>Anyway, Bjorn you are missing a lot of amd setup code, jmp to setup
>will follow by bunch of int 15h etc. You'll need to setup MMS windows
>at least on on CS0.
Actually, I do this instead:
mov byte cs:[0x312], #0x40
mov byte cs:[0x313], #0x90
mov byte cs:[0x314], #0x90
This turns the instructions
mov ah,#0x88
int 0x15
into
mov ah, #0x40 ;al is already 00
nop
nop
:-) I also needed some more CSC setup to make the keyboard interface work:
.org 0xf100
SC400RegInit:
dw 0xAB00 ;Configure 2 banks of DRAM:32 bit, EDO, 2mb depth
dw 0xAB01
dw 0x5C04 ;Set DRAM timing as slow as possible
dw 0x4005 ;Enable refresh, use 32khz osc for refresh
db 0x21, %0001000 ;disable 3ff0000 boot vector
dw 0x0724 ;waitstates?
db 0x32, %00000000 ;bit22-15 MMSA,
db 0x33, %00001000 ; MMSA enabled, ROMCS0, !WP, !Cache
;Required for superio interface. SuperIO needed to control LEDs.
dw 0x1938 ;Select ISA iochrdy, IOCS16, and AEN signals Vs. GPIOs
dw 0x0480 ;cpu clk:high spd mode=33mhz, low spd mode = 8 mhz
;required for remote debug via serial port
dw 0x01D1 ;Enable internal UART at 3f8
;Only required for UART remote debug if interrupt driven mode enabled
dw 0x40D8 ;Internal UART uses IRQ4
dw 0x7F38
dw 0x7539
dw 0x023a
dw 0x08C1
dw 0xaec2
SC400RegTableLen = (* - SC400RegInit) / 2
and then it works. (I posted a message to that effect shortly after posting my
original message, maybe it got lost.)
//Cheers, Björn.
