romych/OK240.2-Firmware
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OK240.2-Firmware/Type/type.asm

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; ==================================================
; TYPE.COM
;
; Disassembled by Romych, 2026-03-01
; ==================================================
DEVICE NOSLOT64K
INCLUDE "equates.inc"
OUTPUT TYPE.COM
MODULE TYPE
ORG 0x0100
; ---------------------------------------------------
; Entry point
; ---------------------------------------------------
start:
LD HL, t_start
LD SP, HL
LD DE, 0x0
PUSH DE
JP (HL)
DB "roDOS TYPE FILE Utility(C) IRIMS, Moscow 1985"
t_start:
CALL t_check_version
; unsupported bdos call
LD C, 49
LD DE, t_scb_1
CALL jp_bdos_enter
DEC A
DEC A
LD (t_scb_mm), A
; At start command line params here
LD HL, p_cmd_line_len
LD (t_buff_addr), HL
LD A, (HL)
LD (cmd_par_len), A
; skip spaces before first parameter
.skip_sp_0:
CALL t_get_cmdl_char
JP C, t_handle_error
CP ASCII_SP
JP Z, .skip_sp_0
; get filename
.get_next_ch:
CALL t_get_cmdl_char
JP C, t_open_file
CP ASCII_SP
JP NZ, .get_next_ch
; get
.skip_sp_1:
CALL t_get_cmdl_char
JP C, t_open_file
CP ASCII_SP
JP Z, .skip_sp_1
CP 'P'
JP Z, t_param_P
CP 'D'
JP NZ, t_param_no_PD
LD A, 1
JP t_param_cmn
t_param_no_PD:
CP 'C'
JP NZ, t_param_no_D
LD A, 2
JP t_param_cmn
t_param_no_D:
CP 'F'
JP NZ, t_param_unknown
LD A, 3
t_param_cmn:
LD (cmd_switch), A
.skip_sp_2:
CALL t_get_cmdl_char
JP C, t_open_file
CP ASCII_SP
JP Z, .skip_sp_2
t_param_P:
CP 'P'
JP NZ, t_param_unknown
LD A, 0xff
LD (flag1), A
CALL get_numbr
JP C, t_open_file
LD A, L
OR A
JP Z, t_open_file
LD (t_scb_mm), A
t_open_file:
LD C, 15
LD DE, fcb1
CALL jp_bdos_enter
CP 0xff
JP Z, t_handle_error
LD HL, tpa
LD (t_buff_addr), HL
t_dump_part:
LD A, (t_scb_mm)
LD (cmd_par_len), A
print_next_byte:
; get next byte, return if error
CALL t_get_nxt_byte
RET C
; return if end of text marker
CP ASCII_SUB
RET Z
; print character
LD (t_cut_byte), A
LD E, A
CALL t_print
LD A, (t_cut_byte)
CP ASCII_LF
JP NZ, print_next_byte
; LF
LD A, (flag0)
OR A
JP Z, lo_ctr_0
; wait until keyboard key pressed
wait_for_key:
CALL t_get_key_wo_echo
OR A
JP Z, wait_for_key
; check for Ctrl+C - interrupt
CP CTRL_C
JP Z, t_is_ctrl_c
; Space - fro continue
CP ASCII_SP
JP Z, print_next_byte
CP CTRL_P
JP NZ, is_no_ctrl_p
; Access the System Control Block (Unsupported!)
; get value at offset
LD C, 49
LD DE, t_scb_2
CALL jp_bdos_enter
XOR 0xff
LD (t_scb_3+2), A
; set new value an offset
LD C, 49
LD DE, t_scb_3
CALL jp_bdos_enter
; and wait for next key
JP wait_for_key
is_no_ctrl_p:
; Return key
CP ASCII_CR
JP NZ, t_is_no_cr
; update hi counter
LD A, 0xff
LD (flag1), A
; zero to low counter
XOR A
LD (flag0), A
; and dump next part
JP t_dump_part
t_is_no_cr:
; other key - zero counters
XOR A
LD (flag0), A
LD (flag1), A
JP print_next_byte
lo_ctr_0:
CALL t_get_key_wo_echo
OR A
JP Z, no_key_pressd
lo_ctr_set_ff:
LD A, 0xff
LD (flag0), A
JP wait_for_key
no_key_pressd:
LD A, (flag1)
OR A
JP Z, print_next_byte
LD A, (cmd_par_len)
DEC A
LD (cmd_par_len), A
JP NZ, print_next_byte
JP lo_ctr_set_ff
; ---------------------------------------------------
;
; ---------------------------------------------------
t_check_version
LD C, 12
CALL jp_bdos_enter
CP 0x26
JP C, t_ver_unsupported
CP 0x30
JP NC, t_ver_unsupported
RET
t_param_unknown:
LD E, 0x0
JP t_calc_msg_offset
t_handle_error:
LD E, 0x1
JP t_calc_msg_offset
t_is_ctrl_c:
LD E, 0x2
t_calc_msg_offset:
LD HL, t_message_tab
LD D, 0x0
ADD HL, DE
ADD HL, DE
LD E, (HL)
INC HL
LD D, (HL)
; C_WRITESTR - Output string
LD C, 9
JP jp_bdos_enter
; ---------------------------------------------------
; Print character
; Inp: E - charater to print
; ---------------------------------------------------
t_print:
LD A, (cmd_switch)
OR A
JP Z, t_con_output ; D
CP 1
JP Z, t_get_key_echo ; C
LD A, E
AND 0x7f ; limit to 0..127 codes
; check for printable
CP ASCII_SP
JP NC, t_con_output
CP ASCII_CR
JP Z, t_con_output
CP ASCII_LF
JP Z, t_con_output
CP ASCII_TAB
JP Z, t_con_output
CP ASCII_SO ; ^N 0xe
JP Z, t_con_output
CP ASCII_SI ; ^O 0xf
JP Z, t_con_output
LD A, (cmd_switch)
; if param='F', and unprintable char, do not print
CP 3
RET Z
; replace unprintable with '^'
PUSH DE
LD E, '^'
CALL t_con_output
POP DE
;
LD A, E
OR 0x40
LD E, A
JP t_con_output
; --------------------------------------------------
; Return keyboard key if pressed
; Out: A - key code, 0 - no key
; --------------------------------------------------
t_get_key_wo_echo:
LD E, 0xff
t_get_key_echo:
LD C, 6
JP jp_bdos_enter
t_con_output:
LD C, 2
JP jp_bdos_enter
t_ver_unsupported:
HALT
; ---------------------------------------------------
; Get next character from command line
; Out: A - character
; CF is set if EOL
; ZF is set if A=0
; ---------------------------------------------------
t_get_cmdl_char:
; there are still characters in the cmd line?
