; Mockingboad programming: ; + Has two 6522 I/O chips connected to two AY-3-8910 chips ; + Optionally has some speech chips controlled via the outport on the AY ; + Often in slot 4 ; TODO: how to auto-detect? ; References used: ; http://macgui.com/usenet/?group=2&id=8366 ; 6522 Data Sheet ; AY-3-8910 Data Sheet ;======================== ; Mockingboard card ; Essentially two 6522s hooked to the Apple II bus ; Connected to AY-3-8910 chips ; PA0-PA7 on 6522 connected to DA0-DA7 on AY ; PB0 on 6522 connected to BC1 ; PB1 on 6522 connected to BDIR ; PB2 on 6522 connected to RESET ; left speaker MOCK_6522_ORB1 = $C400 ; 6522 #1 port b data MOCK_6522_ORA1 = $C401 ; 6522 #1 port a data MOCK_6522_DDRB1 = $C402 ; 6522 #1 data direction port B MOCK_6522_DDRA1 = $C403 ; 6522 #1 data direction port A MOCK_6522_T1CL = $C404 ; 6522 #1 t1 low order latches MOCK_6522_T1CH = $C405 ; 6522 #1 t1 high order counter MOCK_6522_T1LL = $C406 ; 6522 #1 t1 low order latches MOCK_6522_T1LH = $C407 ; 6522 #1 t1 high order latches MOCK_6522_T2CL = $C408 ; 6522 #1 t2 low order latches MOCK_6522_T2CH = $C409 ; 6522 #1 t2 high order counters MOCK_6522_SR = $C40A ; 6522 #1 shift register MOCK_6522_ACR = $C40B ; 6522 #1 auxilliary control register MOCK_6522_PCR = $C40C ; 6522 #1 peripheral control register MOCK_6522_IFR = $C40D ; 6522 #1 interrupt flag register MOCK_6522_IER = $C40E ; 6522 #1 interrupt enable register MOCK_6522_ORANH = $C40F ; 6522 #1 port a data no handshake ; right speaker MOCK_6522_ORB2 = $C480 ; 6522 #2 port b data MOCK_6522_ORA2 = $C481 ; 6522 #2 port a data MOCK_6522_DDRB2 = $C482 ; 6522 #2 data direction port B MOCK_6522_DDRA2 = $C483 ; 6522 #2 data direction port A ; AY-3-8910 commands on port B ; RESET BDIR BC1 MOCK_AY_RESET = $0 ; 0 0 0 MOCK_AY_INACTIVE = $4 ; 1 0 0 MOCK_AY_READ = $5 ; 1 0 1 MOCK_AY_WRITE = $6 ; 1 1 0 MOCK_AY_LATCH_ADDR = $7 ; 1 1 1