fe8385da08
* Revert "Uploaded_2_9_2025" This reverts commit ec79bbdbc9052617461a3c1b4952290a05a51adb. * Fixing DEBUG_IO builds. * Make the IO port base a define. * Fix CPU test to properly handle 808x vs V20. * Improve timeout management logic. * Improve SD Card initialization logic. * Implement INT18h bootstrapping. * Implementing a different test for processor type. * Allow use with another fixed drive (eg: ESDI drive). * Allow swapping driver ID between the BIOS disk and XTMax. * Fix address of the ROM segment. * Fixing missing STI at the top of the handler. * Major rework of IO to use MOVSW. * More code reorg and auto-detecting second drive. * Update XTSD to use MOVSW. * Add diagnostics program. * Workaround for MS-DOS strange handling of interrupts. * Use a lookup table for the memory map. * Make the BootROM relocatable. * Some more refactor of the Teensy code.
178 lines
2.8 KiB
PHP
178 lines
2.8 KiB
PHP
;
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; This is test code invoked when building with AS_COM
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;
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;%define REAL_INT13
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%define DUMP_REGS
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xor ax, ax
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lahf
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sti
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mov ax, 0x1122
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mov bx, 0x3344
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mov cx, 0x5566
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mov dx, 0x7788
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mov si, 0x99aa
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mov di, 0xbbcc
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mov bp, 0xddee
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mov dl, 0x80
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mov ah, 0x08
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;mov bx, buf_write
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;mov ch, 0
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;mov cl, 1
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;mov dh, 0
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;mov al, 1
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call do_int13h
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mov dl, 0x80
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mov ah, 0x02
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mov bx, ds
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mov es, bx
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mov bx, buf_read
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mov ch, 0
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mov cl, 1
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mov dh, 0
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mov al, 1
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call do_int13h
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%if 1
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mov cx, 256
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mov si, buf_read
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.dump:
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lodsw
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call print_hex
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mov ax, space
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call print_string
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loop .dump
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mov ax, newline
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call print_string
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; wait for kbd
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mov ah, 0x01
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int 0x21
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%endif
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mov ah, 0x01
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call do_int13h
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mov ah, 0x01
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call do_int13h
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;mov ax, newline
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;call print_string
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;mov ch, 255
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;mov cl, 255
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;mov dh, NUM_HEADS-1
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;call compute_lba
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;push ax
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;mov ax, bx
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;call print_hex
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;pop ax
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;call print_hex
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;mov ax, newline
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;call print_string
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jmp end
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do_int13h:
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%ifdef DUMP_REGS
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call dump_regs
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%endif
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pushf ; save flags (to compare)
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%ifndef REAL_INT13
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; simulate vector call
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pushf
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push cs
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call int13h_entry
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%else
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int 0x13
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%endif
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pushf ; save flags (to compare)
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push ax
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jnc .success
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.error:
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mov ax, test_failed_msg
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call print_string
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jmp .finish
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.success:
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mov ax, test_success_msg
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call print_string
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.finish:
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pop ax
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push ax
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mov al, ah
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xor ah, ah
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call print_hex
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mov ax, newline
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call print_string
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pop ax
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; dump registers
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%ifdef DUMP_REGS
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popf
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pushf
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call dump_regs
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pop ax
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call print_hex
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mov ax, colon
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call print_string
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pop ax
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call print_hex
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mov ax, newline
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call print_string
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%else
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popf
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popf
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%endif
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; wait for kbd
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mov ah, 0x01
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int 0x21
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ret
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;
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; A fake INT13h handler to test redirection of floppy service
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;
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fake_int13h_entry:
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push ax
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mov ax, fake_handler_msg
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call print_string
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pop ax
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push ax
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mov al, ah
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xor ah, ah
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call print_hex
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mov ax, drive_msg
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call print_string
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mov ax, dx
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xor ah, ah
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call print_hex
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mov ax, newline
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call print_string
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pop ax
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mov ah, 0xaa
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push bp
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mov bp, sp
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or byte [bp+6], 0x1 ; set carry of flags for iret
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pop bp
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iret
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buf_write db 1, 2, 3, 4, 5, 6, 7, 8
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times 496 db 0
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db 248, 249, 250, 251, 252, 253, 254, 255
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times 512 db 0
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buf_read times 1024 db 0
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fake_handler_msg db 'BIOS INT13h Function ', 0
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drive_msg db ' Drive ', 0
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test_success_msg db 'Call succeeded ', 0
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test_failed_msg db 'Call failed ', 0
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end:
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