From 62356d933ac7c222f86fcbb12f30a54f1b888a5f Mon Sep 17 00:00:00 2001 From: Alan Cox Date: Thu, 11 Dec 2014 22:58:26 +0000 Subject: [PATCH] microdrive: move the work buffer somewhere better it was at 0x4000 to help debug, move it offscreen --- Kernel/platform-zx128/microdrive.s | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) diff --git a/Kernel/platform-zx128/microdrive.s b/Kernel/platform-zx128/microdrive.s index 519c9675..462c240e 100644 --- a/Kernel/platform-zx128/microdrive.s +++ b/Kernel/platform-zx128/microdrive.s @@ -34,6 +34,12 @@ .globl _mdv_hdr_buf .globl _mdv_len + +; +; Temporary 512 byte buffer used during boot only +; +MDV_BOOT_BUF .equ 0xB000 + SECTORID .equ 0x08 ; FIXME - set real format up! CSUM .equ 0x0E ; FIXME ditto @@ -371,7 +377,7 @@ mdv_boot: ; ; Spin up the boot volume ; - ld hl, #0x4000 + ld hl, #MDV_BOOT_BUF ld (_mdv_buf), hl ld a, #1 out (0xfe), a ; blue @@ -411,12 +417,12 @@ mdv_boot_loop: out (0xfe), a ; loading stripes ld d, a ; high byte of address ld e, #0 - ld hl, (_mdv_buf) + ld hl, #MDV_BOOT_BUF ld bc, #512 ldir call done_all ; check if we are complete jr z, mdv_boot_done - ld hl, #0x4000 ; we may have reloaded over this + ld hl, #MDV_BOOT_BUF ; we may have reloaded over this ld (_mdv_buf), hl not_fk: pop hl dec hl @@ -432,7 +438,7 @@ mdv_bad: cp #3 jr not_fk mdv_boot_done: - ld a, #0x7 + xor a out (0xFE), a ret -- 2.34.1