Fix misc. formatting in "Other MBCs" chapter (#354)

* Fix misc. formatting in "Other MBCs" chapter

* Apply requested PR changes

* Apply suggestions and restructure the magic values chapter

Co-authored-by: Antonio Vivace <[email protected]>

Author: ISSOtm

src/othermbc.md

@@ -9,29 +9,27 @@ four games is switched in. In theory, a MBC1M board could be made for 1
 Mbit or 512 kbit games by additionally not connecting A17 and A16
 outputs, but this appears not to have been done in licensed games.
 
-**MMM01** is a more complex that allows for games of different sizes.
-[Docs on Tauwasser.eu](https://wiki.tauwasser.eu/view/MMM01)
-
 **Bung** and **EMS** MBCs are reported to exist.
 
 ### EMS
 
-PinoBatch learned the game selection protocol for EMS flash carts from
-beware, who in turn learned it from nitro2k01. Take this with a grain of
-salt, as it hasn't been verified on the authentic EMS hardware.
+::: warning To be verified
+
+Take the following with a grain of salt, as it hasn't been verified on authentic EMS hardware.
+
+:::
 
-A [header](<#The Cartridge Header>) matching any of the
-following is detected as EMS mapper:
+A [header](<#The Cartridge Header>) matching any of the following is detected as EMS mapper:
 
--   Header name is "EMSMENU", NUL-padded
--   Header name is "GB16M", NUL-padded
--   Cartridge type ($0147) = $1B and region ($014A) = $E1
+- Header name is "EMSMENU", NUL-padded
+- Header name is "GB16M", NUL-padded
+- Cartridge type ($0147) = $1B and region ($014A) = $E1
 
 Registers:
 
-$2000 write: Normal behavior, plus save written value in $2000 latch
-$1000 write: $A5 enables configure mode, $98 disables, and other values have no known effect
-$7000 write while configure mode is on: Copy $2000 latch to OR mask
+- $2000 write: Normal behavior, plus save written value in $2000 latch
+- $1000 write: $A5 enables configure mode, $98 disables it, and other values have no known effect
+- $7000 write while configure mode is on: Copy $2000 latch to OR mask
 
 After the OR mask has been set, all reads from ROM will OR A21-A14 (the
 bank number) with the OR mask. This chooses which game is visible to the
@@ -40,70 +38,77 @@ nonsensical.
 
 The mapper does not support an outer bank for battery SRAM.
 
-To start a game, do the following in code run from RAM: Write $A5 to
-$1000, write game starting bank number to $2000, write any value to
-$7000, write $98 to $1000, write $01 to $2000 (so that 32K games
-work), jump to $0100.
+To start a game, perform the following steps with code running from RAM:
+
+1. Write $A5 to $1000
+2. Write game's first bank number to $2000
+3. Write any value to $7000
+4. Write $98 to $1000
+5. Write $01 to $2000 (so that 32K games work)
+6. Jump to $0100
 
 ## Wisdom Tree
 
-The Wisdom Tree mapper is a simple, cost-optimized one chip design
-consisting of a 74LS377 octal latch, aside from the ROM chip. Because
+The Wisdom Tree mapper is a simple, cost-optimized one-chip design
+consisting of a 74LS377 octal latch in addition to the ROM chip. Because
 the mapper consists of a single standard 74 series logic chip, it has
 two unusual properties:
 
-First, unlike a usual MBC, it switches the whole 32 kiB ROM area instead
-of just the $4000-$7FFF area. If you want to use the interrupt vectors
+First, unlike a usual MBC, it switches the whole 32 KiB ROM area instead
+of just the $4000-$7FFF area. Therefore, if you want to use [the interrupt vectors](<#Interrupt Handling>)
 with this cart, you should duplicate them across all banks.
-Additionally, since the initial state of the '377 can't be guaranteed,
+Additionally, since the 74LS377's contents can't be guaranteed when powering on,
 the ROM header and some code for switching to a known bank should also
 be included in every bank. This also means that the Wisdom Tree mapper
-could be used as a multicart mapper for 32 kiB ROMs, assuming there was
+could be used as a multicart mapper for 32 KiB ROMs, assuming there is
 enough ROM space in each bank for some small initialization code, and
 none of the ROMs wrote to the $0000-$7FFF area. For example, if the
 last 5 bytes of all banks are unused, games can be patched as follows:
 
-    ; At $0100 in all banks but the first
-      nop
-      jp $7FFB
-
-    ; At $7FFB in all banks
-      ld hl, $0100
-      ld [hl], a
-      jp hl
-
-Second, because the '377 latches data on the *positive* edge, and the
-value on the Game Boy data bus is no longer valid when the positive edge
-of the write pulse arrives, the designer of this mapper chose to use the
+```rgbasm
+; At $0100 in all banks but the first
+    nop
+    jp $7FFB
+```
+```rgbasm
+; At $7FFB in all banks
+    ld hl, $0100
+    ld [hl], a
+    jp hl
+```
+
+Second, because the 74LS377 latches data on the [*positive* write pulse edge](https://www.allaboutcircuits.com/textbook/digital/chpt-10/edge-triggered-latches-flip-flops/),
+and the value on the Game Boy data bus is no longer valid when the
+positive edge arrives, the designer of this mapper chose to use the
 A7-A0 address lines for selecting a bank instead of the data lines.
 Thus, the value you write is ignored, and the lower 8 bits of the
 address is used. For example, to select bank $XX, you would write any
 value to address $YYXX, where $YY is in the range $00-$7F.
 
-An emulator can detect a ROM designed for Wisdom Tree mapper in one of
-two ways:
 
--   ROM contains "WISDOM TREE" or "WISDOM\\x00TREE" (the space can
-    be $20 or $00), $0147 = $00, $0148 = $00, size \> 32k. This
-    method works for the games released by Wisdom Tree, Inc.
--   $0147 = $C0, $014A = $D1. These are the values recommended by
-    beware for 3rd party developers to indicate that the ROM is
-    targeting Wisdom Tree mapper hardware. (See below.)
 
 ## Magic values for detection of multicarts in emulators
 
+::: info proposal
+
+The following information should not be considered a universally adopted
+standard, but it's instead just a proposed solution. Actual adoption may vary.
+
+:::
+
 Sometimes it may be useful to allow a ROM to be detected as a multicart
 in emulator, for example for development of a menu for physical
-multicart hardware. These are values suggested by beware, and supported
-in BGB, for signaling that your ROM is supposed to interface a multicart
-mapper. Emulator authors who are interested in supporting multicart
-mappers are encouraged to support detection of these values in addition
-to the values described in each section, which are heuristics based on
-ROMs in the wild, which may not always be suitable for newly produced
-software. The values are deliberately chosen to be high entropy
-("random") such that the risk of an accidental false positive is
-unlikely.
-
-- $0147 = $c0, $014a = $d1 -\> Detect as Wisdom Tree
-- $0147 = $1b, $014a = $e1 -\> Detect as EMS multicart
-- $0147 = $be -\> Detect as Bung multicart
+multicart hardware. 
+
+Emulator authors who are interested in supporting the other multicart
+mappers are also encouraged to support detection of the following values.
+
+- Wisdom Tree mapper
+  - [ROM title](<#0134-0143 - Title>) is "WISDOM TREE" (the space may be a
+  $00 NUL character instead), $0147 = $00, $0148 = $00, size \> 32k.
+  This method works for the games released by Wisdom Tree, Inc.
+  - $0147 = $C0, $014A = $D1.
+- Detect as EMS multicart
+  - $0147 = $1b, $014a = $e1
+- Detect as Bung multicart
+  - $0147 = $be