Add ZIPCHIP.SYSTEM
This detects a ZIP CHIP and, if present, configures it to slow down for speaker access, leaving the other settings alone. In the future maybe there will be a configuration utility to control the slots, as was included with the ZIP CHIP back in the day.
This commit is contained in:
Joshua Bell
parent
01175cf573
commit
93e48784b9
2
Makefile
2
Makefile
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@ -1,4 +1,4 @@
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targets := clocks selectors ram.drv util textcolors
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targets := clocks selectors accelerators ram.drv util textcolors
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.PHONY: all $(targets) package
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@ -32,6 +32,8 @@ This repo includes the following drivers/modifications:
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* ROMX Real-Time Clock
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* FujiNet Clock
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* A "jumbo" driver that includes all of the above (just called `CLOCK.SYSTEM`)
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* Accelerators
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* ZIP CHIP configuration (sets the chip to slow on speaker access)
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* RAM Disk drivers
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* RAMWorks Driver by Glen E. Bredon
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* Quit dispatcher/selector (`BYE` routines)
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@ -60,6 +62,7 @@ The intent is that you use a tool like Copy II Plus or [Apple II DeskTop](https:
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* `FN.CLOCK.SYSTEM` - install FujiNet clock driver, if present
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* `DCLOCK.SYSTEM` - install DClock clock driver, if present
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* `CRICKET.SYSTEM` - install Cricket! clock driver, if present
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* `ZIPCHIP.SYSTEM` - slow the ZIP CHIP on speaker access, if present
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* `RAM.DRV.SYSTEM` - install RamWorks RAM disk driver, if present
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* `BUHBYE.SYSTEM` - install a customized Quit handler to replace the built-in one
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* `PAUSE.SYSTEM` - pause for a moment, so that you can inspect the output of the above
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@ -0,0 +1,22 @@
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targets := zipchip
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.PHONY: all $(targets)
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all: $(targets)
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export LOG_SUCCESS
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export LOG_FAILURE
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# Build all targets
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$(targets):
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@tput setaf 3 && echo "Building: $@" && tput sgr0
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@$(MAKE) -C $@ \
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&& (tput setaf 2 && echo "make $@ good" && tput sgr0) \
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|| (tput blink && tput setaf 1 && echo "MAKE $@ BAD" && tput sgr0 && false)
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# Clean all temporary/target files
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clean:
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@for dir in $(targets); do \
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tput setaf 2 && echo "cleaning $$dir" && tput sgr0; \
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$(MAKE) -C $$dir clean; \
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done
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@ -0,0 +1,42 @@
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CAFLAGS = --target apple2enh --list-bytes 0
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LDFLAGS = --config apple2-asm.cfg
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OUTDIR = out
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HEADERS = $(wildcard *.inc) $(wildcard ../inc/*.inc)
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TARGETS = \
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$(OUTDIR)/zipchip.system.SYS
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LOG_SUCCESS=1
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LOG_FAILURE=1
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# For timestamps
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MM = $(shell date "+%-m")
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DD = $(shell date "+%-d")
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YY = $(shell date "+%-y")
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DEFINES = -D DD=$(DD) -D MM=$(MM) -D YY=$(YY) \
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-D LOG_SUCCESS=$(LOG_SUCCESS) -D LOG_FAILURE=$(LOG_FAILURE)
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XATTR := $(shell command -v xattr 2> /dev/null)
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.PHONY: clean all
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all: $(OUTDIR) $(TARGETS)
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$(OUTDIR):
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mkdir -p $(OUTDIR)
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clean:
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rm -f $(OUTDIR)/*.o
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rm -f $(OUTDIR)/*.list
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rm -f $(TARGETS)
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$(OUTDIR)/%.o: %.s $(HEADERS)
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ca65 $(CAFLAGS) $(DEFINES) --listing $(basename $@).list -o $@ $<
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$(OUTDIR)/%.BIN $(OUTDIR)/%.SYS: $(OUTDIR)/%.o
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ld65 $(LDFLAGS) -o $@ $<
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ifdef XATTR
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xattr -wx prodos.AuxType '00 20' $@
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endif
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@ -0,0 +1,159 @@
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;;; ZIPCHIP.SYSTEM
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;;; Configures the speaker to be temporarily slow
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;;; TODO: Add a configuration utility
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.setcpu "6502"
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.linecont +
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.feature string_escapes
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.include "apple2.inc"
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.include "apple2.mac"
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.include "opcodes.inc"
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.include "../../inc/apple2.inc"
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.include "../../inc/macros.inc"
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.include "../../inc/prodos.inc"
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.include "../../inc/ascii.inc"
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;;; ************************************************************
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.include "../../inc/driver_preamble.inc"
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;;; ************************************************************
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;; From ZIP Chip Manual v1 1987
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ZC_REG_LOCK := $C05A
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;; Write:
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;; $A5 Locks the ZIP CHIP.
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;; 4 consecutive $5A writes unlock ZIP CHIP.
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;; While unlocked, any write other than $A5 or
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;; $5A will initiate an indefinate syncronous [sic]
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;; sequence.
