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Insanity #01
20 июля 1999 |
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RAM Project - considerations Zetter'a of RAM Disk'e.
(R) Surv! V0r
EeЄєЇїЎў ° ∙ · √ № ¤ ■ RAM PROJECT ■ ¤ № √ · ∙ °
ўЎїЇєЄeE
Today in our room, we will present you with the opportunity
acquainted with the project Zetter'a (author's well-known and
popular program SSO1.0) "Menedzher upper memory." The system
contained the material is fairly spetsifichina and
time-consuming for acquaintance with it. Published in the SC #
1 article, and program Flying'a on the same issue will help you
compare these two System Ram Disk'a. Their implementation of
the program, or even possible say "core" nashlo (a) only on
paper. In principle itself ideas should be ponyatnymi.Po
Zetter'a own words, this tools will make soon a new version
program SSO.
(C) Zetter
Memory Manager for 128/1024k Mashines
Project Version 0.5 (c) Zetter 1999
Technical info:
Max Memory: 1024k
Max Work Memory: 512k (inside VirtMem)
Max Special Memory: 512k (used for special bloks and free use)
Max Bloks: 256 bloks
Max Free Bytes: 512k bytes for programs and data + 480k for spe
cial use
Max Continuous mem available: 16128 bytes
Max Continuous Mem available in special mode: 16384 bytes
Page Map
49152 65408 65535
n 16256 128
Catalog page
65408: START CATALOGUE
+0: B - unit (LUN)
+1: \ "MMv0.50"
+7: /
65416: BLOK TABLE F
(+0) +8: B - the block number (0 - free) / - ^ - \
(+1) +9: B - blok flag: 0 - free
1 - (M) emory X V S P M
2 - (P) rogram
4 - (S) prite 7 6 5 4 3 2 1 0
7 - (F) ull blok
+128 - Fi (X) ed unit, fixed at this
page
+ 64 - (V) irtual memory blok
Program blocks are fixed on the page and fdresu
Fixed units are fixed only on the page
(+4) +10: W-addr in page
(+2) +12: W-blok lenght (if flag = 4 then Xlen, Ylen)
(+6) +14: W-Start addr:
'Home' address for memory or program,
Xzn_scr, Yzn_scr for sprite
Memory Types
RAM512 - memory in computers 128-1024K, up to 512K, ie
32 pages
without considering the deleted pages (2,5, etc.)
RAM1024 - memory in computers with 1024K remaining after
create RAM512
In 48k Memory:
Memory Map: creating a function: InitMem 'AddPage
Mem_Map
+000: B Unit / Full - 256 times
+ ...
+255: B Unit / Full
Unit / Full format: 7 6 5 4 3 2 1 0
F V U U U U U U
U - logical page number 0-63
F - Full: This block covers the entire page (16K) 1
/ 0
V - Virtual page 1 - yes 0 - no
# FF - to block this number is not fixed
format block numbers: in order.
table of memory: (len 1024 bytes (512k available))
creating a function: InitMem 'AddBloks
FreeTab; unit 0 - logical page 0
+0: W - start free bytes 1, the beginning of free space
unit 0, free
Block 0. '0 '- Not this block
+2: W - lenght free bytes 1, length of free space in the
unit 0, free
Block 0. '0 '-No this block
...
+28: W - start free bytes 8
+30: W - lenght free bytes 8
; Logical unit 1,2 ... 32 Repeat for all the logical page.
Place under non-existent pages contain # FF
Table of logical pages (temporary)
creating a function: TestMem
broken up 'tables existing pages': TestMem
PageTab (serial number - the logical, the content - physical)
+0: B - '0 '
+1: B - '1 '
...
+63: B - '63 '
Table of existing pages RAM512
creating a function: TestMem.
PageTab512 (serial number - a logical, content-physical)
+0: B - unit 0
+1: B - unit 1
...
**+?: B - the last physical page (bit 7-ON: Virtual Page)
** +? - The last logical page
+?: # FF - end mark RAM512
Table of existing pages RAM1024
creating a function: TestMem.
