
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; set background color to black instead of blue
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lda NEWVIDEO
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and #%00011111 ; bit 7 = 0 -> IIgs Apple II-compat video modes
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; bit 6 = 0 -> IIgs 128K memory map same as IIe
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; bit 5 = 0 -> IIgs DHGR is color, not mono
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; bits 0-4 unchanged
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sta NEWVIDEO
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lda #$F0
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sta TBCOLOR ; white text on black background
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lda #$00
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sta CLOCKCTL ; black border
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sta CLOCKCTL ; set twice for VidHD
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not_iigs:
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;===========================
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; Check Apple II model
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;===========================
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; this is mostly for IIc support
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; as it does interrupts differently
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; some of this info from the document:
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; Apple II Family Identification Routines 2.2
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;
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; ' ' = Apple II
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; '+' = Apple II+
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; 'e' = Apple IIe
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; 'c' = Apple IIc
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; 'g' = Apple IIgs
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; 'm' = mac L/C with board
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; 'j' = jplus
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; '3' = Apple III
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detect_appleii_model:
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lda #' '
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ldx $FBB3
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; II is $38
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; J-plus is $C9
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; II+ is $EA (so is III)
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; IIe and newer is $06
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cpx #$38 ; ii
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beq done_apple_detect
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; ii+ is EA FB1E=AD
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; iii is EA FB1E=8A 00
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cpx #$EA
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bne not_ii_iii
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ii_or_iii:
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lda #'+' ; ii+/iii
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ldx $FB1E
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cpx #$AD
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beq done_apple_detect ; ii+
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lda #'3'
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bne done_apple_detect ; bra iii
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not_ii_iii:
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lda #'j' ; jplus
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cpx #$C9
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beq done_apple_detect
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cpx #$06
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bne done_apple_detect
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apple_iie_or_newer:
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ldx $FBC0 ; $EA on a IIe
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; $E0 on a IIe enhanced
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; $00 on a IIc/IIc+
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; $FE1F = $60, IIgs
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beq apple_iic
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lda #'e'
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cpx #$EA
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beq done_apple_detect
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; cpx #$E0
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; beq done_apple_detect
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; should do something if not $E0
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; GS and IIe enhanced are the same, need to check
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sec ; set carry
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jsr $FE1F
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bcs done_apple_detect ;If carry then IIe enhanced
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; get here we're a IIgs?
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lda #'g'
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bne done_apple_detect
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apple_iic:
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lda #'c'
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done_apple_detect:
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sta APPLEII_MODEL
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rts
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@ -48,6 +48,37 @@ filbuf = $3D6 ; filbuf: .res 4 ; = bit2tbl+86
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loader_start:
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jsr hardware_detect
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lda #<model_string
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sta OUTL
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lda #>model_string
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sta OUTH
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lda APPLEII_MODEL
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sta model_string+17
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cmp #'g'
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bne go_print
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lda #'s'
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sta model_string+18
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go_print:
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ldy #0
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print_model:
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lda (OUTL),Y
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beq print_model_done
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ora #$80
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sta $7d0,Y
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iny
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jmp print_model
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print_model_done:
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lda #LOAD_TITLE
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sta WHICH_LOAD
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@ -267,10 +298,10 @@ quick_print:
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beq quick_print_done
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jsr COUT1
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iny
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jmp quick_print
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; jmp quick_print
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quick_print_done:
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; rts
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rts
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; jsr quick_print
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@ -285,6 +316,8 @@ fnf_keypress:
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error_string:
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.byte "PLEASE INSERT DISK 1, PRESS RETURN",0
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model_string:
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.byte "DETECTED APPLE II",0,0,0
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@ -679,6 +712,8 @@ step2: .byte $70, $2c, $26, $22, $1f, $1e, $1d, $1c
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sectbl: .byte $00,$0d,$0b,$09,$07,$05,$03,$01,$0e,$0c,$0a,$08,$06,$04,$02,$0f
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.include "hardware_detect.s"
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; From $BA96 of DOS33
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;nibtbl: .res 128 ; = *
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; .byte $00,$01,$98,$99,$02,$03,$9C,$04 ; $BA96 ; 00
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@ -140,7 +140,7 @@ MARS_X = $A0
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MARS_Y = $A1
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INITIAL_SOUND = $A2
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PLAY_END_SOUND = $A3
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APPLEII_MODEL = $A4
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WHICH_SLOT = $DA
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JS_BUTTON_STATE = $DB
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@ -0,0 +1,12 @@
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Apple II Keyboard Support
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Original Apple II / Apple II+
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Apple IIe
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If you read $C010 (KEYRESET) bit #7 is "any key down" meaning
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you can detect if a key is being held down
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Apple IIc / IIgs
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Possibly have actual keyboard buffer you can enable, along
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with interrupts?
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