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Format of COMBI-disk command packet

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Offset Size Description

00h

WORD

version

02h

BYTE

command code (see #01538)

---command code 80h---

no additional fields

---command code 81h---

03h

BYTE

new options byte (see #01540)

---command code 82h---

03h

WORD

number of KB to release

---command code 83h---

03h

WORD

number of KB to expand

---command code 84h---

03h

DWORD

buffer for block info (see #01541)

---command code 85h---

03h

DWORD

block ID

---command code 86h---

03h

BYTE

which counters to reset
bit 0 : hard disk read counts
bit 1 : hard disk write counts
bit 2 : RAM disk read/write counts

Note:

Multiple commands may be placed in a single packet by stringing together as many command/argument pairs as desired.