PageTab1024 (serial number - a logical, content - the physical
page)
+0: B - page 0 (if this byte is 0 - not found memory
RAM1024)
+1: B - page 1
...
+?: B - the last physical page of a 512-1024k
+?: # FF - end mark RAM1024
Table FULL blocks (if any RAM1024) 64 bytes
+00: B - LUN RAM1024 straniitsy
+01: B - 0 - empty, 1 - FULL blok, # FF - physical absence
page
....
+62: B
+63: B
FUNCTIONS
1. Saving functions: functions of creating and writing blocks
Standart Input:
A - blok flag MPSF
HL-Start addr (Xzn_scr, Yzn_scr) NOR 001 002 004 007
BC-Lenght (Xlen, Ylen) FIX 129130132 -
Standart Output:
A - the block number (0-out of memory) VIR 065 066 068 071
[DE - block address in a page] * F + V 193194196 -
(For the debug A = 255 - error i / o)
* Function returns the value
1.1 ClearPage
Input: none
Output: A = any - ok; 0 - out of memory
Cleans up some memory page from the blocks. Next
for ClearPage team Put??? put it on this block has already
cleared the page in the address 49152. Need to download
software in memory. Steps: 1. Clear page 2. Put???
(Took place under a piece of program code) 3. PutTo A = (Put???)
(Attached to the software unit) 4. Put???, Put ???... (Loads
the data into the same page, where is the program) 5. PutTo A =
0 (Disables snapping)
1.2 PutTo
Input: A - the block number to which to commit. 0 -
undo command
Output: A = 0 - ok; # FF - not found; other - error i
/ o Allows you to write blocks to a page which has a block A
Command action a long-term, defeated by the transfer 0 as the
parameter. When the binding could plummet speed because of the
need for frequent execution ClearPage as memory will be
searched within a 16k page. For newly created units will
automatically perform the function FixBlok
1.3 Put start_adres, lenght, flag
Standart i / o *
creates a block and returns all the parameters of the
block
1.4 PutReal
Standart i / o
creates a block and moves it into RAM512
2. Load Functions: reading function blocks
Standart input: A - the block number
Standart output: HL-block address in the page
DE-setting unit Start Addr
BC-block length
A - 0 - ok, # FF - Not Found,
Other - error i / o
2.1 Get
Standart i / o
returns all the block parameters
2.2 GetReal
Standart i / o
moves a block of memory in the 'Start Addr'
3.Other functions
3.1 DelBlok
Input: A - the block number
Output: A - 0 - ok, # FF - Not Found, Other - error i
/ o Remove the block. number of the block is removed from the
memory card MemoryMap
3.2 FixBlok
Input: A - the block number
Output: A - 0 - ok, # FF - Not Found, Other - error i
/ o Commits block A on the page on which it is found by
affixing a flag Fi (X) ed in BlokFlag. With this unit will not
work function and MoveMem ClearPage
3.3 AutoFlush
Input: A = 1: ON; A = 0: OFF
Output: none
In the ON state attempt to deal with
Command error Put??? - Out of memory, not terrorizing an
application of the above wild shouts. Working with functions
and FlushMem MoveMem, trying to find a place to block. Failing
this still gives an error, allowing the application to their
own press the reset ;-) In this case, the program is
recommended to have some unnecessary components such as undo
buffer and retry Put??? In OFF state system makes no attempt to
free up memory, giving it an honorable duty of a software
program
-
WARNING !!!!!
DO NOT abuse the fixation blocks
and software blocks! Remember that your program can be
running at 128k car! Probability-of-memory
is directly proportional to the number of Program and Fixed
Blocks!! Use this option only if necessary! " APPLICATION
VirtMem to increase the amount of available memory can cause a
state of shock from the user of your program. If you are an
all-yet decided on such a heroic deed, it is not Remember to
use the PutVirt??? Only for those blocks that you plan to put
on VirtMem. As a rule it should be blocks to be used very
rarely, such as levels, loadable to the game or what that
external functions in the system program
4. Memory Functions: the function of memory blocks (RAM512)
Names pamati: RAM512 - 48-512k pages
RAM1024 - over 512k RAM pages
Virt - Virtual (disk) pages.