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kZCLock = $A5
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kZCUnlock = $5A
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ZC_REG_ENABLE := $C05B
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;; Write - Any hex byte written will enable ZIP CHIP
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;;
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;; Read - Read the current status of the following:
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;; bit 0 & 1 - Ramsize where
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;; RAMSIZE1 RAMSIZE0 SIZE
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;; 0 0 8K
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;; 0 1 16K
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;; 1 0 32K
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;; 1 1 64K
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;; bit 2 - unused
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;; bit 3 - Delay (for memory)
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;; 0 = Fast Mode - Delay not in effect
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;; 1 = Sync Mode - Delay in effect
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;; bit 4 - Disabled/enabled
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;; 0 = Chip Enabled
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;; 1 = Chip Disabled
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;; bit 5 - Paddle fast/normal
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;; 0 = Fast Mode
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;; 1 = Synchronous Mode (Normal)
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;; bit 6 = Cache Updated by data read
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;; 0 = No update
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;; 1 = Yes cache updated
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;; bit 7 = Clock Pulse - 1.0035 milliseconds
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;; Edges occur at .50175 milliseconds
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ZC_REG_SLOTSPKR := $C05C
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;; Read/Write - Slow/Speaker set and read
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;; 0 = Set slot/speaker Fast
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;; 1 = Set slot/speaker Normal
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;; bit 0 - Speaker bit 4 - Slot 4
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;; bit 1 - Slot 1 bit 5 - Slot 5
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;; bit 2 - Slot 2 bit 6 - Slot 6
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;; bit 3 - Slot 3 bit 7 - Slot 7
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ZC_REG_SYSSPEED := $C05D
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;; Write - Set System Speed
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;; bit 0 - unused bit 4 - Clk4/5
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;; bit 1 - unused bit 5 - Clk5/6
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;; bit 2 - Clk2/3 bit 6 - Clk/2
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;; bit 3 - Clk3/4 bit 7 - Clk/4
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;; NOTE: bit 6 and bit 7 yield Clk/3
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ZC_REG_SYNCOP := $C05E
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;; Write - Enable/Disable Synchronous Operation
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;; for I/O Devices
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;; bit 0 through bit 6 - Not Used
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;; bit 7 - Enable/Disable Delay
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;; 0 = Enable Delay
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;; 1 = Disable and Reset Delay
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ZC_REG_SOFTSW := $C05E
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;; Read - Read Apple softswitches
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;; 0 = False
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;; 1 = True
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;; bit 0 - ROMRD bit 4 - 80STORE
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;; bit 1 - RAMBNK bit 5 - MWR
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;; bit 2 - PAGE2 bit 6 - MRD
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;; bit 3 - HIRES bit 7 - ALTZP
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ZC_REG_PDLBSLC := $C05F
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;; Write - Paddle Speed, Bank Switch Language Card
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;; bit 0 through bit 5 - Not Used
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;; bit 6 - Paddle Set
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;; 0 = Disable Paddle Delay
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;; 1 = Enable Paddle Delay
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;; bit 7 - Language Card Enable/Disable
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;; 0 = Enable Cache of Language Card Memory
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;; 1 = Disable Cache of Language Card Memory
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.undef PRODUCT
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.define PRODUCT "ZIP CHIP"
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.proc maybe_install_driver
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php ; timing sensitive
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sei
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;; Unlock
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lda #kZCUnlock
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sta ZC_REG_LOCK
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sta ZC_REG_LOCK
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sta ZC_REG_LOCK
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sta ZC_REG_LOCK
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;; ZIP CHIP present?
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lda ZC_REG_SLOTSPKR
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eor #$FF
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sta ZC_REG_SLOTSPKR
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cmp ZC_REG_SLOTSPKR
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bne no_zip
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eor #$FF
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sta ZC_REG_SLOTSPKR
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cmp ZC_REG_SLOTSPKR
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bne no_zip
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;; Slow on speaker access
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lda ZC_REG_SLOTSPKR
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ora #%00000001 ; bit 0 = Speaker
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sta ZC_REG_SLOTSPKR
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;; Lock
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lda #kZCLock
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sta ZC_REG_LOCK
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;; TODO: Include cache size?
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jsr log_message
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scrcode PRODUCT, " - Configured."
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.byte 0
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plp
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rts
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no_zip:
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jsr log_message
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scrcode PRODUCT, " - Not Found."
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.byte 0
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plp
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rts
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.endproc
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;;; ************************************************************
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.include "../../inc/driver_postamble.inc"
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;;; ************************************************************
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@ -35,6 +35,7 @@ add_file "selectors/out/bbb.system.SYS" "bbb.system#FF0000" "/$VOLNAME
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add_file "selectors/out/buhbye.system.SYS" "buhbye.system#FF0000" "/$VOLNAME"
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add_file "selectors/out/bye.system.SYS" "bye.system#FF0000" "/$VOLNAME"
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add_file "selectors/out/selector.system.SYS" "selector.system#FF0000" "/$VOLNAME"
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add_file "accelerators/zipchip/out/zipchip.system.SYS" "zipchip.system#FF0000" "/$VOLNAME"
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add_file "util/out/quit.system.SYS" "quit.system#FF0000" "/$VOLNAME"
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add_file "util/out/pause.system.SYS" "pause.system#FF0000" "/$VOLNAME"
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add_file "util/out/me.first.system.SYS" "me.first.system#FF0000" "/$VOLNAME"
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