130 lines
4.1 KiB
C
130 lines
4.1 KiB
C
#ifndef CPM_H
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#define CPM_H
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#include <stdint.h>
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/* EM requires 2-byte alignment, even on the i80, so we can't declare these
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* structures to contain uint16_ts. Use U16() to access them. */
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typedef struct
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{
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uint8_t dr;
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uint8_t f[11];
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uint8_t ex;
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uint8_t s1;
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uint8_t s2;
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uint8_t rc;
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uint8_t d[16];
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uint8_t cr;
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uint8_t r[3];
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}
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FCB;
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typedef struct
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{
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uint8_t dr;
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uint8_t src[11];
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uint8_t _padding[5];
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uint8_t dest[11];
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}
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RCB;
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typedef struct
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{
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uint8_t us;
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uint8_t f[11];
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uint8_t ex;
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uint8_t s[2];
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uint8_t rc;
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uint8_t al[16];
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}
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DIRE;
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typedef struct
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{
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uint8_t spt[2]; /* number of 128-byte sectors per track */
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uint8_t bsh; /* block shift; 3=1kB, 4=2kB, 5=4kB etc */
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uint8_t blm; /* block mask; 0x07=1kB, 0x0f=2kB, 0x1f=4k etc */
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uint8_t exm; /* extent mask */
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uint8_t dsm[2]; /* maximum block number */
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uint8_t drm[2]; /* maximum directory entry number */
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uint8_t al[2]; /* directory allocation bitmap */
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uint8_t cks[2]; /* checksum vector size */
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uint8_t off[2]; /* number of reserved tracks */
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}
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DPB;
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/* Access an unaligned field (see above). */
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#define U16(ptr) (*(uint16_t*)(ptr))
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extern FCB cpm_fcb; /* primary FCB */
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extern FCB cpm_fcb2; /* secondary FCB (special purpose) */
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extern uint8_t cpm_iobyte;
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extern uint8_t cpm_default_dma[128]; /* also contains the parsed command line */
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extern uint8_t* cpm_ram;
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extern uint8_t* cpm_ramtop;
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extern uint8_t cpm_cmdlinelen;
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extern char cpm_cmdline[0x7f];
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/* Special: parses a filename into an FCB. Returns the user code (if any).
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* Warning: cannot fail (because CP/M filespecs are incredibly lax). */
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extern uint8_t cpm_parse_filename(FCB* fcb, const char* filename);
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/* Special: if the CCP hasn't been overwritten, returns to it; otherwise does
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* a warmboot. */
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extern void cpm_exit(void);
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/* Special: equivalent to cpm_read_random() except if you read unwritten data
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* 0 is returned (and the buffer contains garbage). */
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extern uint8_t cpm_read_random_safe(FCB* fcb);
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/* Extends cpm_ramtop over the CCP, for a little extra space. */
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extern void cpm_overwrite_ccp(void);
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/* 0 */ extern void cpm_warmboot(void);
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/* 1 */ extern uint8_t cpm_conin(void);
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/* 2 */ extern void cpm_conout(uint8_t b);
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/* 3 */ extern uint8_t cpm_auxin(void);
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/* 4 */ extern void cpm_auxout(uint8_t b);
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/* 5 */ extern void cpm_lstout(uint8_t b);
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/* 6 */ extern uint8_t cpm_conio(uint8_t b);
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/* 7 */ extern uint8_t cpm_get_iobyte(void);
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/* 8 */ extern void cpm_set_iobyte(uint8_t iob);
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/* 9 */ extern void cpm_printstring(const char* s); /* $-terminated */
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/* 10 */ extern uint8_t cpm_readline(uint8_t* buffer);
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/* 11 */ extern uint8_t cpm_const(void);
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/* 12 */ extern uint16_t cpm_get_version(void);
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/* 13 */ extern void cpm_reset_disk_system(void);
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/* 14 */ extern void cpm_select_drive(uint8_t disk);
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/* 15 */ extern uint8_t cpm_open_file(FCB* fcb);
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/* 16 */ extern uint8_t cpm_close_file(FCB* fcb);
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/* 17 */ extern uint8_t cpm_findfirst(FCB* fcb);
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/* 18 */ extern uint8_t cpm_findnext(FCB* fcb);
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/* 19 */ extern uint8_t cpm_delete_file(FCB* fcb);
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/* 20 */ extern uint8_t cpm_read_sequential(FCB* fcb);
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/* 21 */ extern uint8_t cpm_write_sequential(FCB* fcb);
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/* 22 */ extern uint8_t cpm_make_file(FCB* fcb);
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/* 23 */ extern uint8_t cpm_rename_file(RCB* rcb);
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/* 24 */ extern uint16_t cpm_get_login_vector(void);
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/* 25 */ extern uint8_t cpm_get_current_drive(void);
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/* 26 */ extern void cpm_set_dma(void* ptr);
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/* 27 */ extern uint8_t* cpm_get_allocation_vector(void);
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/* 28 */ extern void cpm_write_protect_drive(void);
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/* 29 */ extern uint16_t cpm_get_readonly_vector(void);
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/* 30 */ extern uint8_t cpm_set_file_attributes(FCB* fcb);
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/* 31 */ extern DPB* cpm_get_dpb(void);
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/* 32 */ extern uint8_t cpm_get_set_user(uint8_t user);
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/* 33 */ extern uint8_t cpm_read_random(FCB* fcb);
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/* 34 */ extern uint8_t cpm_write_random(FCB* fcb);
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/* 35 */ extern void cpm_seek_to_end(FCB* fcb);
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/* 36 */ extern void cpm_seek_to_seq_pos(FCB* fcb);
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/* 37 */ extern uint8_t cpm_reset_drives(uint16_t drive_bitmap);
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/* 40 */ extern uint8_t cpm_write_random_filled(FCB* fcb);
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#define cpm_get_user() cpm_get_set_user(0xff)
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#define cpm_set_user(u) cpm_get_set_user(u)
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#endif
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