If the RAM> 128k, Virt mem NOT USED
4.1 FreeMem
Input: none
Output: HL - Total free memory
DE - Free RAM512
BC - free RAM1024
IX - free VirtMem
4.2 MaxMem
Input: none
Output: HL - maximum continuous region in RAM512
4.3 FlushMem
Input: none
Output: HL - maximum continuous region in RAM512
Not move PROGRAM blocks within a single page. Gives the maximum
continuous memory RAM512 This function does not work with Virt
memory.
4.4 MoveMem
Input: none
Output: HL - maksimalinaya continuous memory RAM512 not
move PROGRAM and NOT FIXED blocks of pages in the page to get
really possible contiguous memory. Performed in an emergency
shortage of memory or when you call ClearPage This feature does
not work with Virt memory.
4.5 FlushPage
Input: A - number of the block, whose homepage you want
to clean
Output: HL - maximum continuous memory in this page and
not move PROGRAM IS NOT FIXED blocks except Block A of This
page on other pages. Gives the maximum memory single page to
accommodate the fixed blocks this function does not work with
Virt memory.
A - 0 - ok, # FF - not found, other - error i / o
-
5. Initialise Functions: initialization function
These functions are used for the initial launch of the
program * 5.1 TestMem ()
Input: HL - sign PageTab (auto-installed)
Output: HL - sign PageTab512
DE - sign PageTab1024 (DE) = 0 - RAM1024 no
A - total number of pages available, take in
(ALLPAGES)
Determines the available memory kompyutera.Ne destroys
data stranichkah.Ustanavlivaet (MEMTYPE) * 5.2 DelPage
pagetab???, Page
Input: HL - Plate RAM512 or RAM1024
A - the physical number of pages to delete
Output: A - 0: ok; # FF - not found; other - error i / o
5.3 AddBloks
Input: A - logical page number to be added to
Directory structure blocks
Output: A = 0: ok; A = other-This page does not contain
Block structure of A = # FF - not found page, or i / o error
Feature for programmers by Memory Manager. Adds manually
creating a page with blocks in MemoryMap * 5.4 InitMem ()
Input: HL - sign RAM512
Output: A = 0: ok
a = # FF: error i / o
Create a directory structure on the free pages
RAM512 and puts them in MemoryMap. Skips pages occupied
Employed under the blocks page is defined by the signature "?
MMv?." c 49152
5.6 CreateVirtMem
Input: HL - the beginning of the base name:
- 8 character file name
B - number of added Virt Pages
Output: A - 0 - ok, other-i / o error
If you do not exist, writes files to disk Virtual Mem.
5.5 AddVirtPage
Input: A - the number added Virt pages
HL-address structure:
0-7: name \
8: Virtual page number |
9: Start adres (49152) |
10: \
11: bytes len (16384) / 16 bytes TR-DOS name
1912: |
13: Sector len (64 |
14: Start track |
15: Start sector /
. . .
Output: A - 0 - ok, other-i / o error
Clears the directory and adds Virt pages in MemoryMap.
6. Internal functions
6.1 SearchByte: in - HL - Launch
A - B
out-HL - Address
A - B or # FF - not found
corrupt: B
Search for bytes from HL to (A) or before the first
# FF
Variables:
ALLPAGES.b - the total number of pages available
MEMTYPE.b - the type of memory found 0 - no RAM1024, 1 - a
PageTab512.w - a pointer to the beginning of the table RAM512.
PageTab1024.w - a pointer to the beginning of the table
RAM1024, if con contains 0 - no memory RAM1024
BlokF.b - the flag of the current block
BlokST.w - starting address of the current block
BlokL.w - The length of the current block
BlokLOG.b - logical page for the current block
BlokNUM.b - number of the current block
BlokPAGE.w - Place the current block on the page
BlokFTab.w - address space for the current block
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