LD A, (cmd_par_len)
OR A
JP NZ, t_get_next_cmdc ; jump if not eol
CCF
RET
t_get_next_cmdc:
; decrement characters count
DEC A
LD (cmd_par_len), A
; get next character to A
LD HL, (t_buff_addr)
INC HL
LD A, (HL)
; update pointer
LD (t_buff_addr), HL
OR A
RET
; ---------------------------------------------------
;
; ---------------------------------------------------
get_numbr:
LD C, 10
CALL t_get_cmdl_char
LD HL, 0x0
t_do_nxt_lettr:
JP NC, t_has_a_lettr
OR A
RET
t_has_a_lettr:
CP ASCII_SP
RET Z
CALL t_is_digits
RET C
CP C
CCF
RET C
LD D, H
LD E, L
LD L, A
LD H, 0
LD A, C
CALL t_next_hl_de
PUSH HL
CALL t_get_cmdl_char
POP HL
JP t_do_nxt_lettr
; ---------------------------------------------------
;
; ---------------------------------------------------
t_is_digits:
SBC A, '0'
RET C
CP 10
JP C, .digit
SBC A, 7
CP 10
RET C
.digit:
CP 16
CCF
RET
; ---------------------------------------------------
;
; ---------------------------------------------------
t_next_hl_de:
OR A
RET Z
RRA
JP NC, .a0_is_0
ADD HL, DE
.a0_is_0:
EX DE, HL
ADD HL, HL
EX DE, HL
JP t_next_hl_de
; ---------------------------------------------------
;
; ---------------------------------------------------
t_get_nxt_byte:
LD HL, (t_buff_addr)
LD DE, 0xff00
ADD HL, DE
LD A, H
OR L
CALL Z, t_read_next_128
RET C
LD HL, (t_buff_addr)
LD A, (HL)
INC HL
LD (t_buff_addr), HL
RET
; ---------------------------------------------------
;
; ---------------------------------------------------
t_read_next_128:
LD DE, dma_buffer
;(F_DMAOFF) - Set DMA address
LD C, 26
CALL jp_bdos_enter
LD DE, fcb1
;(F_READ) - read next record
LD C, 20
CALL jp_bdos_enter
RRA
LD HL, dma_buffer
LD (t_buff_addr), HL
RET
; ---------------------------------------------------
; Variables
; ---------------------------------------------------
flag0:
db 0x00
flag1:
db 0x00
; Cmd line switch D-1, C-2, F-3
cmd_switch:
db 0x00
t_scb_mm:
db 0x00
t_cut_byte:
db 0x00
cmd_par_len:
db 0x00
t_buff_addr:
dw 0x0000
t_scb_1:
db 0x1c ; offset
db 0 ; read byte at offset onto a, and word into hl
db 0, 0
t_scb_2:
db 0x38 ; offset
db 0, ; read byte at offset onto a, and word into hl
db 0 ,0
t_scb_3:
db 0x38 ; offset
db 0xff ; save next byte to SCB+offset
db 0 , 0
;t_val_scb1
; dw 0x0000
t_message_tab:
dw msg_err_cmdline
dw msg_no_file
dw msg_interrupted
msg_err_cmdline:
db "o{ibka komandnoj stroki. ispolxzujte\r\n"
db "TYPE UFN SWITCH \t ili\r\n"
db "TYPE UFN SWITCH P \t ili\r\n"
db "TYPE UFN SWITCH P#\r\n\t"
db "s perekl`~atelem SWITCH:\tNO D C F\r\n"
db "$"
msg_no_file:
db "net fajla$"
msg_interrupted:
db "\r\nTYPE prerwana$"
filler1:
ds 88, 0x1A
filler2:
ds 1024+start-filler2, 0xe5
ENDMODULE
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